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NAT I Medical Physics MCQs With Answers

Question # 1

In LCR series AC circuit the phase angle between current and voltage is

Choose an answer

Any angle between 0 and ±π/2

π/2

Any angle between 0 and π/2

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Question # 2

What will be the duration of the day and night (in hour) if the diameter of the earth is suddenly reduced to half its original value the mass remaining constant?

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Question # 3

Planck's constant has the dimensions of:

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Energy

Momentum

Frequency

Angular momentum

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Question # 4

The dot product of two vectors is negative when

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They are parallel vectors

They are anti-parallel vectors

They are perpendicular vectors

None of the above is correct

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Question # 5

The half life of a radio-isotope is 5 years The fraction of atoms decayed in this substance after 15 years will be

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3/4

7/8

5/8

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Question # 6

If in a moving coil galvanometer a current 1 produces a deflection θ then

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i ∞ tan θ

i ∞ θ²

i ∞ θ

i ∞ √θ

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Question # 7

Which of the following four statements is false?

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A body can have zero velocity and still be accelerated

A body can have a constant velocity and still have a varying speed

A body can have a constant speed and still have a varying velocity

The direction of the velocity of a acceleration is constant

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Question # 8

Band spectrum in produced by

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H₂

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Question # 9

The dimensional formula of toque is:

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[ML²T²]

[MLT²]

[ML^-1T^-2]

[ML^-2T^-2]

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