MCQOPTIONS
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MCQOPTIONS
This section includes 2637 Mcqs, each offering curated multiple-choice questions to sharpen your 7th Class knowledge and support exam preparation. Choose a topic below to get started.
| 1901. |
If an object is placed between focus and pole of the concave mirror then image formed will be: |
| A. | Diminished and erect |
| B. | Inverted and diminished |
| C. | Magnified and erect |
| D. | Magnified and inverted |
| E. | None of these |
| Answer» D. Magnified and inverted | |
| 1902. |
___ is used in car headlights to reflect the light of the bulb. |
| A. | Concave mirror |
| B. | Convex mirror |
| C. | Convex lens |
| D. | Concave lens |
| E. | None of these |
| Answer» B. Convex mirror | |
| 1903. |
Bulging outward surface of a spoon is: |
| A. | Concave |
| B. | Convex |
| C. | Plane mirror |
| D. | Concavo-convex |
| E. | None of these |
| Answer» C. Plane mirror | |
| 1904. |
Current means: |
| A. | Flow of protons in the circuit. |
| B. | Flow of neutrons in the circuit. |
| C. | Flow of electrons in the circuit. |
| D. | All the above |
| E. | None of these |
| Answer» D. All the above | |
| 1905. |
____ is a magnet produced by electric current. |
| A. | Bar magnet |
| B. | Permanent magnet |
| C. | Electromagnet |
| D. | All the above |
| E. | None of these |
| Answer» D. All the above | |
| 1906. |
A circuit in which current is flowing, consists of a steel spoon coiled with copper wire, when some allpins are brought near this spoon, the allpins get attracted due to: |
| A. | Heating effect of current |
| B. | Chemical effect of current |
| C. | Magnetic effect of current |
| D. | All the above |
| E. | None of these |
| Answer» D. All the above | |
| 1907. |
A solenoid acts as a ___ when electric current passes through it. |
| A. | Resistor |
| B. | Bar magnet |
| C. | Insulator |
| D. | Electric torch |
| E. | None of these |
| Answer» C. Insulator | |
| 1908. |
More heat is produced in an electric circuit when: |
| A. | Magnitude of current is increased. |
| B. | Wire with greater resistance is use. |
| C. | Bulb with broken filament is used. |
| D. | Both [a] and [b] |
| E. | None of these |
| Answer» E. None of these | |
| 1909. |
Thickness of wire used in working circuit M is more than the thickness of wire used in circuit N. Which of the following options is correct? |
| A. | More heat will be produced in circuit M than circuit N. |
| B. | More heat will be produced in circuit N than circuit M. |
| C. | Equal amount of heat will be produced in both the circuits. |
| D. | No heat will be produced. |
| E. | None of these |
| Answer» D. No heat will be produced. | |
| 1910. |
When a switch is in ON position, (i) Circuit is open (ii) Circuit is closed (iii) Current is flowing in the circuit (iv) No Current is flowing through it Choose the correct combination of answer for the above information. |
| A. | (i) and (ii) |
| B. | (ii) and (iii) |
| C. | (iii) and (iv) |
| D. | (i) and (iv) |
| E. | None of these |
| Answer» C. (iii) and (iv) | |
| 1911. |
An instrument that automatically stops the current in a circuit if the current in it exceeds the specified maximum limit. |
| A. | Positive terminal |
| B. | MCB |
| C. | Negative terminal |
| D. | ISI |
| E. | None of these |
| Answer» C. Negative terminal | |
| 1912. |
DIRECTIONS: On the basis of following diagram / picture answer the questions given below: The diagram shows an electric bell which materials would be suitable for the parts labeled P, Q and R? P Q R A soft iron brass soft iron B soft iron soft iron spring steel C soft iron brass brass D spring steel soft iron spring steel |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» C. C | |
| 1913. |
DIRECTIONS: On the basis of following diagram / picture answer the questions given below: Four different circuits are shown below. In which of the above circuits would the bulb light up? |
| A. | R only |
| B. | R and S only |
| C. | P, Q and R only |
| D. | P, Q and S only |
| Answer» C. P, Q and R only | |
| 1914. |
DIRECTIONS: On the basis of following diagram / picture answer the questions given below: In the circuit below, which switch should be left open and which switch should be left closed so that only bulb Y lights up? Switch A Switch B Switch C Switch D |
