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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.
| 1951. |
The magnetic field around a current-carrying coil lasts |
| A. | for a few hours |
| B. | a few minutes |
| C. | for ever |
| D. | for the duration for which current flows through it |
| Answer» E. | |
| 1952. |
Select the one that is a necessary requirement for a wire to be used as a fuse wire |
| A. | a conductor having a low melting point |
| B. | a conductor having a high melting point |
| C. | an insulator having a low melting point |
| D. | an insulator having a high melting point |
| Answer» B. a conductor having a high melting point | |
| 1953. |
Which of the following materials allows electricity to pass through it? |
| A. | Conductor |
| B. | Insulator |
| C. | Rubber |
| D. | Glass |
| Answer» B. Insulator | |
| 1954. |
DIRECTIONS: On the basis of, following diagram / picture answer the questions given below: The picture below shows a shop that caught fire because of a short circuit. Which of the following could have resulted in the fire? A. the shopkeeper used fuses and circuit breakers. B. the shopkeeper bought an energy-saving appliance. C. The shopkeeper did not replace his frayed and damaged wires. D. The shopkeeper plugged too many appliances into one socket. |
| A. | D only |
| B. | A and B only |
| C. | C and D only |
| D. | B, C and D only |
| Answer» D. B, C and D only | |
| 1955. |
DIRECTIONS: On the basis of, following diagram / picture answer the questions given below: In the circuit diagram shown below, the bulb lights up when |
| A. | A is closed. B and C are open |
| B. | A and B are closed but C is open |
| C. | A, B and C are closed |
| D. | Both (b) and (c) |
| Answer» E. | |
| 1956. |
DIRECTIONS: On the basis of, following diagram / picture answer the questions given below: Which one is not a source of electric current? A. B. C. D. |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» E. | |
| 1957. |
DIRECTIONS: On the basis of, following diagram / picture answer the questions given below: In the figure given below, A, B and C are identical bulbs. What changes occur in the brightness of bulbs A and B when the switch S is closed? |
| A. | Brightness of A increases but that of B decreases |
| B. | Brightness of A remains the same but that of B decreases |
| C. | Brightness of both A and B decreases |
| D. | Brightness of both A and B increases |
| Answer» B. Brightness of A remains the same but that of B decreases | |
| 1958. |
DIRECTIONS: On the basis of, following diagram / picture answer the questions given below: What energy changes take place in the figure given here, where a bulb glows with the help of a cell? |
| A. | Electrical\[\to \]light |
| B. | Electrical\[\to \]heat\[\to \]light |
| C. | Chemical\[\to \]electrical\[\to \]heat\[\to \]light |
| D. | Chemical\[\to \]electrical\[\to \]light\[\to \]heat |
| Answer» D. Chemical\[\to \]electrical\[\to \]light\[\to \]heat | |
| 1959. |
DIRECTIONS: On the basis of, following diagram / picture answer the questions given below: Ritu has set up a circuit as shown. What should she put in the position A to make the bulb glow more brightly? |
| A. | Bulb |
| B. | wire |
| C. | Key |
| D. | cell |
| Answer» E. | |
| 1960. |
DIRECTIONS: Read the following two statements carefully and choose the correct options. Statement 1: The heating up of a thin conducting wire on passing an electric current through it is known as heating effect of current. Statement 2: Various electrical appliances that are based on heating effect of current contain a coil of wire called element. |
| A. | Statement (1) is correct while statement (2) is incorrect. |
| B. | Statement (2) is correct while statement (1) is incorrect. |
| C. | Both statements are correct |
| D. | Both statements are incorrect. |
| Answer» C. Both statements are correct | |
| 1961. |
DIRECTIONS: Read the following two statements carefully and choose the correct options. Statement 1: Battery is a combination of two cells only. Statement 2: The positive and negative terminals are generally marked on the cells. |
