Question # 1

To get a resultant displacement of 10 m, two displacement vectors of magnitude 6 m and 8 m should be combined

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Parallel

Antiparallel

At angle 60°

Perpendicular to each other

As the electron in Bohr orbit of hydrogen atom passes from stat n = 2 to n = 1 the kinetic energy K and potential energy U change as

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K two-fold,U also two-fold

K four-fold,U also four-fold

K four-fold,U two-fold

To make the frequency double of na oscillator we have to

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Double the mass

Half the mass

Quadruple the mass

Reduce the mass to one-fourth

Center of mass is a point

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Which is geometric center of a body

From which distance of particles are same

Where the whole mass of the body is supposed to be centered

Which is the origin of reference frame

Ball pen function on the principle of

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Viscosity

Boyle's law

Gravitational force

Surface tension

When boron is added as an impurity to silicon the resulting material is

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n type conductor

n type semiconductor

p-type conductor

p-type semiconductor

The dimensional formula of toque is:

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[ML²T²]

[MLT²]

[ML^-1T^-2]

[ML^-2T^-2]

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

An ideal choke (used along with fluorescent tube) would be

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A pure resistor

A pure capacitor

A pure inductor

A combination of an inductor and a capacitor

Electrons in the atom are held in the atom due to

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Coulomb forces

Nuclear forces

Gravitational forces

Van der Waal's forces

A piece of fuse wire melts when a current of 15 ampere flows through it.With this current, if it dissipates 22.5 W. the resistance of fuse wire will be

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Zero

10 Ω

1 Ω

0.10 Ω

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NAT I Computer Science Physics MCQs With Answers

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