Question # 1

Cosine of an angle is positive in:

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2nd quadrant

3rd quadrant

4th quadrant

All of these

The instrument which detects the instant at which external pressure becomes equal to the systolic pressure is

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stethoscope

thermometer

manometer

barometer

The working of all DC electric meters (galvanometers, ammetersand voltmeters) depends upon

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Heating effect of current

Chemical effect of current

Magnetic effect of current

Electromagnetic effect of current

Which of the following is most suitable as the core of transformer

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Soft iron

Alinco

Steel

None of these

Energy is dissipated and consequently the energy mass system do not oscillate indefinitely because of

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very small energy

very large energy

frictional forces

acceleration due to gravity

Newton published laws of motion in his famous book "principia" in

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1867

1667

1676

1687

In AND gate, the output is 1 if:

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Both inputs are 0

Both inputs are 1

Only one input is 0

Both (A) and (B)

Both (A) and (C)

The efficiency of diesel engine is

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25%

25 - 30%

35%

35 - 40%

Waves transport energy

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without transport energy

with matter

both of them

none of them

The value of output resistance of OP-AMOP is of the order of

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few ohms

few hundred ohms

several kilo ohms

several mega ohms

At resonance, the phase angle for RLC series resonance circuit equals

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0°

90°

180°

270°

The expression F x t is called impulse if the time 't' is

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zero

very large

very small

infinite

If the distance between two charges is doubled, the force between them will become:

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Double

Half

Three times

One fourth

One third

To and from motion of a body about its mean position is known as:

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Translatory motion

Vibratory motion

Rotatory motion

None of these

The missing mass which is converted to energy in the formation of nucleus, is called

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packing fraction

mass defect

binding energy

none of these

Crystal of germanium or silicon in its pure form at absolute zero acts as:

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A conductor

A semiconductor

an insulator

Both (A) and (C)

Both (A) and (B)

A point on the rim of a wheel moves 0.2 m when the wheel turns through an angle of 14.3 degrees. The radius of the wheel is:

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0.05 m

0.08 m

0.8 m

0.008 m

A potential barrier of 0.7V exists across p-n junction made from:

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Germanium

Silicon

Arsenic

Gallium

Indium

A solenoid is a coil of wire which is:

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Short, loosely wound, cylindrical

Long, tightly wound, spherical

Long, loosely wound, cylindrical

Long, tightly wound, cylindrical

None of these

What must be changing when a body is accelerating uniformly?

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the force acting on a body

the velocity of the body

the mass of the body

the speed of the body

The equation of continuity is

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A₁A_{2 = V}₁V₂

A_1/_V_{1 =}A_2/V₂

_V_1/A₁₌V_2/A₂

A₁_V_{1 =}A₂V₂

When angular acceleration is positive, the body rotates:

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Slower

Slowest

Faster

None of these

If the volume of the gas is to be increased by 4 times, then

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Temperature and pressure must be doubled

At constant P the temperature must be increased by 4 times

At constant T the pressure must be increased by four times

It cannot be increased

The total charge of any nucleus is given as

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Ze²

Z²e

Z/e

Ze

Earth is considered to be

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a non-inertial frame

an inertial frame

an accelerated frame

none of the above

Every crystalline solid has

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definite melting point

different melting points

may or may not be definite

none of them

The amplitude of oscillation of each atom in a metallic crystal rises with the

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rise in temperature

decrease in temperature

even temperature remains constant

all of them

Newton's first law is also called:

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Law of torque

Law of force

Law of inertia

None of these

The phase determines the

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displacement

amplitude

frequency

state of motion of vibrating body

The quantity F x t is called as

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momentum

velocity

acceleration

impulse

Brownian motion increases due to

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Increase in size of Brownian particle

Increase in temperature of medium

Increase in density of medium

Increase in viscosity of medium

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