Question # 1

Which of the following particle would experience the largest magnetic force when projected with the same velocity perpendicular to a magnetic field?

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Proton

Electron

He⁺

Li⁺

Shunt required in an ammeter of resistance R to decrease its deflection from 30 ampere to 10 ampere is

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R/4

R/3

R/2

R

Two bodies of masses m₁ and m₂ have equal momentum their kinetic energies E₁ and E₂ are in the ratio

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√m₁ : √m₂

m₁: m₂

m₂: m₁

m₁² : m₂²

In a Millikan's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10-19 C. The number of excess electrons on the drop is

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3.9

4

4.2

6

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

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Any angle between 0 and ±π/2

π/2

π

Any angle between 0 and π/2

In case of p-n junction diode at high value of reverse bias the current rises sharply The value of reverse bias is known as

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Cut off voltage

Zener voltage

Inverse voltage

Critical voltage

If two non-zero vector ̅A̅ and ̅B are parallel to each other, then ̅A̅, ̅B is equal to

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Zero

AB

A + B

A - B

The motion without consideration of its cause is studied in:

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Kinematics

Mechanics

Statics

Modern Physics

For production of beats the two sources must have

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Different frequencies and same amplitude

Different frequencies

Different frequencies same amplitude and same phase

Different frequencies and same phase.

A sun rise or sun set, the sun looks reddish because.

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The sun is coldest at these times

Of the effects of reflection and refraction

The sun is hottest at these times

Of the scattering of light

Who explained the origin of the Fraunhofer lines?

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Fraunhoffer

Kirchhoff

Fresnel

Snell

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NAT I Computer Science Physics MCQs With Answers

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