Question # 1

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

The basic circuit element in a d.c. circuit is a/an

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Inductor

Resistor

Capacitor

Battery

When two spherical conducting balls at different potentials are joined by a metallic wire, after some time:

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Both the conductors are at the same potential

Potential difference across the conductors remain constant

Potential difference across the conductors becomes zero

Both (A) and (B)

Both (A) and (C)

Two electric bulbs of 200 W and 100 W have same voltage. If R₁and R₂be their resistance respectively then

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R₁= 2R₂

R₂= 2R₁

R₂=4R₁

R₁= 4R₂

Which of the following is not thermo dynamical function?

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Enthalpy

Work done

Gibb's energy

Internal energy

When small number of atoms from some other suitable element is added to the semi-conductor material, then this process is known as

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impurification

adding

doping

extrinsivity

As the light shines on the metal surface, the electrons are ejected

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slowly

instantaneously

either of these

none of these

A solar cell converts energy of the Sun into:

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Heat energy

Magnetic energy

Light energy

Sound energy

A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

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Increases

Decreases

Remain unchanged

Becomes infinite

An isochoric process is one which take place at

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Constant internal energy

Constant entropy

Constant volume

Constant pressure

Parallel vectors of same magnitudes:

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Are equal

Are unequal

When added give the some equal to zero

Give the answer equal to zero

For the conversion of heat into work, the two bodies are essential as temperature which is

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Similar

Very little difference

Large difference

None of these

A capacitor of 2μF is connected with a battery of 12 volts the charge stored is

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2.5 × 10^-5 C

2.4 × 10^-6 C

2.4 × 10^-5 C

2.4 × 10^-6 C

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates,Then quantity that remains unchanged is

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Charge Q

Potential V

Capacity C

Energy U

The original source of solar energy is

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Moon

Sun

Stars

Earths

The streamlines are ___________ for an ideal fluid in steady flow

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Perpendicular

Parallel

Anti parallel

Intersect each other

In a photocell, cesium coated oxidized silver emits electrons for :

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Visible light

Infrared light

Ultraviolet light

All of these

A longitudinal sinusoidal wave has wavelength of 1cm and a period of 2sec. Its wavevelocity is:

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50 cm/ sec

0.5 cm/ sec

5 m/ s

0.005 m/ sec

Which of the given pair have same dimension

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Stress, pressure

Elastic modules, pressure

Stress, elastic modules

All have same dimension

The typical speed of Earth around the sun is

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29700 ms^-1

29600 ms^-1

29500 ms^-1

29400 ms^-1

A perpetual motion is that motion which is

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Temporary

Continuous

Forever

None of these

The motion of molecules in gases i:

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Orderly

Random

Circular

All of these

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