General Science - 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. These questions are part of GKToday’s 35000+ MCQs Bank Course in GKToday Android App

11. Sound velocity is usually larger in solids than in liquids and gases because:

[A] solids are more elastic than liquids and gases
[B] solids are less elastic than liquids and gases
[C] volumetric expansion coefficients of liquids and gases are higher than solids
[D] frequency of sound waves decreases in solids due to Doppler shift

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12. Consider the following differences between White Gold and Yellow Gold:

  1. While White Gold has more Nickel, Yellow Gold usually contains more Zinc
  2. White Gold are more durable than Yellow Gold

Which of the above statements is/are correct?

[A] Only 1
[B] Only 2
[C] Both 1 & 2
[D] Neither 1 nor 2

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13. Li-Fi (Light Fidelity):

  1. is a fast and cheap optical version of WiFi
  2. is based on LEDs for the transfer of data
  3. works only in direct line of sight

Which of the above statements is/are correct?

[A] Only 1 & 2
[B] Only 2 & 3
[C] Only 1 & 3
[D] 1, 2 & 3

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14. The magnetic lines of force:
1. are closed continuous curves
2. travel from north to south outside the magnet and from south to north inside the magnet
3. bend along the length of magnet
4. mutually repel each other
5. never intersect each other
Which among the above is / are correct?

[A] Only 1 & 2
[B] Only 1, 2 & 3
[C] Only 1, 2, 3 & 5
[D] 1, 2, 3, 4 & 5

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15. When a body is in Uniform Circular Motion, there is no change in ___:
1. Speed
2. Amplitude
3. Velocity
4. Acceleration
Choose the correct option from the codes given below:

[A] Only 1
[B] Only 1 & 2
[C] Only 1, 2 & 3
[D] 1, 2, 3 & 4

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16. Who among the following is credited to work for the unification of electricity, magnetism and optics field of Physics?

[A] James Clerk Maxwell
[B] Michael Faraday
[C] Haris Christian Oersted
[D] Isaac Newton

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17. Optical Fibre technology works on which of these principles of Physics?

[A] Bernoulli’s Principle
[B] Newton’s law of Motion
[C] Total internal reflection of Light
[D] Photoelectric effect

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18. Which of the following scientific discoveries was made by C.V Raman?

[A] Inelastic scattering of light by molecules
[B] Super Conductivity
[C] Controlled nuclear fission
[D] Cyclotron

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19. 1 nautical mile is equivalent to which of the following?

[A] 1.44 x 1000 m
[B] 1.852 x 100 m
[C] 1.852 x 1000 m
[D] 1.44 x 100 m

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20. What is the S.I unit of Pressure Energy?

[A] Nm
[B] Watt
[C] Joule
[D] No units

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