| A. | Closed Closed Open Open |
| B. | Closed Open Open Closed |
| C. | Open Open Closed Closed |
| D. | Open Closed Closed Open |
| Answer» D. Open Closed Closed Open | |
| 1915. |
Select the one that you will prefer to make an electromagnet. |
| A. | Steel |
| B. | Plastic |
| C. | Stainless steel |
| D. | Soft iron |
| Answer» E. | |
| 1916. |
A Why is electrical wiring usually covered with a layer of plastic? |
| A. | To make it strong |
| B. | To allow electricity to flow in it |
| C. | To make it safe |
| D. | To make it beautiful |
| Answer» D. To make it beautiful | |
| 1917. |
DIRECTIONS: On the basis of following diagram / picture answer the questions given below: Which of the following energy conversions takes place in the figure given here? |
| A. | Solar\[\to \]electrical |
| B. | Solar\[\to \]light\[\to \]heat |
| C. | Solar\[\to \]electrical\[\to \]light |
| D. | Solar\[\to \]electrical\[\to \]light\[\to \]heat |
| Answer» D. Solar\[\to \]electrical\[\to \]light\[\to \]heat | |
| 1918. |
DIRECTIONS: The questions in this segment consist of two statements, one labeled as "Assertion A" and the other labeled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): When a battery is short-circuited, the terminal voltage is zero. Reason (R): In the situation of a short-circuit, the current is zero. |
| A. | Both A and R are true and R is the correct explanation of A. |
| B. | Both A and R are true but R is not the correct, explanation of A. |
| C. | A is true but R is false. |
| D. | A is false but R is true. |
| Answer» D. A is false but R is true. | |
| 1919. |
DIRECTIONS: The questions in this segment consist of two statements, one labeled as "Assertion A" and the other labeled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): It is fatal to touch a live wire with bare feet and uncovered hands. Reason (R): The electric current passes through the body to the earth forming a circuit and bums the blood. |
| A. | Both A and R are true and R is the correct explanation of A. |
| B. | Both A and R are true but R is not the correct, explanation of A. |
| C. | A is true but R is false. |
| D. | A is false but R is true. |
| Answer» B. Both A and R are true but R is not the correct, explanation of A. | |
| 1920. |
DIRECTIONS: Read the passage given below and answer the questions that follow. Passage When an electric current passes through a wire, it behaves like a magnet. This is the magnetic effect of current. When the electric current is switched off, the coil generally loses magnetism. Such coils are called electromagnets. Look at the following diagram and tell if compass needle placed near the connecting wire will show deflection when the switch in the circuit is in 'ON' position? |
| A. | It will show deflection |
| B. | It will not show deflection |
| C. | Sometimes it will show deflection and sometimes it will not show any deflection |
| D. | None of the above is correct. |
| Answer» B. It will not show deflection | |
| 1921. |
DIRECTIONS: Read the passage given below and answer the questions that follow. Passage When an electric current passes through a wire, it behaves like a magnet. This is the magnetic effect of current. When the electric current is switched off, the coil generally loses magnetism. Such coils are called electromagnets. Which of the following make use of electromagnets? |
| A. | a crane |
| B. | an electric bell |
| C. | Both of these |
| D. | None of these |
| Answer» D. None of these | |
| 1922. |
A fuse is fixed in a circuit in order to |
| A. | decrease the amount of current |
| B. | increase the amount of current |
| C. | increase the power consumed in the circuit |
| D. | safeguard against excessive current. |
| Answer» E. | |
| 1923. |
DIRECTIONS: Match Column-I with Column-II and select the correct answer using the codes given below the columns. Column - I Column - II (A) The fuse wire is generally an alloy of (p) the metal of an electrical appliance is earthed (B) Electric fuse is connected in (q) the live wire and the neutral wire come in direct contact (C) To avoid the risk of electric shocks (r) Lead and tin (D) A short \[\]circuit occurs whenever (s) Series in the beginning of the electric circuit |
