Question # 1

Alfa particles are

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hydrogen nuclei

helium nuclei

electrons

photons

At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:

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Double

Remains constant

Half

None of these

On heating, glass gradually softens into a paste like before it becomes a very viscous liquid at almost

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600°C

7600°C

800°C

900°C

Substances that flow easily have

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large coefficient of viscosity

small coefficient of viscosity

either of them

none of them

The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is

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21 x 10³+ 10%

23 x 10¹+ 10%

21 x 10³+ 5%

12 x 10³+ 5%

The fourth band is a:

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Silver band

Red band

Gold band

Either A or C

Either A or B

A high concentration of red blood cells increases its viscosity from

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3 - 5 times that of mercury

5 - 8 times that of mercury

3 - 5 times that of water

5 - 8 times that of water

Angular frequency 'w' is basically a characteristics of

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linear motion

circular motion

both of them

none of them

A changing magnetic flux creates around itself

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An electromotive force

An electric field (changing electric flux)

Magnetic field

None of the above

A particle having mass and charge equal to that of an electron is called:

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Proton

Positron

Pion

Pi-meson

Both (C) and (D)

Smaller the damping, the resonance will be

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more flat

more sharp

both of them

none of them

The speed of sound in a medium depends on

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The elastic property but not on the inertia property

The inertia property but not on the elastic property

The elastic property as well as the inertia property

Neither the elastic property nor the inertia property

If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy

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0 J

2 J

5 J

10 J

The time period of pendulums of different lengths would be

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same

different

both of them

none of them

Linear momentum is a

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fixed quantity

constant quantity

scalar quantity

vector quantity

Tick the one which is not polymer solid:

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Zirconia

Polythene

Nylon

Synthetic rubber

None of these

At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be

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81 K

355 K

627 K

627°C

One coulomb of charge is created by

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10 electrons

1.6 x 10^-19electrons

6.25 x 10¹⁸electrons

6.25 x 10²¹electrons

At absolute temperature, the kinetic energy of the molecules

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Becomes zero

Becomes maximum

Becomes minimum

Remain constant

On a cold morning a metal surface will fell colder to touch than a wooden surface, because

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Metal has high specific heat

Metal has high thermal conductivity

Metal has low specific heat

Metal has low thermal conductivity

Two conductors having the same type of charges are connected by a conducting wire. There would not be any amount of charges on them if

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They have the same potential

They have the same amount of charge

They have the same capacity

They have the same shape

The waves which propagate through the oscillations of material particles are known as:

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Mechanical waves

Electromagnetic waves

Any of them

None of them

SI unit of current describes the flow of charge at the rate of

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One ampere per second

One coulomb per second

One electron per second

6.25 x 10¹⁸electrons per second

Both B and D

The positron was discovered by:

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In cosmic radiation

In 1932

By Carl Anderson

All above

By direc

The vibratory or oscillatory motion of a body is

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translatory motion

back and forth motion about its mean position

free all motion

circular motion

Within each domain, the magnetic field of all the spinning electrons are

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parallel

antiparallel

perpendicular

all of them

The basic circuit elements of A.C circuit are

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Resistor

Inductor

Capacitor

All the three

Which of the following four statements is false?

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A body can have zero velocity and still be accelerated

A body can have a constant velocity and still have a varying speed

A body can have a constant speed and still have a varying velocity

The direction of the velocity of a body can change when its acceleration is constant

The units of modulus of elasticity are

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Nm^-2

Nm

ms^-1

Pascal

The discuss used by athlete has a mass of 1 kg, its weight in newton is

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9.8 N

80 N

98 N

100 N

The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as

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voltmeters

resistance

electrode

current

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