Question # 1

What type of current is produced by batteries.

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Direct current

Alternating current

Pulsating current

Convection current

Two simple pendulums of the same length but having different masses

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Have different frequencies

Will have period proportional to their masses

Will have periods independent of their length

Have the same period

What happens when a 250 V, 2500 W water heater is connected to main supply using a plug fitted with a 5 A fuse.

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The fuse in the plug melts

The heartier burns out

The hearter runs at half power

The hearter works normally

Which was the transparent front part of the eye that covers the pupil, iris and interior chamber.

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Cornea

Fovea

Sclera

Choroid

Which of the following radiations will burn human skin

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Infrared

Ultraviolet

X rays

Alpha particles

A leser beam may be used to measure very large distance because it is.

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Unidirectional

Cohernet

Monochromatic

Not absorbed

At high frequency the current through a capacitor will be

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Small

Zero

Large

Infinity

Which of the following is an example of induced magnetism.

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A compass needle pointing north

A north pole attracting iron filings

A northpole repelling a north pole

The coil of a motor turning in a magnetic field.

Who explained Browian movement quantitatively.

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Issac Newton

albert Einstein

James Maxewll

Robert Brown

The dot product of electric intensity and area of a surface is equal to.

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Magnetic flux

Electric flux

Motional emf

Induced emf

If the roads are not banked

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A vehicle will turn over

A vehicle will not travel along with curve

Tyres and bearing are damaged

Roads will be spoiled

The discovery of interference of light was made possible in.

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1801

1901

1825

1925

Which of the following medium can transmit both transverse and longitudinal waves.

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Solid

Gas

Liquid

Plasma

Two waves which combine to produce a resultant by reinforcing each other of every point demonstrate.

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Destructive interference

constructive interference

Refraction

polarization

The reluctance of a body to start moving is called.

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Mass

Weight

Force

Inertia

The conductivity of a conductor is independent of the

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Electric charge

Electric potential

Electric field

Internal resistance

A body is said to be in translations equilibrium, only if the vector sum of all the forces acting on it becomes.

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Double

Zero

Maximum

Quadruples

Which of the following pair is correct.

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Rutherford - x-rays

Roentgen - Electron

Chadwick - Neutron

J.J. Thomson -Photon

In half wave rectifier the rms value of A.C. component of the wave is.

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More than A.C. Value

Less than D.C. value

Same as that of D.C.

Not detectable

The magnitude of the resultant of two equal forces is equal to either to the force What is the angle between the two forces

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0 ^o

120 ^o

60 ^o

180 ^o

The minimum value of charge on any object is.

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1.6 x 10^-29 C

1.6 x 10^-19 C

1.6 x 10^-9 C

1 C

An inductor may store energy in

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Its magnetic field

Its electric field

Its coils

A neighboring circuit

The SI unit of impulse is.

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N m

N s

Kg ms -1

Both b and c

Angular simple harmonic motion is.

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Periodic rectilinear motion

Independent of any applied torque

Periodic rotational motion

Never defined

The practical efficiency of a heat engine is

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25% to 30.5 %

35% to 45%

30% to 45%

15% to 25%

A body attached to a spring is pulled to a distance of 20 cm If the value of spring constant is 48 N m-1, the amount of force applied will be.

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4.8 N

9.6 N

96 N

192 N

What is the about the electric field inside a metallic sphere.

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It is zero

It varies with the shape of the conductor

It depends on the charge there

It does not charge the metallic sphere

In the experiment of photo electric effect the minimum frequency of photons at which electrons are emitted from a metal surface is called.

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Critical frequency

Typical frequency

Threshold frequency

Surface frequency

The maximum energy of photons emitted from ab X rays tube is certain to be increased by

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Increasing the voltage across the tube

Decreasing the voltage across the tube

Heating the metal target

Putting a barrier in the way of photons

Both xenon and cesium each have

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24 isotopes

28 isotopes

32 isotopes

36 isotopes

The ability's of convex lens to produce convergence in a parallel beam is called its.

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Magnification

Focal length

Power

Strength

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