MCQOPTIONS
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MCQOPTIONS
This section includes 2016 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge knowledge and support exam preparation. Choose a topic below to get started.
| 751. |
Four 100 Ω resistors are connected in parallel and this combination is connected across a 100 V supply voltage. Find the power dissipation in each resistor. |
| A. | 100 W |
| B. | 200 W |
| C. | 400 W |
| D. | 300 W |
| Answer» B. 200 W | |
| 752. |
If a box of mass 25 kg is pushed 15 m by a force of ‘F’ N, work done in the process is 480 J. Find F: |
| A. | 50 |
| B. | 32 |
| C. | 16 |
| D. | 25 |
| Answer» C. 16 | |
| 753. |
________ is the matter or substance through which sound is transmitted. |
| A. | Interface |
| B. | Medium |
| C. | Environment |
| D. | Surrounding |
| Answer» C. Environment | |
| 754. |
During oxidation process electrons are ________. |
| A. | Gained |
| B. | Lost |
| C. | Paired up |
| D. | None of the option is correct. |
| Answer» C. Paired up | |
| 755. |
At which temperature are Fahrenheit and Celsius equal? |
| A. | -20 |
| B. | -30 |
| C. | -10 |
| D. | -40 |
| Answer» E. | |
| 756. |
An object is moving linearly with a uniform velocity. If time is represented along X-axis then which of the following statements is correct? |
| A. | The distance-time graph of the motion will be a straight line parallel to X-axis. |
| B. | The velocity-time graph of the motion will be a straight line parallel to Y-axis. |
| C. | The distance-time graph of the motion will be a straight line parallel to Y-axis. |
| D. | The velocity-time graph of the motion will be a straight line parallel to X-axis. |
| Answer» E. | |
| 757. |
Law of buoyancy was discovered by ? |
| A. | Archimedes |
| B. | Edwin Hubble |
| C. | Pierre Simon De Laplace |
| D. | J J Thompson |
| Answer» B. Edwin Hubble | |
| 758. |
Consider the following statements:a. The whistle of a passing train is clearly heard on a quiet misty night.b. Velocity of sound in air is proportional to the humidity in air.Which of the above statements are true? |
| A. | a and b both are correct |
| B. | Neither a nor b is correct |
| C. | a is correct but b is not |
| D. | b is correct but a is not |
| Answer» B. Neither a nor b is correct | |
| 759. |
______ is used in periscope. |
| A. | Plane mirror |
| B. | Prism |
| C. | Concave lens |
| D. | Convex lens |
| Answer» B. Prism | |
| 760. |
In negative acceleration, the velocity of a body ________. |
| A. | remains constant |
| B. | is zero |
| C. | decreases |
| D. | increases |
| Answer» D. increases | |
| 761. |
In about 5 billion years the sun’s core will be largely consisting of ____________. |
| A. | helium |
| B. | lithium |
| C. | hydrogen |
| D. | protons |
| Answer» B. lithium | |
| 762. |
In a galvanic cell, the half-cell in which oxidation takes place is called ______ and it has a negative potential with respect to the solution. |
| A. | anode |
| B. | diode |
| C. | triode |
| D. | cathode |
| Answer» B. diode | |
| 763. |
A thin wire that gives off light from the bulb is called ______. |
| A. | Terminal |
| B. | Tip |
| C. | Source |
| D. | Filament |
| Answer» E. | |
| 764. |
In case of hypermetropia, where is the image formed? |
| A. | In front of the retina |
| B. | On the retina |
| C. | Behind the retina |
| D. | On the cornea |
| Answer» D. On the cornea | |
| 765. |
Internal forces ________. |
| A. | are always balanced |
| B. | are always equal |
| C. | may or may not be balanced |
| D. | are never balanced |
| Answer» B. are always equal | |
| 766. |
I-V graph for a (conductor) metallic wire at two temperatures T1 and T2 is shown in the figure, then - |
| A. | T1 > T2 |
| B. | T2 > T1 |
| C. | T1 = T2 |
| D. | Cannot be determined from this graph. |
| Answer» C. T1 = T2 | |
| 767. |
In an electric circuit, Rheostat is often used to change the ________ in the circuit. |
| A. | temperature |
