Physics MCQs

Physics Objective (Multiple Choice) General Knowledge & General Science Questions & Answers for SSC-CGL, UPPSC, NDA, CDS and all one day examinations of India.

1. A train travels at the speed of 180 km/hr. What is its speed in m/s?
[A] 5 m/s
[B] 30 m/s
[C] 40 m/s
[D] 50 m/s

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2. How the brain interprets the frequency of an emitted sound is called its __:
[A] Pitch
[B] Amplitude
[C] Intensity
[D] Timbre

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3. Two pieces of ice at 0°C would freeze together if pressed against each other and then released. In this context, which among the following is the correct principle in action in this?
[A] The melting point of pure ice decreases with pressure.
[B] The melting point of pure ice increases with Pressure
[C] The melting point of pure ice first increases, then decreases with pressure
[D] The melting point of pure ice first decreases then increases with pressure

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4. Echoes are heard when we shout in an empty hall. But when the hall is full of people no echoes are heard why?
[A] Echoes are subdued in the noise of people
[B] Soft clothes of people absorb sound instead of reflecting it
[C] Destructive interference of sound takes place
[D] Excessive reverberations take place

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5. Which of the following laws state that the orbits of the planets are ellipses, with the Sun at one focus of the ellipse?
[A] Kepler’s First law
[B] Kepler’s Second law
[C] Kepler’s Third law
[D] None of the above

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6. Which of the following is NOT an application of principle of floatation?
[A] Ships
[B] Balloons
[C] Submarines
[D] None of the above

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7. In which of the following positions is the potential energy minimum in S.H.M?
[A] Extreme position
[B] Mean position
[C] can be at extreme or mean position
[D] None of the above

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8. By what phase angle the velocity is ahead of displacement in S.H.M?
[A] π
[B] π/4
[C] π/2
[D] 2π

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9. What is the direction of electric and magnetic fields in an electromagnetic wave?
[A] parallel to each other
[B] perpendicular to each other
[C] at 45° to each other
[D] at 120° to each other

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10. Which of the following is correct about compressions in sound wave?
[A] compressions are regions of low pressure and low density
[B] compressions are regions of high pressure and low density
[C] compressions are regions of high pressure and high density
[D] compressions are regions of low pressure and high density

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