Question # 1

When each particle of the fluid moves along a smoth path, this path is known as

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straight path

smooth path

haphazard path

steamline

If a given spring of spring constant k is cut into two indentical segments, the spring constant of each segment is:

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k/2

2 k

4 k

None of these

A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?

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200 W

302.5

250 W

350 W

Density of fluid is defined as:

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Its volume to mass ratio

Product of volume and mass

Its mass of volume ratio

None of these

According to the de-Brogile relation, an object of large mass and ordinary speed has

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very small wavelength

very large wavelength

very small frequency

all of these

The displacement of body executing SHM is

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x_ocoswt

x_osinwt

x_osin²wt

Both A, B

The lasing or active medium in He-Ne laser discharge tube is:

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Nitrogen

Helium

Hydrogen

Neon

None of these

In the formula B= µ̻ nl, the symbol n denotes:

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Total number of turns of solenoid

Number of turns per unit length

Number of turns per unit volume

Numbers of turns per unit area

Number of moles

Battery is charged in motor cars, which is based on

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Chemical effect

Magnetic effect

Electric effect

None

The range of projectile is 50 m whenθ is inclined with horizontal at 15°. What is the range whenθ becomes 45°?

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400 m

300 m

200 m

100 m

The wave motion set up in any medium depends upon:

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Elasticity

Inertia

Density

All of these

If N is the number of rulings on the grating, then the resolving power in the mth order diffraction equals to

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R = N × m

R = N/m

R = m/N

R = N × m²

The distance between different interference fringes are:

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Variable

Same

Different

None of these

The body moving with uniform velocity may be

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in equilibrium

accelerating

changing in direction

changing in magnitude

The critical temperature of aluminum is

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1.18 K

4.2 K

3.72 K

7.2 K

The typical speed of human swimming is

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1.5 ms^-1

2 ms^-1

2.5 ms^-1

3.0 ms^-1

Vector subtractions is made when vectors are just

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Added

First make it negative then add

Only make it negative

None of these

The viscous force on a small sphere moving in fluid at high speed v is proportional to

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v²

v

1/v

1/v²

If the slits in YDS experiment are made closer, fringe spacing will:

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Increase

Decrease

Remain same

None of above

The angle between rectangular components of a vector is

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0°

60°

90°

120°

A geometric shape of a solid obtained by regular, respetive, three-dimensional arrangements of its molecules,atoms or ions is called a:

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Crystal

Crystal Lattice

Crystal plane

None of these

A collision is an elastic collision in which

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Momentum and K.E. is conserved

Momentum is conserved and K.E. is not conserved

Momentum is not conserved and K.E. is conserved

None of these

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