Question # 1

Two wires P and Q each of same length and the same material are connected in parallel to a battery The diameter of P is half that of Q What fraction of the total current passes through P.

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0.02

0.25

0.33

0.50

A wave reflected from the boundary of a rarer medium will have phase change

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0 ^o

60 ^o

90 ^o

180 ^o

When all the systems taking part in a process are included, the entropy.

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Decreases

Either remains constant of increases

Either remains constant or decreases

Remains constnat

When a helium atom loses an electron it becomes.

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An a particle

A proton

A positive helium ion

A negative helium ion

Which of the following proves that light waves are transverse in nature.

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Diffraction

Interference

Polarization

Refraction

Which one among these contacts in a transistor is non rectifying.

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Base

Emitter

Collector

None of these

In a magnifying glass, the objective is placed at a distance

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Less than the focal

Between the focal length and twice the focal length

Greater than twice the focal length

At the focus of the lens

In which of the following controlled nuclear chain reaction is used to liberate energy.

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Nuclear bomb

Atomic bomb

Hydrogen bomb

Nuclear reactor

Amorphous solids are also called.

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Crystalline solids

Glassy solids

Polymeric solids

Polymers

Which of the following is not true.

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Velocity can be nagative

Velocity is a scalar

Speed is a vector

Speed can be negative

A physical quantity which produces rotation in a body is called.

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Force

Torque

Momentum

accelerate

The energy supplied in charging a capacitor resides after the charging in.

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The magnetic field

The electric field

the battery

The moving conduction charges

Which is defined as the ration of image height of the object height.

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Linear magnification

Angular magnification

Magnifying power

Resolution

What is the power rating of a lamp connected to a 12 V source when it carries 2.5 A.

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4.8 W

14.5 W

30 W

60 W

In order to reduce uncertainty in momentum one must use light of.

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Short wavelength

Large wavelength

Wavelength of intermediate value

Wavelength of any value

Power of the lens is one dioptre, if its focal length is.

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1/6 metre

1/2 metre

1 metre

8 metre

LASER is a device which can produce.

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Monochromatic beam of light

Coherent beam of light

An intense beam of light

All of the above

When a beta particle travels though a medium it knocks out electrons from the atoms due to.

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Gravitational force of attraction

Electrostatic force of repulsion

Nuclear force

Electromagnetic induction

The product of force and duration of impact is called.

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Density

Momentum

Torque

Impulse

A structure that is intermediate between order and disorder is.

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glassy solids

Polymeric solids

Amorphous solids

Crystalline solids

The wavelength of Pascha series lies is the

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Visible region

Ultraviolet region

Infrared region

Invisible region

A wave that consists of oscillations occurring perpendicular to the direction of energy transfer is called.

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Transvers wave

Longitudinal wave

Stationary wave

Shock wave

Out of the following pairs, which one does not have te same dimensions.

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Force and weight

Pressure and stress

Energy and work

Momentum and torque

Light entering glass will not suffer change in

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Wavelength

Direction

Velocity

Frequency

In four stroke cycle the crank makes

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One complete revolution

Two complete revolutions

three complete revolutions

Four complete reveolutions

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

Why danger signals are made red.

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Our eyes are more sensitive to real colour

Red colour has minimum scattering

Red colour has maximum scattering

Red colour has maximum frequency

An operational amplifier have how many input terminals.

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One

Two

Three

Four

Tuning fork is a source of.

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Heat

Energy

Light

Sound

A large ripple tank with a vibrator working at a frequency of 30 Hz produce 25 complete waves in a distance of 50 cm. The velocity of the wave is.

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9.53 cm s-1

60 cm s-1

750 cm s-1

1500 cm s-1

Viscosity will be maximum when

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Water is at 20 ^oC

Honey is at 20 ^oC

Water is at 100 ^oC

Milk is at 100 ^oC

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