Question # 1

In case of mechanical waves, we study the motion of

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a single particle

collection of particle

any one of them

none of them

From sand, we get a material used for construction with the motion of bodies under the action of forces is called:

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Optics

Mechanics

Thermodynamics

Astrophysics

In series RC circuit when R=X_c, then the phase angle is

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0°

90°

70°

45°

If the absolute uncertainty of an instrument is 0.0a1 cm, then its least count will be :

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0.005 cm

0.01 cm

0.02 cm

0.001 cm

Current, voltage, resistance measuring circuit is connected with the galvanometer with the help of switch, known as

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ON switch

off switch

function switch

none of these

Which one of the following elasticizes is possessed by fluids:

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Young's elastic modulus (length)

Bulk elastic modulus (volume)

Modulus of rigidity (shape)

None of these

The expression for restoring force is

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F=ma

F=kx

F= -kx

Kx=ma

When charged particle is projected perpendicular to a uniform magnetic field its trajectory is

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circular

elliptical

cycloid

straight line

When the pn-junction is forward biased. the current flows through it is of the order of

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mili-amperes

amperes

nano-amperes

micro-amperes

Amplitude is the displacement of the vibrating body from:

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One extreme position to the other extreme position

Mean position any one extreme position

Both A and B are correct

None of these

Bernoulli's equation is applicable for

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turbulent flow

streamline flow

both (a) and (b)

all kinds of flows

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

In a heat engine, heat is supplied by the

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cold reservoir

sink

hot reservoir

none of them

Which quantity has different dimension?

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Tension

Work

Energy

Torque

A certain force gives an acceleration of 2 m/sec²to a body mass 5 kg. The same force would give a 20 kg object an acceleration of:

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0.5 m/sec²

5 m/sec²

1.5 m/sec²

9.8 m/sec²

The phenomenon of generation of induced emf is called

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Electrostatic induction

Magnetic induction

Electromagnetic induction

Electric induction

Both (A) and (D)

The body passing a viscous medium affected by:

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One force only

Two forces only

Four forces

None of these

Some charge is being given to a conductor. Then its potential

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Is maximum at surface

Is maximum at centre

Is remain same throughout the conductor

Is maximum somewhere between surface and centre

A 100 kg car is moving at a speed of 10 m/sec and comes to rest after covering a distance of 50 m. the amount of work done against friction is:

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+5 x 10¹J

+5 x 10²J

+5 x 10³J

+5 x 10⁴J

Instead of moving the coil towards a magnet, the magnet is moved towards the coil with the same speed. The galvanometer shows current

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Of same magnitude in the same direction

Of different magnitude in the same direction

Of same magnitude but in opposite direction

Of different magnitude in the opposite direction

None of these

Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10Ωwhen a potential difference of 20 V is applied between its ends

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120 C

240 C

20 C

4 C

The L-C parallel circuit the capacitor draws a

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leading current

lagging current

main current

none of these

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

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zero

very large

very small

infinite

A body moves a distance of 10 m among a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which the force makes with the direction of motion of a body is:

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0°

30°

60°

90°

For measuring the angle between two vectors graphically, we join:

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Tails of both the vectors

Tail of one vector with the head of other

Heads of both the vectors

None of these

The pressure of gas everywhere inside the vessel will be the same provided the gas is of

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Non-uniform density

uniform density

high density

low density

In order to make a voltmeter, high resistance is connected with galvanometer, in

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perpendicular

may be paralled or pendicular

series

none of these

When the total displacement is divided by total time taken, we get:

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Velocity

Average speed

Average velocity

None of these

The electric field, magnetic field and the direction of their propagation are mutually

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perpendicular

parallel

none of these

A vector which has magnitude 'one' is called:

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Resultant vector

A unit vector

Position vector

None of these

Which one of the following is an example of SHM

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Motion in a plane

Motion in a swing

Motion in a car

None of these

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