Question # 1

A device used to measure the speed of liquid flow is known as

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barometer

speedometer

sphygmomanometer

venture-meter

A lift is descending at a constant speed V. A passenger in the lift drops a coin. The acceleration of the coin towards the floor will be

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Zero

g

-g

V + g

In an adiabatic expansion, the temperature of the gas

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increases

becomes zero

decreases

decreases rapidly

In a normal healthy person the value of systolic pressure is

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75 torr

80 torr

120 torr

all of them

A full-scale deflection is obtained in a galvanometer with a current of few

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ampere

volts

milliampere

ohm

The mass of the object is a quantities measure of its

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speed

velocity

acceleration

inertia

The device in which induced emf is statically induced emf is:

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Transformer

AC generator

Alternator

Dynamo

An atom in which there is a resultant magnetic field, behaves like a tiny magnet and is called as

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magnetic

magnetic dipole

magnetic monopole

none of them

In order to have a constant current through wire, the potential difference across its end should:

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Be zero

Be maintained constant

Goes on increasing

Go on decreasing

Both (A) and (B)

Polymeric solids have

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low specific gravity

high specific gravity

either of them

none of them

A railway engine (mass 10⁴kg) is moving with a speed of 73 km/h. The force which should be applied to bring it to rest over a distance of 20 m is

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3,600 N

7,200 N

10,000 N

100,000 N

A train is moving with a velocity of 25 m/s and a car is moving behind it by a velocity of 8 m/s in same direction. The relative velocity of train with respect to car is

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17 m/s

33 m/s

17.5 m/s

none

Physicist George Simon ohm was a

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German physical

French physicist

Chinese physicist

Russian physicist

From the theory of relativity, momentum p of the photon is related to energy as

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p = hfc

p = hf/c

p = f(hc,f)

p = cf/h

The materials in which there are plenty of free electrons for electrical conduction are known as

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conductors

insulators

semi-conductors

all of them

The total reactance of a series RLC circuit at resonance is

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zero

Equal to the resistance

Infinity

Capacitive

The critical temperature of mercury is

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1.18 K

4.2 K

3.72 K

7.2 K

The force exerted by the fluid in a hydraulic pump on the piston is 10 cm², the fluid pressure on the piston is, in N/cm²

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20

200

2000

20,000

CRO deflects the beam of

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proton

a-particle

electron

neutron

What is another name for laminar flow?

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streamline

unsteady flow

turbulent flow

both (a) and (b)

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

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-2 mv

Zero

2 mv

mv

At constant temperature, if the density of the gas is increased, its pressure will:

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One kg of a substance

Unit volume of a substance

One mole of a substance

None of these

The waves in which the particles of the medium have displacement along the direction of propagation of waves are called

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longitudinal waves

transverse waves

non-mechanical waves

none of them

When monochromatic light is allowed to fall on cathode, it begins to emit electrons, these electrons are called

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thermoionic electrons

free electrons

photoelectrons

slow electrons

The expression of Hook's law is

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F=ma

F=kx

F= -kx

-kx=ma

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

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2

3

5

6

Viscosity is defined as

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the friction between fluid and its container's walls

the internal friction between two layers of fluid

the resistance to flow a fluid experiences

the extent to which outside factors effect the fluid's flow

By which velocity a ball be projected vertically so that the distance covered by it in 5th seconds is twice the distance it covers in its 6th second ( g=10m/s²)

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58.8 m/s

49 m/s

65 m/s

19.6 m/s

Converse of pair production is known as

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Compton effect

annihilation of matter

photoelectric effect

none of these

The SI unit of current is

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watt

coulomb

volt

ampere

In a heat engine, heat is supplied by the

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cold reservoir

sink

hot reservoir

none of them

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