Question # 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

The direction of electric field line surround the test charge -q id

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Parallel

Perpendicular

Radially outward

Radially inward

What units are used to rate electrical fuses.

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Volts

Ampere

Watts

Hertz

Which is the correct statement regarding the nature of light.

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It has wave nature

It has particle nature

It has both wave and particle nature at the same time

It has wave nature sometime and particle nature at some other time.

If pressure and temperature of an ideal gas is doubled and volume is halved, the number of the gas molecules.

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Become half

Remain constant

Become double

Become three times

Which particle are not emitted by a radioactive substance.

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Alpha particles

Beta particles

Gama particles

Neutrons

The power of convex lens is 10 d. At what distance the 3 times larger image is formed.

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9.6 cm

2.3 cm

13.3 cm

17.6 cm

The gravitational field strength at a point p on the earth's surfae is numerically equal to.

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The acceleration of free fail at p

The change in P.E. per unit distance at P

The work done in bringing unit mass from infinity to P

Which of the following quantities is discrete according to Bohr's hypothesis.

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Momentum

Potential energy

Angular velocity

Angular momentum

Which of the following cannot be polarized.

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Ultraviolet rays

Radio waves

T.V waves

Sound waves

A ball is thrown straight up when the ball reaches the highest point.

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Both is velocity and acceleration are zero

In velocity os zero but acceleration is not zero.

It acceleration is zero but velocity is not zero.

Neither velocity nor acceleration is zero.

When ever a system is made to complete a cyclic process the work done during the complete cycle.

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Is zero

Is negative

Is positive

Depends upon the path followed

In the equation P = IV cos Theta Cos theta is known as

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Phase angle

Liming angle

Phase

Power factor

A charged particles moving in a magnetic field experiences a resultant force.

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Proportional to its K.E.

In the direction of the field

In the direction opposite to its motion

In the direction perpendicular to both the field and its motion

A device used to detect and measure charge is.

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A voltmeter

An ammeter

An electroscope

An amplifier

The electric bulb does not obey Ohm's law because.

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Current changes

Resistance changes

Heat is produced

All of these

Though the wavelength of X-rays is smaller than that of visible light yet the speed of X-rays in vacuum is.

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longer that that of visible light

Smaller than that of visible light

Same as that of visible light

Unpredictable

Interference effects of light were verified by

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Thomas Young

Newton

Bragg

Huygen

Resonance phenomenon in a vibrating body

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May increase the amplitude

May decrease the amplitude

May not affected the amplitude

All of the above

The length of piano wire is 1 m and mass is 20 g and it is stretched by a fore of 200 N the fundamental frequency of sound waves produced by the piano will be

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50 Hz

100 Hz

150 HZ

250 Hz

The process of combining low frequency signals with high frequency radio waves is called.

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Modulation

Resonance

Fluctuation

Amplitude

Beats occurs because of.

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Reflection

Refraction

Interference

Doppler's effect

What will be the sound speed if the frequency is doubled.

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zero

Half

Double

Unchanged

The output of a generator which uses a split ring commutator is.

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sinusoidal A.C. wave

Pulsating D.C. wave

Constant D.C Voltage

Linerly increasing voltage.

What is generated when air moves an air foil.

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Thrust

Lift

Drag

Turbulence

Which one is not a semiconductor.

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Go As

Ge

Sc

In

The steady current which produces the same heating effect in a resistance in a given time as the alternating current does in the same resistance in the same time is called.

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Induced current

Root mean square value of an alternating current

Mean value of alternating current

Electromotive force

What is measured by the energy dissipated when a source drives a unit charge round a complete circuit.

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Electromotive force

Potential difference

Power

Resistance

X-rays are absorbed maximum by

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Paper

Copper

Steel

Lead

In a compound microscope magnification will be large if focal length of eyepiece is

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Large

small

Equal to that of the objective

Larger than that of the objective

What is the amount of mechanical work done to melt 1 g of ic completely

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4.2 J

42 J

80 J

336 J

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