Question # 1

If a ball was thrown out of a rocket in free space, then it would.

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Accelerate away from the rocket

Remain motionless after leaving the rocket

Travel rectilinearly with constant speed

Move always parallel to the rocket

A unijunction transistor

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Has only one junction

Is a two terminal device

Is fabricated from germanium

Is fabricated fromuranium

The cosine of the phase angle between the current and voltage in an A.C. circuit is called the

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Lead factor

Lag factor

Dissipation factor

Power factor

If a wave vibrate 10 times in 1 s with a speed of 10 m s-1 the correct wavelength of the wave is.

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1 m

10 m

20 m

100 m

The resistance of a coil changes directly with

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The current of A.C.

The frequency of A.C

The inductance

Both B and C

The cathode ray oscilloscope is used for

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Displaying the waveform of given voltage

Displaying the wave form of given vibrations

Rectifying a.c to d.c.

Rectifying D.C. to A.C.

According to kinetic theory of gases one assumes that the collisions between molecules are.

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Perfectly elastic

Perfectly inelastic

Partly elastic

Partly inelastic

A body of mass 2 kg is suspended from the celling of an elevator moving up with an acceleration 'g' its apparent weight in the elevator will be.

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9.88 N

19.8 N

29.4 N

39. 2 N

The binding energy to pull the deuterium H apart into a proton and a neutron is equal to.

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1.22 MeV

2.22 MeV

3.22 Mev

4.22 MeV

If slope of velocity time graph gradually decreases, then a body is said to have

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Negative acceleration

Positive acceleration

Uniform velocity

Variable velocity

Magnetic field does not cause deflection in

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Alpha particle

Beta minus particles

Beta plus particles

Gama rays

What happens to the energy of a charged condenser is plate separation is increased.

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It decreases

It increases

It becomes zero

It remains unchanged

the gain of an amplifier is independent of

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The two externally connected resistances

What is happening inside the amplifier

Internal structure of the amplifier

All of the above

The penetrating power of X rays is least with materials of.

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High mass density

High volume density

High electron density

High weight

In case of a convex lens the rays closed to and parallel to the principal axis will converge after refraction by the lens at a point.

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Optical centre

Principal focus

Focal plane

Principal axis

In which form energy is stored in acondenser.

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Electric energy

Potential energy

Kinetic energy

Magnetic energy

Which of the given geometries will result in the largest convection consfficient.

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Vertical plate

Diagonal plate

horizontal plate facing upwards

Horizontal plate facing downwards

The maximum distance between an object and its real image in case of convex lens is

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f

2f

2.5 f

4 f

An induced emf in a coil is independent of

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Time

Resistance

the number of turns in a coil

The charge in the magnetic flux

Which one of the following is not true.

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velocity can be negative

velocity is a vector

Speed is a sccalar

Speed can be negative

Which of the following is heat transfer by means of the emission or absorption of electromagnetic radiation such as sunshine.

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Conduction or diffusion

Convection

Radiation

Mass transfer

Which property of waves is independent of the others.

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Amplitude

Velocity

Frequency

Wavelength

The angular momentum of a body about a fixed point is conserved if its velocity

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Decreases

Increases

Remain the same

Becomes zero

Under an isothermal process internal energy of the system.

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Increases

Decreases

Remain constant

is Zero

In modulation, low frequency signal is called

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Fluctuated signal

Loaded signal

Modulated signal

Harmonic signal

The magnetic flux linked with a circuit when a unit current flows through it is known as.

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Induced current

Induced emf

Coefficient of self induction of circuit

Eddy current

The normal adjustment the magnifying power of an astronomical telescope is.

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fe/fo

fo/fe

fo+ fe

fo -fe

The unit formed by combining the fundamental untis of length , mass and time.

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Absolute units

Practical units

Bse unit

Derived units

Transistor stands for

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Transfer of resistance

Transfer of current

Transfer of power

Transfer of voltage

Which of the following parameters does not characterize the thermodynamic state of matter.

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Temperature

Pressure

Volume

work

Which of the following is an electrical insulator that can be polarized by an applied electric field.

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Conductor

Condenser

Di electric

Capacitor

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