Question # 1

The charge carriers in electrolyte are positive and negative

Choose an answer

protons

electrons

ions

none of these

When a bicycle is in motion, the frictional forces exerted by the ground are

Choose an answer

In the forward direction on both the wheels

In the backward direction on both the wheels

In the forward direction on the front wheel and the backward direction on the rear wheel

In the backward direction on the front wheel and the forward direction on the rear wheel

The instantaneous velocity of a body moving along a circle is directed

Choose an answer

along the radius

along the tangent

away from the circle

none of them

A heavily damped system has a fairly

Choose an answer

sharp resonance curve

flat resonance curve

both of them

none of them

Avo-meter is used of measure the

Choose an answer

current, voltage

voltage, resistance

resistance, current

current, voltage and resistance

Which one of the following wave motions is transverse:

Choose an answer

Wave motion produced in water when a piece of stone is thrown into it

Pulling of weight hanging vertically with a spiral spring

Both of these

None of these

Waves transport energy

Choose an answer

without transport energy

with matter

both of them

none of them

Cause of heat production in a current carrying conductor is

Choose an answer

Collisions of free electrons with one another

High drift speed of free electrons

Collisions of free electrons with atoms or ions of conductor

High resistance value

Blood has a density

Choose an answer

Equal to water

Greater then water

Lesser then water

None of these

Which instrument is expensive and difficult to use?

Choose an answer

Voltmeter

Potentiometer

CRO

Both A and C

Both A and B

The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is

Choose an answer

10Ω

20Ω

30Ω

40Ω

What is another name for laminar flow?

Choose an answer

streamline

unsteady flow

turbulent flow

both (a) and (b)

When brakes are applied to a fast moving car, the passenger will be thrown:

Choose an answer

Forward

Backward

Downward

none of these

Substances that do not flow easily have

Choose an answer

large coefficient of viscosity

small coefficient of viscosity

either of them

none of them

The magnetism produced by electrons within an atom can arise from

Choose an answer

electrons orbiting the nucleus

electrons posses a spin

both motions

none of these motions

The value of the input resistance of OP-AMP is of the order of

Choose an answer

few ohms

few hundred ohms

several kilo ohms

several maga ohms

The waves which propagate by the collision of material particles are known as

Choose an answer

e.m. waves

mechanical waves

light waves

microwaves

Photoelectric effect takes place with a photon of:

Choose an answer

Very high energy

Very low energy

Low energy

High energy

None of these

In a heat engine, heat is supplied by the

Choose an answer

cold reservoir

sink

hot reservoir

none of them

In a voltmeter the conduction takes place due to

Choose an answer

Electrons only

Holes only

Electrons and holes

Electrons and ions

If 250V is the RMS value of alternative voltage, then its peak value V_owill be:

Choose an answer

353.5V

250V

175V

zero

400V

The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at

Choose an answer

100 K

273 K

0 K

-273 K

The percentage of available heat energy converted into work by a petrol engine is roughly

Choose an answer

35 %

40 %

35 to 40 %

25 %

The bridge circuit of full wave rectification uses

Choose an answer

one diode

two diode

three diode

four diode

The number if neutrons in the nucleus of ₉₂U²³⁵are

Choose an answer

Infinite

92

235

143

The magnetic force exerted on an electron moving with velocity 'v' at right angle to the magnetic field is given by

Choose an answer

F=eVB

F=e²V/B

F=e/VB

F=B²/ev

A rheostat can e used:

Choose an answer

As variable resistor

As potential divider

For varying the current

All of these

None of these

Internal energy is the sum of all the forms of

Choose an answer

K.E

P.E

both of them

none of them

The process which is carried out at constant temperature is known as

Choose an answer

adiabatic process

isothermal process

isochoric process

none of them

The solids are classified as:

Choose an answer

Metals

Crystalline

Amorphous

Polymeric

All except (A)

The analysis of fluid motion becomes simplified by using

Choose an answer

law of conservation

law of conservation of energy

both of them

none of them

More Classes

Other Links

ECAT Physics Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer