Question # 1

A measuring cylinder is used to measure.

Choose an answer

Mass

Area

Volume

Level of liquid

The bad conductor of heat is:

Choose an answer

Iron

Copper

Air

Aluminum

The conduction is due to:

Choose an answer

They have high boiling point

Vibration of atoms

They have high melting point

None of above

Two bodies of masses m₁ and m₁ attached to the ends of an inextensible string passing over a frictionless pulley such that both move vertically. The acceleration of the bodies is:

Choose an answer

m1 x m₂ / m₁ + m₂ g

m₁ - m₂ / m₁ + m₂ g

m₁ + m₂ / m₁ - m₃ g

None of these

Thermal conductivities of Lead

Choose an answer

23

30

35

85

A train is moving at a speed 36 kmh^-1 Its speed expressed in ms^-1

Choose an answer

10 ms^-1

20 ms^-1

25m ms^-1

30 ms^-1

Unit of pressure is :

Choose an answer

N/ m

Pa

N

m/N2

According to Archimedes, up thrust is equal to :

Choose an answer

Weight of displaced liquid

Volume of displaced liquid

Mass of displaced liquid

None of these

Water freezes at .

Choose an answer

0^o F

32 ^oF

-273 K

0 K

Convection of heat is a process of heat transfer due to;

Choose an answer

Random motion of molecules

Downward motion of molecules

Upward motion of molecules

Free motion of molecules

Air and water is conductor:

Choose an answer

Poor

Good

Excellent

None of these

The angle of which prism deviates the incident ray is called:

Choose an answer

angle of incident

angle of reflection

angle of deviation

angle of minimum deviation

The output of a NAND gate is 0 when:

Choose an answer

Both of its inputs are 0

Both of its inputs are 1

Any of its inputs is 0

Any of its inputs is 1

1 KB =______________

Choose an answer

1022 bytes

1023 bytes

1024 bytes

1025 bytes

The Half life of a certain isotopes is 1 day. What is the quantity of isotopes after 2 days?

Choose an answer

One half

One quarter

One eight

None of these

Which of the following is a method of energy transfer.

Choose an answer

Conduction

Reatiation

wave motion

all of these

After how much time the echo must be heard?

Choose an answer

0.1 s

0.10 s

0.20 s

0.50 s

The S.I unit of power of a lens is:

Choose an answer

Dioptre

Volt

Ampere

Watt

The waves, which are used to detect the broken bones are called:

Choose an answer

Light waves

x-rays

sound waves

both b and c

SI unit of electric potential is:

Choose an answer

Watt

Volt

Coulomb

Joule

In computer terminology information means.

Choose an answer

any data

raw data

processed data

large data

The distance of the object from the mirror is represented by :

Choose an answer

q

p

m

F

The relation between the speed and hoop can be written as

Choose an answer

2

4

1/2

1/4

The relation between linear and angular velocity is

Choose an answer

If a vector of magnitude 10 N along y-axis then its component along x-axis is

Choose an answer

0 N

5 N

8.66 N

10 N

The centripetal force is always directed

Choose an answer

Away from the centre along the radius

Along the direction of motion

Opposite to the motion of the body

Towards the centre along the radius

When temperature of source and sink of a heat engine becomes equal then the entropy change will be.

Choose an answer

zero

Minimum

Maximum

Negative

Two waves of same frequency and moving in the same direction produces.

Choose an answer

Interference

Diffraction

Beats

Stationary waves

The action and reaction never act on

Choose an answer

Same body

Two bodies

many bodies

All of these

Sound waves can not be

Choose an answer

Reflected

Refracted

Polarized

Diffracted

The ratio of the velocities of wate in a pipe lying horizontally at two ends is 1 : 4 The ratio of diameters of pipe at these two ends is.

Choose an answer

1 : 2

2 : 1

1 : 4

4 : 1

The weight of the body at the centre of earth is

Choose an answer

Maximum

Minimum

Zero

Infinite

The value of angular momentum is maximum when 0 is

Choose an answer

90^o

60^o

75^o

45^o

The electric field created by positive charge is

Choose an answer

Radially inward

Zero

Circular

Radially outward

Which of the following series of hydrogen spectrum lies in ultra violet region.

Choose an answer

Lyman sereis

Paschen series

Balmar series

Bracket series

When Ohm meter gives full scale deflection it indicates.

Choose an answer

Zero resistance

Infinite resistance

Small resistance

Very High resistance

A radio active substance has a half life of four months. 3 -fourth of the substance will decay in:

Choose an answer

6 months

8 months

12 months

16 months

The highest value reached by the voltage or current is one cycle is called:

Choose an answer

Peak to peak value

Peak value

Instantaneous value

Root mean square value

The energy equivalent of 1 kg of matter is about:

Choose an answer

10^-15 J

1 J

10^-12J

10^-17J

The AC system is preferred to DC system because:

Choose an answer

AC voltage can be easily changed in magnitude

DC motor angular velocity is affected badly

High voltage AC transmission is less efficient

Domestic appliance require AC voltage for their operation

The place for soring the nuclear waste is

Choose an answer

Ocean

Damping in earth

Damping in desert

Bottom of old salt mines

A substance having the negative temperature co efficient of resistivity out of the following is.

Choose an answer

Carbon

Iron

Tungsten

Gold

The unit of radioactivity is:

Choose an answer

Bequerel

Henry

Pascal

Joule

Energy density in an inductor is.

Choose an answer

Directly proportional to magnetic field

Directly proportional to square of magnetic field

Inversely proportional to magnetic field

Inversely proportional to square of magnetic field