Question # 1

Resolving power in mth order diffraction for grating is given by:

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R = N/m

R = m/N

R = N x m

None of these

Gamma rays consist of steam of

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electron

proton

photons

all of these

When the different streamlines cannot cross each other, then this condition is known as

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continuity condition

turbulent flow condition

steady flow condition

none of them

SI unit of wave length is:

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Kilometer

Metre

Centimetre

Hertz

If we draw a graph between d(along x-axis) and F (along y-axis) and get a straight line horizontal to x-axis then area under this straight line represents:

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Power

Work

Pressure

None of these

A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called

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reversible process

irreversible process

any one of them

none of them

The center of mass of a sphere lies at:

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The axis of the sphere

Circumference of sphere

Center of the sphere

None of them

Consider a photon of continuous X-ray and a photon of characteristics X-ray of same wavelength. Which of the following is/are different for the two photons

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Frequency

Penetrating power

Energy

Method of creation

When a platinum wire is heated, it appears white at

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1600°C

900°C

1100°C

1300°C

If the object and its image are located at a distance of 5 cm from the focus of a convex lens, the focus length of the lens will be:

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5 cm

10 cm

20 cm

25 cm

Rate of diffusion is

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Faster in solids than in liquids and gases

Faster in liquids than in solids and gases

Equal to solids, liquids and gases

Faster in gases than in liquids and solids

In a uniform circular motion (horizontal) of a ball tied with a string,velocity at any time is at any angle θ is

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θ = 60°

θ = 30°

θ = 90°

None of the above

The combination of solenoid and a specimen of iron inside it make a power full magnet called

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Horse shoe magnet

Bar magnet

Electromagnet

10^-10 to 10¹⁸

The minimum number of unequal forces whose vector sum can be zero is

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3

2

1

4

Which one of the following has only bulk modulus?

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Diamond

Glass

Tungsten

Water

If a raindrop with a mass of 0.05 g falls with constant velocity the retarding force of atmospheric firction is neglect density of air

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Zero

49 dynes

490 N

49 N

The phenomenon of geothermal energy is a geyser. It is a hot spring that discharges

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Steam

Hot water

Both

None of these

The vertical component of velocity of a projectile during its motion is minimum

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at the time of projection

at the highest point

just before hitting the plane of projection

all of them

A typical rocket consists of fuel

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more than 60% of launch mass

less than 60% of launch mass

less than 80% of launch mass

more than 80% of launch mass

Which Phenomenon proves that nature of light is transverse

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Interference

Diffraction

Scattering

None

The units of modulus of elasticity are

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Nm^-2

Nm²

Torr

Both B and C

The capacitance of a parallel plate capacitor does not depend upon

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Area of plates

Medium between plates

Distance between plates

Metal of the plates

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