Question # 1

Liquids and gasses have

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zero viscosity

non-zero viscosity

very large viscosity

very small viscosity

Two bodies of masses 1 kg and 5 kg are dropped gently form the top of a tower. A a point 20 cm from the ground both the bodies will have the same

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Momentum

Kinetic energy

Velocity

Total energy

Centripetal acceleration is also called ________ acceleration

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Tangential

Radial

Angular

None of these

When the shear stress and shear stain are involved, then their ratio is called

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Young's modulus

Bulk modulus

Shear modulus

all of them

In which of the following components, pn-junction is used

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light emitting diode

photo diode

photo voltaic cell

all of these

The voltage increases linearly with

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time

velocity

acceleration

torque

Curie is a unit of

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reluctance

resistivity

binding energy

radioactivity

The solids are classified as:

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Metals

Crystalline

Amorphous

Polymeric

All except (A)

The root mean square voltage for alternating current is

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All of these

A car is moves around a circular track of radius 0.3 m at the rate of 120 rev/min. The speed v of the car is:

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38 m/sec

3.8 m/sec

0.6 m/sec

None of these

Referring to above figure, due to change in current in the coil P, the change in magnetic flux

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Is associated with coil P

Is associated with coil S

Causes and induced current in coil S

All of these

None of these

The horizontal component of a projectile moving with initial velocity of 500 ms^-1at an angle 60° to x-axis is

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500 ms^-1

1000 ms^-1

250 ms^-1

zero

Time between the normal heart beats is

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8 × 10^-1 sec

_{8 × 10}^-2_sec

8 × 10^-3 sec

None of these

For destructive interference the path difference is give by:

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(m-1/2)λ

(m+1/2)λ

mλ

1/2 mλ

The property of light which makes light possible to be transmitted into inaccessible place is

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Interference

Diffraction

Polarization

None of these

The electric field due to an infinitely long thin wire at a distance R varies as

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1/R

1/R²

R

R²

The critical temperature of aluminum is

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1.18 K

4.2 K

3.72 K

7.2 K

The direction of angular acceleration is

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Opposite of the axis of rotation

Along the axis of rotation

Perpendicular to the axis of rotation

None of these

The materials in which valence electrons are bound very tightly to their atoms and are not free, are known as

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conductors

insulators

semi-conductors

all of them

The temperature of igneous rocks is about

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100 ^oC

200 ^oC

250 ^oC

270 ^oC

One ferms is equivalent to

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10^-14 meter

10¹⁴ meter

10^-15 meter

10¹⁴ meter

Geothermal energy can be obtained from the heating rocks by the

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Igneous rocks

High temperature water

Decay of radioactive element

All of these

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