Question # 1

A condenser of capacity 50μF is charged to 10 V.The energy stored is

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1.25 x 10^-3J

3.75 x 10^-3J

2.5 x 10^-3J

5 x 10^-3J

The consumption of energy by a 1000 watt heter in half an hour is:

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5 Kwh

0.5 Kwh

2.5 Kwh

3.2 Kwh

The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its

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I_cwill decrease

V_CEwill increase

I_Cwill increase

V_CCwill increase

According to the second law, which is must to produce work

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a source contains a large amount of heat energy

two sources at the same temperature

two sources at the different temperatures

a source contains a small amount of energy

In deriving the Bernoulli's equation, we assume that the fluid is

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incompressible

no viscous

flows in a steady manner

all of them

Substances that do not flow easily have

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large coefficient of viscosity

small coefficient of viscosity

either of them

none of them

What is another name for laminar flow?

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streamline

unsteady flow

turbulent flow

both (a) and (b)

Energy stored in the spring of a watch is called

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Potential energy

Kinetic energy

Nuclear energy

Elastic potential

The machines which deals with the objects moving with velocities approaching that of light is called:

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Relativistic mechanics

Wave mechanics

Quantum

Statics mechanics

A ball is dropped vertically down and it takes time t to reach the ground. At time t/2

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The ball had covered exactly half the distance

The velocity of the ball was V/3 where V is the velocity when it reached the ground

The ball had covered less than half the distance

The ball had covered more than half the distance

The velocity given to a body to go out of the influence of earth's gravity is known as:

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Terminal velocity

Orbital velocity

Escape velocity

None of these

Polymers are the chemical combination of carbon with:

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Nitrogen

Oxygen

Hydrogen

All of these

None of these

On the ground the gravitational force on a satellite is W. What is the gravitational force on the satellite when at a height R/50,where R is the radius of the Earth

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1.02 W

1.00 W

0.98 W

0.96 W

Fluid friction of a spherical body depend on the

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Shape

Size

Orientation

All of these

As the Earth spins on its axis, the satellite on the equator always the remains the

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Opposite point

Different points

Same point

None of these

Sadi Carnot described an ideal engine using only isothermal and adiabatic process in

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1820

1825

1837

1840

The SI unit of stress is same as that of

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Momentum

Pressure

Force

Length

A regular, repetitive, three-dimensional pattern of points, which represent the position of molecules, atoms or ions in the crystal, is called:

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Unit cell

Space lattice

Crystal

None of these

The absence of light in the optical fibres represents the number

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0

1

2

-1

How many fringes will pass a reference point if the moveable mirror of a Michelson s interferometer is moved 0.06 mm The wavelength of light used is 5.89 x10^-3 mm

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200

300

20.4

2.3

The SI units of momentum is

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Kg m s^-2

Kg ms

Kg m s²

Ns

The capacity of television channels INTELSAT VI satellite is

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2

3

10

20

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