Question # 1

The alternative voltage of current is actually measured by:

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Its RMS value

Square root of its mean square value

Instantaneous value

Peak value

Both (A) and (B)

The pattern of NaCl particles have a shape which is :

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Cubic

Body centred cubic

Simple cubic

face centred

Both (A) and (C)

Coulomb force, when any material medium is placed between two charges

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Increases

Decreases

Remain unchanged

None of these

Example of progressive wave is

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transverse waves

longitudinal waves

both of them

none of them

How many number of anodes used in electron gun

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one

two

three

six

In a straight current carrying conductor, the direction of magnetic field can be found by

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right hand rule

left hand rule

head to tall rule

none of these

Dimensions of velocity are

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[L]

[T]

[LT^-1]

[LT^-2]

At what temperature the adiabatic change is equivalent to the isothermal change?

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Zero degree Celsius

Zero Kelvin

Critical temperature

Above critical temperature

If denotes the total number of molecules in cubic vessel such that m is mass of each milecule and I is length of each side of vessel, then mN/I³gives the:

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Force

Density

Work done

Pressure

In case of metallic conductors, the charge carriers are

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Protons

Electrons

Antiprotons

Positrons

Both A and B

When temperature increase, the frequency of a tuning fork

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Increases

Decreases

Remains same

Increase or decreases depending on the material

The earth's potential is taken as

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Negative

Positive

Zero

Infinite

When low energy photon interact with a metal,which of the following effect is likely to be taken place

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pair production

photoelectric

Compton effect

None of these

The nature of thermal radiation is similar to:

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Ultraviolet rays

Light rays

Both of them

None of these

The law of conservation of mass gives us the

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equation of continuity

Bernoulli's theorem

both of them

none of them

The _____ viscous the medium is _____, is the value of terminal velocity of the droplet:

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More, lesser

Lesser, more

Both A and B

Lesser, lesser

If the flow is incompressible and the flow is steady then the mass of the fluid through the pipe

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increases

decreases

becomes zero

is conserved

A black body is

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an ideal absorber

an ideal radiator

both of them

none of them

Aluminum is a:

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Good insulator

Bad conductor

Both (A) and (B)

Excellent conductor

Semiconductor

Resistance is measured in

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volts

ampere

ohm

watt

Battery is charged in motor cars, which is based on

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Chemical effect

Magnetic effect

Electric effect

None

The inside cavity of the black body is

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painted white

painted silver

blackened with soot

painted red

Referring to above figure, due to change in current in the coil P, the change in magnetic flux:

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Is associated with coil P

Is associated with coil S

Causes an induced current is coil S

All of these

None of these

Capacitance of two or more capacitors

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Increases in series combination

Increases in parallel combination

Remains unchanged

None of the above

In the expression F x t, the force F is

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total force

instantaneous force

average force

all of them

In radio-active decay, the original element which disintegrate to another element is called

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element

daughter element

parent element

none of these

The entire wave form of sinusoidal voltage is actually a set of all the:

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Positive maximum value + V_oand negative maximum value -V_o

Posiotive maximum value +V_oand zero

Zero and negative maximum value -V_o

Any of these

None of these

A solenoid is a coil of wire which is:

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Short, loosely wound, cylindrical

Long, tightly wound, spherical

Long, loosely wound, cylindrical

Long, tightly wound, cylindrical

None of these

When sound waves travel from air to water which of these remains constant?

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Velocity

Frequency

Wavelength

All the above

The number of isotopes of hydrogen are

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2

1

3

4

Hydrogen and helium of same volume V at same temperature T and same pressure P are mixed to have same volume V. The resulting pressure of the mixtures will be

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R/2

P

2P

Depending on the relative mass of the gases

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