| B. | resistance |
| C. | electric current |
| D. | potential difference |
| Answer» C. electric current | |
| 768. |
Find the energy possessed by a stationary object at a height of 6 m and with a mass of 50 kg. (g = 10m/s2) |
| A. | 3000 J |
| B. | 3 × 104 J |
| C. | 300 J |
| D. | 30 J |
| Answer» B. 3 × 104 J | |
| 769. |
If Boron has two isotopes one of 10u and the other 11u and the average mass of boron atom is 10.8u, then the ratio of abundance of the two isotopes of masses 10u and 11u is _______. |
| A. | 1/4 |
| B. | 4/1 |
| C. | 3/1 |
| D. | 1/3 |
| Answer» B. 4/1 | |
| 770. |
Find the acceleration (in m/s2) produced in a body of mass 3 kg when a force of 6N is applied do it. |
| A. | 18 |
| B. | 4 |
| C. | 2 |
| D. | 36 |
| Answer» D. 36 | |
| 771. |
Radioactivity is a property of |
| A. | Atomic nuclei |
| B. | Excited electron |
| C. | Gamma rays |
| D. | Ultraviolet light |
| Answer» B. Excited electron | |
| 772. |
Integrated Circuits are made up of which of the following? |
| A. | Aluminum |
| B. | Silicon |
| C. | Glass |
| D. | Iron |
| Answer» C. Glass | |
| 773. |
A 50 g block of copper is heated from 20°C to 60°C. How much heat is transferred to the block (specific heat of copper 386 Jkg-1 K-1) |
| A. | 320 J |
| B. | 772 J |
| C. | 852 J |
| D. | 572 J |
| Answer» C. 852 J | |
| 774. |
Ozone at the higher level of the atmosphere is a product of ______ acting on oxygen molecules. |
| A. | gamma rays |
| B. | x-rays |
| C. | IR radiation |
| D. | UV radiation |
| Answer» E. | |
| 775. |
An electric motor converts : |
| A. | Mechanical energy into electrical energy. |
| B. | Electrical energy into mechanical energy. |
| C. | Heat energy into mechanical energy. |
| D. | Eddy currents energy into mechanical energy. |
| Answer» C. Heat energy into mechanical energy. | |
| 776. |
Electrical conductance through metals is called electronic conductance and it ______. |
| A. | decreases with increase in temperature |
| B. | increases with increase in temperature |
| C. | decreases with decrease in temperature |
| D. | does not depend on temperature |
| Answer» B. increases with increase in temperature | |
| 777. |
It is hotter at the same distance over the top of a fire than it is on the side of it, mainly because |
| A. | heat is radiated upwards |
| B. | air condenses hear upwards |
| C. | convection takes more heat upwards |
| D. | conduction, convection and radiation all contribute significantly in transferring hear upwards |
| Answer» D. conduction, convection and radiation all contribute significantly in transferring hear upwards | |
| 778. |
How many isotopes does hydrogen have? |
| A. | 2 |
| B. | 1 |
| C. | 3 |
| D. | 0 |
| Answer» D. 0 | |
| 779. |
A car undergoes a uniform circular motion.The acceleration of the car is |
| A. | zero |
| B. | a non-zero constant |
| C. | a non-zero but not a constant |
| D. | None of the above |
| Answer» D. None of the above | |
| 780. |
Consider a hypothetical planet whose mass and radius are both half that of Earth. If g is the acceleration due to gravity on the surface of Earth, the acceleration due to gravity on the planet will be: |
| A. | g |
| B. | g/2 |
| C. | 2g |
| D. | g/4 |
| Answer» D. g/4 | |
| 781. |
An iron ball and a wooden ball of the same radius are released from a height H in a vacuum. The times taken by both of them to reach the ground are |
| A. | Different |
| B. | Unequal |
| C. | Exactly equal |
| D. | Exactly not equal |
| Answer» D. Exactly not equal | |
| 782. |
Find the potential energy gained by a body of mass 50 kg, if it is raised by 10 m. (use g = 10 m/s2) |
| A. | 50 |
| B. | 5000 |
| C. | 2500 |
| D. | 25 |
| Answer» C. 2500 | |
| 783. |
______ is the instrument for measuring wind force. |
| A. | Hygrometer |
| B. | Salinometer |
| C. | Anemometer |
| D. | Bolometer |
| Answer» D. Bolometer | |
| 784. |
Neutrons were discovered by |
| A. | James Chadwick |
| B. | Ernest Rutherford |
