Question # 1

Which of the following is invariant under Galilean transformation.

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Velocity

Impulse

Momentum

Distance

An image formed on the film of camera is

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Real , inverted and diminshed

Virtual, inverted and diminshed

Real upright and diminished

Virtual, upright and idminshed

Image formed by a camera is

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Real, inverted, and diminished

Virtual, upright and diminished

Virtual, upright and magnified

Real, inverted and magnified

A body of mass 1 kg hanging with a spring of spring constant 60 N m-1 is rotation in a horizontal circle The values of angular frequency will be.

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80 .94 Hz

89. 4 Hz

98. 4 Hz

108 . 6 Hz

The specific heat of a substance is a function of its

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mass

Weight

Volume

Molecular structure

Marie Curie and Pierre Curie discovered two new radioactive elements which are.

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Uranium and radkum

Platinum and radium

Polonium and radium

Crypton and radon

A shell explodes and many pieces fly off in different directions, which of the following is conserved.

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Momentum

K.E.

Momentum and K.E

Neither momentum nor K.E.

When damping is small amplitude of vibrational resonance will be

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small

Large

Infinite

Un changed

In annitilation of matter, positron and electron pair disappears into two

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Alpha particles

Beta particles

Game particles

X-rays

X-rays used for

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Cutting boring and precision welding

Retina stitching in eye operations

Detecting heavy elements under the earth

Deflecting flaws in welding and casting

The addition of two or more waves is termed as

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Interferences

Period

Echo

Polarization

If the vector sum of all the torques is zero then

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1st condition is satisfied

2nd condition is satisfied

Centre of mass is lowered

Gravity becomes zero

Which principle is in effect when a ship displaces ocean water.

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Bernouli's

Pascal's

Hook's

Archimedes

The special theory of relativity was presented by

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Albert Einstein

Newton

Maxwell

Planck

An alternating current can be produced by

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Turbine

Electric motor

Generator

Trnasormer

Which one of the following describes a measure of opposition to alternating current.

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Electrical impedance

Capacitance

Inductance

Admittance

When a light ray enters from air into water then its wavelength.

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Increases

Decreases

Become infinity

Remains constant

Who is generally credited with the invention of first optical microscope.

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Hans Lippershery

Glavanni faber

Galileo

issac Newton

A force applied at centre of mass of a body

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Does not produce any torque

Produces torque

Produces acceleration

Produce couple

The maximum height reached by a projectile with a velocity of 14 m s-1 at an angle of 30 ^owith the horizontal is.

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1.5 m

2.5 m

1 m

2 m

In a R-L-C series circuit, when the frequency of A.C. source is high the circuit is.

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R-L Circuit

R-C circuit

L-C circuit

R-L or R-C

According to Coulomb's law what happens to the attraction of two oppositely charged objects as their distance of separation increases.

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Increase

Decrease

Remain unchanged

Cannot be determined

The process where by energy is dissipated from the oscillating system is called.

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Resonance

Damping

Forced oscillation

Free oscillation

Susceptance of a circuit is the reciprocal of.

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Admittance

Resistance

Reactance

Impedance

A forward based p-n semiconductor diode is called.

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Photodiode

Photovoltaic cell

Amplifier

Ligh emitted diode

Which physical properties is most responsible for resonance.

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Frequency

Intensity

Pitch

Loundness

A negative acceleration does not necessaryimply.

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Decreasing speed

An increasing distance

An increasing speed

A decreasing distance

According to Gauss's law the number of electric field lines crossing any closed surface is.

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numerically equal to the enclosed charge

Equal to the enclosed positive charge

Equal to teh electric field inside the surface

Equal to the charge density on the surface.

Which of the following is more viscous

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Air

Honey

Water

Milk

The critical mass of a fissionable material is.

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1 kg

10 kg

100 kg

1.,000 kg

A stretched wire with clamped ends has a fundamental frequency of 1,000 Hz. What will be the new fundamental frequency if tension in the wire is increased by 2%

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980 Hz

1,000 Hz

1,010 Hz

1,020 Hz

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