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. The alpha radiation is not used in radiotherapy because:
[A] It is an ionizing radiation
[B] It is unable to penetrate human skin
[C] It is toxic to human tissues
[D] It is not cost effective

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2. A projectile will achieve maximum horizontal range at which angle?
[A] 90°
[B] 60°
[C] 45°
[D] 30°

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3. Which of the following is an example of application of force?
[A] when a body at rest starts moving
[B] when a moving body stops
[C] when moving body changes its direction
[D] All of the above

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4. Which of the following is NOT correct about units of work:
[A] 1 joule = 107 ergs
[B] 1 kg-m = 1 joule
[C] 1 kg-m = 9.8 joule
[D] 1 joule = 1 Nm

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5. What is the relation between the orbital velocity and the radius of the orbit for a given planet?
[A] greater the radius of orbit, lesser will be the orbital velocity
[B] greater the radius of orbit, greater will be the orbital velocity
[C] orbital velocity is independent of radius of orbit
[D] None of the above

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6. What is the force that is required to produce unit elongation in a wire known as?
[A] Bulk modulus
[B] Thermal strain
[C] Thermal stress
[D] Force constant

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7. What is the order of distance for interatomic forces to be active?
[A] 10–7 metre
[B] 10–8 metre
[C] 10–9 metre
[D] 10–10 metre

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8. Which of the following represents Pressure?
[A] Force/Density
[B] Force x Area
[C] Force/Area
[D] Force/ Acceleration

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9. What do we call the potential energy of surface molecules per unit area of the surface?
[A] Surface energy
[B] Surface Tension
[C] Reynolds number
[D] Potential constant

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10. What is the SI unit of viscosity?
[A] candela
[B] poiseiulle
[C] Newton/m
[D] No units

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