| A. | Statement (1) is correct while statement (2) is incorrect. |
| B. | Statement (2) is correct while statement (1) is incorrect. |
| C. | Both statements are correct |
| D. | Both statements are incorrect. |
| Answer» C. Both statements are correct | |
| 1962. |
Which of the following does NOT help us save electricity? (i) Switch off the air conditioner and open the refrigerator door to cool the house. (ii) Use the electric iron to iron just one or two clothes at a time. (iii) Connect more than one electric appliance to one power point. |
| A. | Only (i) and (ii) |
| B. | Only (ii) and (iii) |
| C. | Only (i) and (iii) |
| D. | (i),(ii) and (iii) |
| Answer» E. | |
| 1963. |
When an electric current is flowing through a conductor it |
| A. | Experiences a force when it is in a magnetic field |
| B. | Experience no force when it is in a magnetic field |
| C. | Experiences the force only if the field is of electromagnetic nature |
| D. | All of the above |
| Answer» B. Experience no force when it is in a magnetic field | |
| 1964. |
Which of the following is an electrical conductor? |
| A. | Silver |
| B. | Cork |
| C. | Silver-colored plastic |
| D. | Wood |
| Answer» B. Cork | |
| 1965. |
DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 2 We use various appliances based on heating effect of current in our daily life. Some such appliances are electric room heater, electric heater, hot plates, electric iron, hair dryers etc. All these contain a coil of wire called element. The amount of heat produced depends upon which of the following? |
| A. | Material of element |
| B. | Length of wire |
| C. | Thickness of wire |
| D. | all of these |
| Answer» E. | |
| 1966. |
Identify the energy conversions in a closed, working circuit that enables continuous flow of current in it. |
| A. | Electrical to mechanical energy |
| B. | Electrical to chemical energy |
| C. | Mechanical to electrical energy |
| D. | Chemical to electrical energy |
| Answer» E. | |
| 1967. |
Which of the following electrical appliances does NOT use the magnetic effects of current? |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» C. | |
| 1968. |
DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 2 We use various appliances based on heating effect of current in our daily life. Some such appliances are electric room heater, electric heater, hot plates, electric iron, hair dryers etc. All these contain a coil of wire called element. The coil of wire in an electric bulb is known as |
| A. | Element |
| B. | filament |
| C. | Conducting wire |
| D. | none of these |
| Answer» C. Conducting wire | |
| 1969. |
What is an element7 in an electrical appliance essentially made up of? |
| A. | A coil of wire |
| B. | An electromagnet |
| C. | An insulating material |
| D. | A safety device such as a fuse |
| Answer» B. An electromagnet | |
| 1970. |
DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 1 Some common electrical components can be represented by symbols. It is much easier to draw a circuit diagram using symbols. A circuit diagram of an electrical circuit is shown in the figure below. Look at the diagram and answer the questions. The longer horizontal line in A represents which terminal of the cell? |
| A. | Positive terminal |
| B. | Negative terminal |
| C. | Either positive or negative terminal |
| D. | None of these |
| Answer» B. Negative terminal | |
| 1971. |
Which of the following effects of current in an electric bulb gives us light? |
| A. | Heating |
| B. | Magnetic |
| C. | Chemical |
| D. | All of the above |
| Answer» B. Magnetic | |
| 1972. |
DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 1 Some common electrical components can be represented by symbols. It is much easier to draw a circuit diagram using symbols. A circuit diagram of an electrical circuit is shown in the figure below. Look at the diagram and answer the questions. In the diagram, B represents |
| A. | a connecting wire |