| C. | J. J. Thomson |
| D. | John Dalton |
| Answer» B. Ernest Rutherford | |
| 785. |
If the reflecting surface of a spherical mirror is curved inwards, it is called ________ mirror. |
| A. | Convex |
| B. | Concave |
| C. | Plane |
| D. | Plano Convex |
| Answer» C. Plane | |
| 786. |
Plane mirror makes a/an __________. |
| A. | inverted image of the object |
| B. | enlarged image of the object |
| C. | real image of the object |
| D. | erect image of the object |
| Answer» E. | |
| 787. |
In Alternating Current (AC), the direction and magnitude of the current varies |
| A. | Randomly |
| B. | Periodically |
| C. | Exponentially |
| D. | Do not vary |
| Answer» C. Exponentially | |
| 788. |
If the acceleration due to gravity on the surface of earth is g, then the acceleration due to gravity on the surface of a planet whose mass is same as that of earth and radius is twice as that of earth is ___________. |
| A. | g/4 |
| B. | g/2 |
| C. | 4g |
| D. | 2g |
| Answer» B. g/2 | |
| 789. |
Calculate the mass defect in (in u) an atom of of 4He2 atomic mass 4.002602 u. (masses of neutron, proton and electron are 1.00866 u, 1.00727 u and 0.00055 u respectively). |
| A. | 0.030357 |
| B. | 0.060715 |
| C. | 0.091073 |
| D. | 0.015178 |
| Answer» B. 0.060715 | |
| 790. |
A ray of light passing through the optical centre of a concave lens emerge after refraction will be- |
| A. | Through the principal focus |
| B. | Without any deviation |
| C. | Parallel to the principal axis |
| D. | Through the centre of curvature |
| Answer» C. Parallel to the principal axis | |
| 791. |
A bullet of mass 12 g is fired from a rifle. The bullet takes 0.006 seconds to move through its barrel and leaves it with a velocity of 300 m/s. What is the force exerted on the bullet by the rifle? |
| A. | 180 N |
| B. | 900 N |
| C. | 720 N |
| D. | 600 N |
| Answer» E. | |
| 792. |
If the work done by an elevator is 1000 J with a constant force of 200 N, then the distance covered by elevator is: |
| A. | 0.2 m |
| B. | 2 m |
| C. | 1 m |
| D. | 5 m |
| Answer» E. | |
| 793. |
In the symbol for the electric cell, the thicker, shorter line represents the: |
| A. | Positive terminal |
| B. | Negative terminal |
| C. | Neutral terminal |
| D. | Ring terminal |
| Answer» C. Neutral terminal | |
| 794. |
An object having a mass ‘m’ moving with a velocity ‘v’ possesses a kinetic energy ‘K’. if its velocity is doubled, its kinetic energy will become: |
| A. | K/2 |
| B. | 2K |
| C. | 4K |
| D. | K/4 |
| Answer» D. K/4 | |
| 795. |
A galvanometer is used to ________ |
| A. | detect the direction of light |
| B. | detect the direction of current |
| C. | detect the direction of magnetic induction |
| D. | detect the direction of sound |
| Answer» C. detect the direction of magnetic induction | |
| 796. |
If the object is placed between infinity and optical centre O of the concave lens, how will the image be formed after refraction? |
| A. | Diminished |
| B. | Point size |
| C. | Of same size |
| D. | Enlarged |
| Answer» B. Point size | |
| 797. |
A body starts from rest. Its displacement is proportional to _________ when its acceleration is constant. |
| A. | time squared |
| B. | velocity |
| C. | work |
| D. | time |
| Answer» B. velocity | |
| 798. |
Kilowatt is a unit to measure _____. |
| A. | Current |
| B. | Work |
| C. | Speed |
| D. | Power |
| Answer» E. | |
| 799. |
Calculate the time period (in seconds) of a sound wave of wavelength 4 m travelling with a speed of 500 m/s. |
| A. | 2000 |
| B. | 0.016 |
| C. | 1000 |
| D. | 0.008 |
| Answer» E. | |
| 800. |
After long periods of use, a grey spot develops on the inside of a bulb. This is because |
| A. | he tungsten filament evaporates and collects there |
| B. | he heat of the bulb scorches the glass at the top |
| C. | ust inside the bulb condenses on the top |
| D. | lass undergoes a change due to the heat |
| Answer» D. lass undergoes a change due to the heat | |