Question # 1

The path of a projectile is a

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Straight line

Circle

Ellipse

Parabola

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 of the following phenomenon is observed in obtaining an X ray photograph of our hand.

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Photoelectric effect

Zeeman effect

Shadow photography

Ionization

The SI unit of mutual induction a

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Vs-1 A-1

V m -1 A-1

Henry

Tesla

The phenomenon of exactly zero electrical resistance occurring in certain materials below a characteristics temperature is called.

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Resistivity

Conductivity

Super conductivity

Volume resistivity

When a force of 4 N acts on a body of mass 2 kg for a time of 2 s, the rate of change of momentum is.

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2 kg ms -1

4 kg ms-1

8 kg m s-1

16 kg m s-1

Electrical energy is transmitted at high alternating voltages which of the following is not a valid reason for doing this.

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At high voltage a.c is safer than d.c.

For a given powers, there is lower current with higher voltage.

There is a smaller energy loss at high voltage and lower current

The transmission lines can be thinner with a lower current.

The use fulness of x rays is largely due to their

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Mass

Density

Penetrating power

Rest mass

Three tuning forks of frequencies 400 Hz. 401 Hz and 402 Hz are sounded together The frequency of beats per sound is.

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0

1

2

3

The process of mixing sound waves with carrier waves is known as.

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Rectification

amplification

Modulation

Demodulation

The nib of fountain pan is split of convey ink down the nib by the phenomenon of.

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Adhesion

Cohesion

Osmosis

Capillary

Low frequency response of an amplifier is mainly limited by.

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Biasing configuration

Coupling capacitor

By pass capacitor

Input impedance

Who provided theoretical explanation of a blackbody spectrum.

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Einstein

Planck

Wien

stefan

In any fluid the effect of decrease in pressure with the increase in speed in a horizontal pipe is known as

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Bernoulli's effect

Venturi effect

Torriculli's effect

Shift effect

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 internal energy of monoatomic gas is.

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3/2 RT

Independent of temperature

In the form of K.E.

Partially kinetic and partially potential

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

Sound wave in air are

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Longitudinal waves

Transvers waves

Electromagnetic waves

Matter waves

The susceptibility of a paramagnetic material is

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negative

Positive

Zero

Infinity

In case of longitudinal waves the individual particles of the medium move.

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In circles

In ellipses

Parallel to wave propagation

Perpendicular to wave propagation

At what speed the mass of a body will be doubled.

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0.67 C

0.77 C

0.87 C

0.97 C

In which of the following eddy current is not used

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Induction furnace

Automobile speedometer

Electromagnetic damping

X- rays diffraction

When did max planck suggest that energy is released or absorbed in discrete packets.

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1899

1900

1905

1911

Which of the following materials has highest magnetic suscaptibility.

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Uranium

aluminium

Platinum

Sodium

For the angular momentum of a system to remains constant, the external torque should be

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small

Large

Neither small nor large

zero

The addition of two or more waves is termed as

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Interferences

Period

Echo

Polarization

When stationary waves are formed in a closed organ pipe.

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A node is formed at the closed end of the pipe

An antinode is formed at the closed end of the pipe

Each particle at the node experience zero acceleration

The maximum pressure occurs at the nodes

Which scientist made the fist successful terrestrial measurement of the speed of light

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Isaac Newton

Ole Romer

Armand Fizeace

Albert Michelson

The path of electron in Rutherford atomic model according to classical theory a.

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Parabolic

Straight line

Spiral

Circular

The gas thermometer is taken as the primary standard because.

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Thermometers are easily reproducible

Readings can be accurately taken

No correction are necessary

It produces he thermodynamic scale

When velocity of the body is doubled, which one is doubled too.

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K.E.

P.E

Momentum

Acceleration

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