| B. | a switch in 'ON' position |
| C. | a switch in 'off? position |
| D. | None of these |
| Answer» C. a switch in 'off? position | |
| 1973. |
Which of these is the symbol for a series combination of cells? |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» B. | |
| 1974. |
DIRECTIONS: Match Column-I with Column-II and select the correct answer using the codes given below the columns. Column - I Column - II (A) CFL (p) A safety device to prevent electric appliances (B) ISI (q) The wire used in heater to get heat (C) Switch (r) Consume less energy than bulb (D) Fuse (s) Appliance is safe to use (E) Element (t) Turns the circuit ON or OFF |
| A. | A\[\to \] (s), B\[\to \] (t), C\[\to \] (r), D\[\to \] (q), E\[\to \] (p) |
| B. | A\[\to \] (r), B\[\to \] (s), C\[\to \] (t), D\[\to \] (p), E\[\to \] (q) |
| C. | A\[\to \] (q), B\[\to \] (r), C\[\to \] (p), D\[\to \] (s), E\[\to \] (t) |
| D. | A\[\to \] (t), B\[\to \] (p), C\[\to \] (s), D\[\to \] (q), E\[\to \](r) |
| Answer» C. A\[\to \] (q), B\[\to \] (r), C\[\to \] (p), D\[\to \] (s), E\[\to \] (t) | |
| 1975. |
Which of the following objects make use of an electromagnet? |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» E. | |
| 1976. |
DIRECTIONS: Match Column-I with Column-II and select the correct answer using the codes given below the columns. Column-I Column-II (A) Electric cell (p) (B) Electric bulb (q) (C) Battery (r) (D) Switch (s) |
| A. | A\[\to \] (p), B\[\to \] (q), C\[\to \] (r), D\[\to \] (s) |
| B. | A\[\to \] (q), B\[\to \] (p), C\[\to \] (r), D\[\to \] (s) |
| C. | A\[\to \] (p), B\[\to \] (q), C\[\to \] (s), D\[\to \] (r) |
| D. | A\[\to \] (q), B\[\to \] (p), C\[\to \] (s), D\[\to \] (r) |
| Answer» C. A\[\to \] (p), B\[\to \] (q), C\[\to \] (s), D\[\to \] (r) | |
| 1977. |
Which of the following statements is correct of a switch? |
| A. | It allows the flow of electricity. |
| B. | It controls the brightness of a bulb. |
| C. | It controls the power of the batteries. |
| D. | It fuses a bulb. |
| Answer» B. It controls the brightness of a bulb. | |
| 1978. |
Which mark is necessary on electrical appliances? |
| A. | ISI |
| B. | HCCI |
| C. | AGMARK |
| D. | KSK |
| Answer» B. HCCI | |
| 1979. |
Select the one in which heating effect of current is not used. |
| A. | Electric iron |
| B. | Electric immersion heater |
| C. | Electric geyser |
| D. | A battery |
| Answer» E. | |
| 1980. |
Why does a bulb not glow when its filament is broken? |
| A. | the bulb is showing the heating effect but it does not glow. |
| B. | the circuit is broken |
| C. | both the above |
| D. | None of these |
| Answer» C. both the above | |
| 1981. |
Which of the following is the advantage of an accumulator over a dry cell? |
| A. | An accumulator is leak proof. |
| B. | An accumulator is cheap. |
| C. | An accumulator is rechargeable. |
| D. | An accumulator is portable. |
| Answer» D. An accumulator is portable. | |
| 1982. |
Element refers to |
| A. | the coil of wire used in various electrical appliances based on heating effect of current |
| B. | the coil of wire used in various electrical appliances based on magnetic effect of current |
| C. | both the above |
| D. | None of these |
| Answer» B. the coil of wire used in various electrical appliances based on magnetic effect of current | |
| 1983. |
Identify the substance that is easy to magnetize and demagnetize? |
| A. | Steel |
| B. | Cobalt |
| C. | Soft iron |
| D. | AInico |
| Answer» D. AInico | |
| 1984. |
Which of the following effects of electric current is made use of in the figure shown below? |
| A. | Heating |
| B. | Magnetic |
| C. | Chemical |
| D. | All of the above |
| Answer» B. Magnetic | |
| 1985. |
Fuse |
| A. | is a safety device which prevents damage to electric circuits and possible fire. |
| B. | is made up of an insulating material to avoid electric shocks. |
| C. | is a device which is used to measure the flow of electric current through a circuit. |
| D. | All of the above |
| Answer» B. is made up of an insulating material to avoid electric shocks. | |
