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. Consider the following regarding the differences between ‘holography’ and ‘photography’:

  1. When a photograph is cut in half, each piece shows half of the scene. When a hologram is cut in half, the whole scene can still be seen in each piece.
  2. A lens is required in photography to record the image, whereas in holography, the light from the object is scattered directly onto the recording medium.

Select the statement(s) which is/are correct?

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

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2. Which of the following is / are correct statements with respect to the image formed in a plane mirror?  

  1. Image is always virtual
  2. The distance of image from the mirror is same as the distance between object and mirror
  3. Image is laterally inverted

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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3. 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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4. 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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5. Which among the following is / are correct statements:
1. A sail boat can be propelled by air blown at the sail from a big fan attached to the boat
2. All type of waves exhibit diffraction
3. Potatoes, maize, barley, rice can be used for commercial production of Ethanol
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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6. The speed of the sound increases when there is an increase in the
1. temperature
2. moisture
Select 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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7. Ultrasounds are used extensively in industries and for medical purposes. Which among the following is / are applications of Ultrasound?

  1. Detect cracks and flaws in metal blocks
  2. Echocardiography
  3. Treatment of Kidney stones
  4. Cleaning of odd shaped objects

Select the correct option from the codes given below:

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

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8. Which among the following statements with reference to Rainbow is / are correct?
1. One can see Rainbow during Rain showers as well as Snow showers
2. The peak of the arc of Rainbow is generally located within 5 kilometres from earth
Choose the correct option from the codes given below:

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

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9. What is the time taken by the earth to complete one rotation about its axis with regard to a fixed star?

[A] Sidereal day
[B] Solar day
[C] Shake
[D] Tropical year

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10. Which one of the following has ‘ohm’ as its unit?

[A] Resistivity
[B] Conductivity
[C] Conductance
[D] Inductive Reactance

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