Question # 1

In metallic crystals which of the following thing remains constant

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amplitude of oscillations

temperature of solid

average atomic positions

all of them

If the value of C in a series RLC circuit is increased, the resonant frequency

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Is not affected

Increase

Remains the same

Decreases

If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us

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parabola

straight line

hyper bola

ellipse

One mole of any substance contain

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same number of molecules

different number of molecules

may be same or different

none of them

A long wire wound tightly on a cylindrical core is called:

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Potentiometer

Solenoid

Toroid

Wheat and stone bridge

None of these

When an oscillatory motion repeats itself, then this type of motion is called

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vibratory motion

constant motion

fixed motion

periodic motion

0.1 kg mass will be equivalent to the energy

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9 x 10¹⁵J

5 x 10⁸J

6 x 10¹⁶J

9 x 10^-16J

Ultra-violet rays differ from X-rays in that they

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Cannot be diffracted

Cannot be polarized

Have a lower frequency

Are deviated when they pass through a magnetic field

It is customary represent a current flowing towards the reader by a symbol

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(x)

(+)

(.)

(-)

(÷)

An ideal choke (used along with fluorescent tube) would be

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A pure resistor

A pure capacitor

A pure inductor

A combination of an inductor and a capacitor

A particle moving uniformly along circle its projection along diameter performs

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Linear motion

Projectile motion

SHM

Rotatory motion

A particle is moving along a circular path of radius 5 m with uniform speed 5 m/sec what will be the magnitude of centripetal acceleration when the particle completes half revolution

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10π m/sec²

5 m/sec²

10/π m/sec²

Zero

At what distance should a book be placed from a 50 Cd bulb so that the luminance on the book becomes 2 Im m^-2

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50 m

10 m

5 m

1 m

A person standing on a rotating platform has his hands lowered.He suddenly outstretches his arms.The angular momentum

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Becomes zero

Increases

Decreases

Remains the same

Newton's second law of motion is also called

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Law of inertia

Law of acceleration

Law of force

None of these

Shear modulus for tungsten is

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50

100

150

200

The height at which the satellite stay directly above a particular point on the surface of the earth above the equator is

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24000 km

36000 km

42000 km

None of these

The burnt gas expelled from the rocket engine with

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High velocity

Extremely high velocity

Very high velocity

None of these

Moment of inertia of a thin ring or hoop is

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mr²

2/3 mr²

5/6 mr²

1/3 mr²

Calculate entropy change when 1.0 Kg ice at 0°C melts into water at 0°C. Latent heat of fusion of ice L_f= 3.36 x 10⁵J Kg^-1

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1.18 x 10²JK^-1

1.20 x 10⁴J Kg^-1

1.23 x 10³JK^-1

1.23 x 10⁴J Kg^-1

Which one is least multiple?

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exa

femto

atto

nano

Which of the following have same SI units

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Force

Impulse

Momentum

b and c

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