| A. | A\[\to \] (p), B\[\to \] (q), C\[\to \] (r), D\[\to \] (s) |
| B. | A\[\to \] (q), B\[\to \] (p), C\[\to \] (s), D\[\to \] (r) |
| C. | A\[\to \] (r), B\[\to \] (s), C\[\to \] (p), D\[\to \] (q) |
| D. | A\[\to \] (s), B\[\to \] (r), C\[\to \] (q), D\[\to \] (p) |
| Answer» D. A\[\to \] (s), B\[\to \] (r), C\[\to \] (q), D\[\to \] (p) | |
| 1924. |
DIRECTIONS: Match Column-I with Column-II and select the correct answer using the codes given below the columns. Column - I Column - II (A) MCB (p) Filament (B) Electromagnet (q) Element (C) Electric kettle (r) Electric bell (D) Electric bulb (s) Safety device |
| A. | A\[\to \] (s), B\[\to \] (r), C\[\to \] (q), D\[\to \] (p) |
| B. | A\[\to \] (p), B\[\to \] (q), C\[\to \] (r), D\[\to \] (s) |
| C. | A\[\to \] (r), B\[\to \] (q), C\[\to \] (p), D\[\to \] (s) |
| D. | A\[\to \](q), B\[\to \](s), C\[\to \](r), D\[\to \](p) |
| Answer» B. A\[\to \] (p), B\[\to \] (q), C\[\to \] (r), D\[\to \] (s) | |
| 1925. |
DIRECTIONS: Match Column-I with Column-II and select the correct answer using the codes given below the columns. Column - I Column - II (A) Battery (p) The thin wire in an electrical bulb that glows when electrical current passes through it (B) Filament (q) Combination of two or more cells (C) Electric geyser (r) Makes use of heating effect of current (D) Electric bell (s) Electromagnet |
| A. | A\[\to \] (p), B\[\to \] (q), C\[\to \] (r), D\[\to \] (s) |
| B. | A\[\to \] (p), B\[\to \] (q), C\[\to \] (s), D\[\to \] (r) |
| C. | A\[\to \] (q), B\[\to \] (p), C\[\to \] (r), D\[\to \] (s) |
| D. | A\[\to \] (q), B\[\to \] (p), C\[\to \] (s), D\[\to \] (r) |
| Answer» D. A\[\to \] (q), B\[\to \] (p), C\[\to \] (s), D\[\to \] (r) | |
| 1926. |
Marie conducted an experiment to find out if the number of bulbs arranged in series would affect the brightness of the bulbs. Which of the following variables should be kept the same? A. type of bulbs B. Number of wires C. types of batteries D. Number of bulbs |
| A. | D only |
| B. | B and D only |
| C. | A, B and C only |
| D. | A, B, C and D |
| Answer» D. A, B, C and D | |
| 1927. |
Electromagnet is not used in |
| A. | Electric bell |
| B. | Electric fan |
| C. | Magnetic sticker |
| D. | Television |
| Answer» D. Television | |
| 1928. |
A light bulb is connected in series with a battery, a switch and some wires. However, the light bulb does not light up. What is/are the possible reason(s)? A. The battery is weak. B. The switch is closed C. The bulb has blown D. The wires are made of copper |
| A. | A only |
| B. | A and C only |
| C. | B and D only |
| D. | B, C and D only |
| Answer» C. B and D only | |
| 1929. |
A substance that acquires the properties of a natural magnet is called. |
| A. | Artificial magnet |
| B. | Synthetic magnet |
| C. | Manmade magnet |
| D. | None of these |
| Answer» B. Synthetic magnet | |
| 1930. |
When the strength of the current flowing through a coil is increased |
| A. | Strength of the magnetic field decreases |
| B. | Strength of the magnetic field increases |
| C. | Amount of heat generated due to resistance decreases |
| D. | Strength of the magnetic field remains constant |
| Answer» C. Amount of heat generated due to resistance decreases | |
| 1931. |
A fuse wire repeatedly gets burnt when used with a good heater. It is advised to use a fuse wire of |
| A. | More length |
| B. | less radius |
| C. | Less length |
| D. | more radius |
| Answer» E. | |
| 1932. |
By whom was magnetic effect of current discovered? |
| A. | Faraday |
| B. | Fleming |
| C. | Oersted |
| D. | None of these |
| Answer» D. None of these | |
| 1933. |
Identify the element that is used for making the filament in bulbs. |
| A. | Tungsten |
| B. | Copper |
| C. | Aluminium |
| D. | Silver |
| Answer» B. Copper | |
| 1934. |
A small rod is wound round with certain coils and current is allowed to pass for some time. When the rod was taken out, it was found not to attract iron. The material of the rod may be |
| A. | Copper |
| B. | Cobalt |
| C. | Steel |
| D. | Nickel |
| Answer» B. Cobalt | |
| 1935. |
