Question # 1

One complete round trip of the body about its mean position is called

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displacement

vibration

a complete motion

an acceleration

From sand, we get a material used for construction of computer chips. That material is called:

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Germanium

Silicon

Copper

Lead

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

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10 KJ

5 KJ

2 KJ

1 KJ

How much force is required to slide one layer of the liquid over the other layer is measured by

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friction

density

viscosity

resistivity

If the external driving force is periodic with a period compareable to the natural period of the oscillator, then we get

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diffraction

beat

interference

resonance

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

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A - Z

A + Z

Z

A

At absolute temperature, the kinetic energy of the molecules

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Becomes zero

Becomes maximum

Becomes minimum

Remain constant

Which of the following has a great concentration of impurity

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base

emitter

collector

none of these

When a body is moves along a circular path with constant speed, it has an acceleration, which is always directed:

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Along the tangent

Toward the centre

Away from the centre

None of them

A body with frequency would complete one vibration in:

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f seconds

1/f seconds

1 second

f²second

When a vector is multiplied by a negative number, its direction:

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Remains the same

Changes

Changes by 180°

None of these

A ball is dropped vertically down and it takes time t to reach the ground.At time t/2:

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The hall had covered exactly half the distance

The velocity of the ball was V/3 where V is the velocity when it reached the ground

The ball had covered less than half the distance

The ball had covered more than half the distance

When a sillicon crystal is doped with a pentavalent element, such an extrinsic semi-conductor is called

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p-type semi-conductor

n-type semi-conductor

either of them

none of them

Fraunhofer's lines commonly visible in the sun's spectrum are examples of

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Line emission spectrum

Line absorption spectrum

Band emission spectrum

Band absorption spectrum

In a half wave rectifier circuit operating from 50 Hz mains frequency, the fundamental frequency in the ripple would be:

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25 Hz

70.7 Hz

50 Hz

100 Hz

A lift is moving up with acceleration equal to 1/5 of that due to gravity.The apparent weight of a 60 kg man standing in lift is:

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60 kg wt

72 kg wt

48 kg wt

Zero

Under normal circumstances the volume of the blood is sufficient to keep the vessels

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Inflated all the time

Deflated all the time

Contracted all the time

Squeezed all the time

When a germanium atom is doped with phosphorous atoms it becomes

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N-type semiconductor

p-type semiconductor

An insulator

None of them

If a body is at rest, then it is said to be in

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torque

equilibrium

dynamic equilibrium

static equilibrium

A particle is moving in a vertical circle.The tensions the string when passing through two positions at angles 30° and 60° from vertical (lowest positions) are T₁ and T₂ respectively.Then

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T₁ = T₂

T₂ > T₁

T₁ > T₂

Tension in the string always remains the same

The expression for the range of the projectile is

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Two vectors have unequal magnitudes can their sum be zero ?

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Yes

No

Can be zero

None of these

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