General Science - Physics MCQs

Physics Objective (Multiple Choice) General Knowledge & General Science Questions & Answers for SSC-CGL, UPPSC, UPSC, NDA, CDS and UPSC Civil Services Prelims Examinations.

1. Among Alpha, Beta and Gamma radiations:
1. The Alpha Particles have highest ionising power but least penetrating power
2. The Gamma radiations have highest penetration power but lowest ionising power
Which among the above is / are correct statements?

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

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2. Consider the following:
1. Formation of a rainbow
2. Dispersion of light,
3. A coin appears raised when placed in a trough filled with water
Which among the above refraction?

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

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3. Consider the following types of images:
1. Real, inverted and highly diminished image
2. Real, inverted and enlarged image
3. Virtual, erect and enlarged image
4. Virtual erect and diminished image
Which among the above is / are formed by convex lens?

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

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4. With reference to the mobile telephony, the USSD technology is increasingly being adopted in recent times for various services. How the USSD is different from SMS ?
1. While USSD maintains a continuous session so that users receive immediate response, SMS service can’t involve a continuous session
2. While per message length in USSD is 182 alphanumeric characters, it 160 alphanumeric characters for SMS
Choose the correct option from the codes given below:

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

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5. Which among the following keep changing for a body in uniform circular motion?
1. Speed
2. Amplitude
3. Velocity
4. Acceleration
Choose the correct option from the codes given below:

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

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6. Which among the following is / are correct statements?
1. The images produced by Concave Mirrors are always real images
2. The images produced by Flat Mirrors are always virtual images
3. Converging Lens can produce virtual as well as real images
Select the correct option from the codes given below:

[A] Only 1 is correct
[B] Only 2 is correct
[C] Only 1 & 2 are correct
[D] Only 2 & 3 are correct

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7. What is / are the objectives of using tubeless tyres in the aircrafts?
1. To reduce chances of detatching the tyre from the rim
2. To make them withstand shocks better
3. To allow them withstand heat Select the correct option from the codes given below:

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

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8. The X-ray crystallography mainly uses which among the following properties of electromagnetic radiation?

[A] Reflection
[B] Diffraction
[C] Interference
[D] Refraction

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9. While passing over an obstacle a light ray slightly bends round the corner. The phenomenon is known as__:

[A] Scattering
[B] Polarisation
[C] Diffraction
[D] Refraction

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10. Total Internal Reflection would happen only if __:

  1. A ray travels from denser to rarer medium
  2. A ray travels from rarer to denser medium
  3. The angle of incidence in denser medium is greater than the critical angle
  4. The angle of incidence in rarer medium is greater than the critical angle

Select the correct option from the codes given below:

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

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