Question # 1

The work done by the system on its environment is considered as

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positive

negative

zero

any one of them

The values 1 and 0 are designated as:

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Continuous values

Binary values

Boolean values

Decimal values

Either (B) and (C)

In a metal, the valence electrons are:

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Attach to individual atoms

Not attached to individual atoms

Free to move within the metal

Both (A) and (C)

Both (B) and (C)

A galvanometer is an instrument used to

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measure voltage across a circuit

detect current in a circuit

measure current flowing through a circuit

none of these

A cold soft drink is kept on the balance. When the cap is opened, then the weight

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Increases

Decreases

First increases, then decreases

Remains same

A P-N juction or semiconductor diode cannot be used as

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A rectifier

Detector

Oscillator

An amplifier

If we increase the length of a simple pendulum four times, its time period will become

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2 times

3 times

4 times

6 times

Which quantity has the same dimension as that of impulse?

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KE

Power

Momentum

Work

A process in which no heat enters or leaves the system is called

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isochoric process

isothermal process

adiabatic process

none of them

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

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decrease

increase

same

none of these

The resistance of an incandescent lamp is

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Smaller when switched on

Greater when switched off

The same whether it is switch off or switch on

Greater when switched on

First law of thermodynamic is special case of

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Law of conservation of energy

Charle's law

Law of conservation of mass

Boyle's law

The minimum charge on any object can not be less than

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1.6 x 10^-19C

3.2 x 10^-19C

1.0 C

4.8 x 10^-19C

The velocity gained by the fluid in falling through the distance (h_{1 - h}_{2) under the action of gravity is equal to the speed of the action of gravity is equal to the speed of the}

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orifices

efflux

fluid

none of them

The temperature scale approved in SI units is:

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Celsius scale

Kelvin scale

Fehrenheit scale

None of these

The number of translation degress of freedom for a diatomic gas is

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2

3

5

6

What will be the ratio of the distance moved by a freely falling body from rest in 4th and 5th seconds of journey?

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4 : 5

7 : 9

16 : 25

1 : 1

In an ideal gas, the molecules have:

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Kinetic energy only

Potential energy only

Both KE and PE

None of these

The motion in a plane is the motion in

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one dimension

two dimension

three dimension

four dimension

The horizontal range of projectile, at a certain place, depends upon

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the mass of the projectile

velocity of projection

angle of projection

angle as well as velocity of projection

The magnetic field outside the solenoid due to current is

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strong

zero

weak

uniform

Which one of the following could be the frequency of ultraviolet radiation?

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1.0 x 10⁶Hz

1.0 x 10⁹Hz

1.0 x 10¹²Hz

1.0 x 10¹⁵Hz

Blood pressure is measured by the instrument

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stethoscope

sphygmomanometer

barometer

none of them

The magnetism produced by electrons within an atom can arise from

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electrons orbiting the nucleus

electrons posses a spin

both motions

none of these motions

Bernoulli's equation is based upon law of conversation of

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mass

momentum

Energy

None

the symbol to be used in relativity problems denotes:

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Dilated time

Proper time

Life time

Half time

None of these

At the top of the trajectory of a projectile the acceleration is

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The maximum

The minimum

Zero

g

(CRO) Cathode ray oscilloscope is a device used for high speed

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velocity

graph plotting

time-velocity

none of these

Surface density of charge is defined as

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Charge per unit volume

Charge per unit length

Charge per unit area

Charge per unit mass

Heat travels through vacuum by

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Conduction

Convection

Radiation

Both A and B

In case of metallic conductors, the charge carriers are

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Protons

Electrons

Antiprotons

Positrons

Both A and B

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