When main switch of the house circuit is put off, it disconnects the |
| A. | live wire |
| B. | neutral wire |
| C. | earth wire |
| D. | live and neutral wires |
| Answer» E. | |
| 1936. |
Which has no importance for fuse wire? |
| A. | Specific resistance of wire |
| B. | Diameter of wire |
| C. | Length of wire |
| D. | Current passing through the wire |
| Answer» D. Current passing through the wire | |
| 1937. |
When current is passed through an electric bulb, its filament glows, but the wire leading current to the bulb does not glow because- |
| A. | Less current flows in the leading wire as compared to that in the filament |
| B. | The leading wire has more resistance than the filament |
| C. | The leading wire has less resistance than the filament. |
| D. | Filament has coating of fluorescent material over it |
| Answer» D. Filament has coating of fluorescent material over it | |
| 1938. |
The fault clearing time of a circuit breaker is usually |
| A. | Few minutes |
| B. | Few seconds |
| C. | One second |
| D. | Few cycles of supply voltage |
| Answer» E. | |
| 1939. |
Pooja makes a simple circuit with one bulb and five cells. The bulb lights for an instant and then goes out. Why? |
| A. | Electricity could not flow through the circuit |
| B. | Too much electricity passed through the bulb filament |
| C. | The wires melted in the heat |
| D. | All of the above |
| Answer» C. The wires melted in the heat | |
| 1940. |
MCB |
| A. | is a device based on heating effect of current |
| B. | is a device based on magnetic effect of current |
| C. | is a switch which automatically turns off when current in it exceeds the safe limit |
| D. | None of these |
| Answer» D. None of these | |
| 1941. |
When electric current flows through a conductor, the conductor becomes |
| A. | liquid |
| B. | vapor |
| C. | hot |
| D. | cold |
| Answer» D. cold | |
| 1942. |
A fuse wire is made up of alloy |
| A. | Nichrome |
| B. | Tin-lead |
| C. | Manganin |
| D. | Constantan. |
| Answer» C. Manganin | |
| 1943. |
Which of the following is an electrical insulator? |
| A. | Aluminium |
| B. | Gold |
| C. | Cork |
| D. | Copper |
| Answer» D. Copper | |
| 1944. |
When the switch of an electric bell is on, then electric current in it |
| A. | flows and stops in succession |
| B. | flows continuously |
| C. | first flows in one direction and after some time in other direction |
| D. | flows in the beginning and then stops Forever |
| Answer» B. flows continuously | |
| 1945. |
In electric fittings, the wires are earthed because: |
| A. | it avoids leakage of electricity |
| B. | in case of short circuit, current passes to the earth |
| C. | it completes the electric current |
| D. | it reduces fluctuation |
| Answer» C. it completes the electric current | |
| 1946. |
Which of the following actions will decrease the strength of the magnetic field of an electromagnet? |
| A. | Using fewer loops of wire per meter in the coil |
| B. | Decreasing the current in the wire |
| C. | Removing the iron core |
| D. | All of the above |
| Answer» E. | |
| 1947. |
One should not connect a number of electric appliances to the same power socket because |
| A. | The appliances will not get full voltage |
| B. | The appliances will not get proper current |
| C. | This can damage the appliances |
| D. | This can damage the dome sting wiring due to overheating |
| Answer» E. | |
| 1948. |
Fuses of |
| A. | Same kind are used for different purposes |
| B. | Different kind are used for different purposes |
| C. | Both the above are correct |
| D. | None of these |
| Answer» C. Both the above are correct | |
| 1949. |
When we switch on an electric bell |
| A. | the flow of electric current through the electromagnet in the bell stops. |
| B. | the current-starts to flow through the electromagnet |
| C. | there occurs a decrease in the voltage of the current flowing through the electromagnet |
| D. | None of the above |
| Answer» C. there occurs a decrease in the voltage of the current flowing through the electromagnet | |
| 1950. |
There is a coil of wire in an electrical iron. This coil of wire is known as |
| A. | component |
| B. | circuit |
| C. | element |
| D. | spring |
| Answer» D. spring | |