Physics Questions and Answers updated daily – General Knowledge



96 Physics Questions and answers section with explanation for various online exam preparation, various interviews, General Knowledge Physics online test. Physics Questions with detailed description, explanation will help you to master the topic.

Physics Questions

1. Which principle states that when a body is partially or totally immersed in a fluid, it experiences an upward thrust equal to the weight of the fluid displaced by it ______________



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Correct Ans:Archimedes'
Explanation:


2. Newton is a unit of



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Correct Ans:Force
Explanation:


3. Cream gets separated from milk when it is churned because of ___________



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Correct Ans:Centrifugal force
Explanation:


4. An object is placed at the focus of a concave mirror. The image will be



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Correct Ans:real, inverted, highly enlarged at infinity
Explanation:


5. A current I flows through a potential difference V in an electrical circuit containing a resistance R. The product of V and I, i.e., VI may be understood as



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Correct Ans:heat generated by the circuit
Explanation:


6. A particle is moving freely. Then its



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Correct Ans:Kinetic energy is always greater than zero
Explanation:


7. Gravitational force shares a common feature with electromagnetic force. In both cases, the force is ______________



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Correct Ans:Between massive and neutral objects
Explanation:


8. The spread in colours in a rainbow on sky is primarily due to



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Correct Ans:Dispersion of sunlight
Explanation:


9. The displacement of a particle is given by x = cos2 wt. The motion is _____________



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Correct Ans:periodic but not simple harmonic
Explanation:


10. A motor vehicle is moving on a circle with a uniform speed. The net acceleration of the vehicle is



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Correct Ans:Towards the centre of the circle.
Explanation:


11. An object is undergoing accelerated motion. Its rate of change in momentum is



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Correct Ans:zero
Explanation:


12. Magnetic Resonance Imaging (MRI) is used in medical diagnosis to obtain images of our internal body organs. This is primarily possible because



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Correct Ans:MRI uses an external magnet to generate a magnetic field in our body.
Explanation:


13. An ant is moving on thin (negligible thickness) circular wire. How many coordinates do you require to completely describe the motion of the ant?



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Correct Ans:Three
Explanation:


14. A current-carrying wire is known to produce magnetic lines of force around the conducting straight wire. The direction of the lines of force may be described by



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Correct Ans:Right-hand thumb rule for both up and down currents.
Explanation:


15. If an object undergoes a uniform circular motion, then its



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Correct Ans:acceleration remains uniform
Explanation:


16. A force F is applied on a body (which moves on a straight line) for a duration of 3s. The momentum of the body changes from 10g cm/s to 40 g cm/s. The magnitude of the force F is



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Correct Ans:10 dynes
Explanation:


17. Specific gravity of silver is 11 and specific gravity of iron is 8. Which one among the following is the approximate relative of silver with respect to iron?



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Correct Ans:1.4
Explanation:


18. A positively charged particle projected towards west is deflected towards north north by a magnetic field. The direction of the magnetic field is



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Correct Ans:towards south
Explanation:


19. Metal used to make wires for safety fuses must have



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Correct Ans:high resistivity and low melting point
Explanation:


20. A car is moving with a uniform speed. However its momentum is changing. Then the car



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Correct Ans:may be on an elliptical path
Explanation:





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