| 1986. |
It is present in an electric bulb and glows when electric current is switched on. It is |
| A. | a bulb |
| B. | a filament |
| C. | an element |
| D. | a coil |
| Answer» C. an element | |
| 1987. |
Which of the following does NOT produce electrical energy? |
| A. | Generator |
| B. | Motor |
| C. | Battery |
| D. | Cell |
| Answer» C. Battery | |
| 1988. |
Which of the following electrical appliances does not have a heating element? |
| A. | Electric cooker |
| B. | Electric toaster |
| C. | Electric fan |
| D. | Soldering iron |
| Answer» D. Soldering iron | |
| 1989. |
A house-owner replaces a failed fuse for the lights of the house. When the lights are switched on, the second fuse also fails. The house-owner then uses a third fuse with a higher rating than the previous two. Why is this not a sensible thing to do? |
| A. | Fuses only allow the circuit to work if the rating is exactly right. |
| B. | The third fuse will melt because the rating is too high. |
| C. | Using a fuse with too high rating cause?s electric shocks. |
| D. | The circuit may work, but the fault is not corrected. |
| Answer» E. | |
| 1990. |
The figure below is the symbol of: |
| A. | closed plug key |
| B. | cell |
| C. | variable resistance |
| D. | open plug key |
| Answer» E. | |
| 1991. |
Which of the following is NOT true about a series circuit? |
| A. | All the bulbs glow when the circuit is closed. |
| B. | If any one of the bulbs gets fused, then the other bulbs also stop glowing. |
| C. | The bulbs do not glow brightly. |
| D. | All the bulbs glow independently. |
| Answer» E. | |
| 1992. |
Study of relationship between electricity and magnetism is called |
| A. | Current electricity |
| B. | Electric magnetism |
| C. | Magneto electricity |
| D. | Electromagnetism |
| Answer» E. | |
| 1993. |
How are bulbs in our houses connected? |
| A. | In parallel |
| B. | In series |
| C. | Both in series and in parallel |
| D. | Same times in series and sometimes in parallel. |
| Answer» B. In series | |
| 1994. |
Read the given statements and select the correct option. Statement 1: In a circuit, surface of the bulb becomes warmer than the connecting wires when the same current flows through them. Statement 2: A thin and long wire has higher resistance than a thick and short wire. |
| A. | Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. |
| B. | Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. |
| C. | Statement 1 is true and statement 2 is false. |
| D. | Statement 2 is true and statement 1 is false. |
| Answer» C. Statement 1 is true and statement 2 is false. | |
| 1995. |
A battery consists of |
| A. | only one cell |
| B. | only two cells |
| C. | two or more cells |
| D. | All of the above |
| Answer» D. All of the above | |
| 1996. |
The symbol of a cell is given as. What does the shorter/thicker vertical line in the symbol of a cell represent? |
| A. | The positive terminal |
| B. | The negative terminal |
| C. | The direction of current |
| D. | All of the above |
| Answer» C. The direction of current | |
| 1997. |
When electricity is passed through a coil |
| A. | Magnetic field is produced |
| B. | Heat is developed in the coil |
| C. | Energy is lost in the form of heat |
| D. | All the above |
| Answer» E. | |
| 1998. |
Why is electrical wiring usually made of copper but not silver? |
| A. | Copper is a better conductor than silver. |
| B. | Copper is a better insulator than silver. |
| C. | Copper is less expensive than silver. |
| D. | Copper is non-magnetic than silver. |
| Answer» D. Copper is non-magnetic than silver. | |
| 1999. |
Which of the following statements about an electromagnet is NOT true? |
| A. | Insulated wire is wound around it. |
| B. | It works only in the presence of electricity. |
| C. | It is used in fans and radio. |
| D. | It is a permanent magnet. |
| Answer» E. | |
| 2000. |
The primary cell which is used in daily life is |
| A. | Leclanche cell |
| B. | Dry cell |
| C. | Daniel cell |
| D. | Simple voltaic cell |
| Answer» C. Daniel cell | |