Question # 1

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

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Along the tangent

Towards the centre

Away from the centre

None of them

Experiments revealed that the ratio of the stress to the strain is a constant value for

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different material

all materials

a given material

all of them

Two copper balls of 1 cm and 2 cm in diameter are simultaneously dropped in the same viscous medium. The terminal velocity of bigger ball is:

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Not affected due to its size

Twice that of small size ball

Four times that of small size ball

1/4th of that of small size ball

Maximum density of H₂O is at the temperature

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32°F

39.2°F

42°F

4°F

If a train traveling at 72 kmph is to be brought to rest in a distance of 200 meters then its retardation should be

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20 ms^-2

10 ms^-2

2 ms^-2

1 ms^-2

The combined effect of resistance and reactance in a.c. circuit is called

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conductance

resistance

impedance

choke

Chock consumes externally small

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Charge

Current

Power

Potential

The third band of the colour code:

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Gives the number of zeroes

Is decimal multiplier

Gives the resistance tolerance

Gives the third digit

Both (A) and (B)

Ball pen functions on the principle of

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Viscosity

Boyle's law

Gravitational force

Surface tnesion

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

In solids, only following type/s of wave can travel:

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Transverse

Longitudinal

Both A and B

None of them

The reflected light is

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Unpolarized

Polarized

Partially polarized

None of these

Steam engine is:

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An optical system

A thermal system

A thermodynamic system

None of these

The sky appears blue because

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Red light is absorbed

Blue light is scattered the most

Blue light is absorbed

It is its natural color

Davisson and Germer, in their experiment used:

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Nickle crystal

Lead crystal

Graphite crystal

Glass

The motion of molecules in gases i:

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Orderly

Random

Circular

All of these

The waves produced in a stretched string are called

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Stationary waves

Mechanical waves

Transverse mechanical waves

None of these

The low blood pressure is known as

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Diastolic

Systolic

Low blood pressure

None of these

Identify the correct unit of pressure among t bese

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kgms^-1

kgm^-1s^-2

kgm²s^-2

kgm^-2s^-1

The torque acting upon a system is zero Which of the following will be conserved

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Linear momentum

Angular momentum

Moment of inertia

Angular velocity

Fraunhofer spectrum is a

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Line absorption spectrum

Band absorption spectrum

Line emission spectrum

Band emission spectrum

The velocity v of a particle at time t is given by:

v = at + b/t + c

The dimensional formula of a, b and c care respectively:

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L²;T and LT²

LT²; LT and L

LT²; L and T

L;LT and T^-2

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