Question # 1

The current in microamperes required to produce one millimeter deflection on a scale placed one meter away from the mirror of the galvanometer, defined the sensitivity of

Choose an answer

ammeter

voltmeter

galvanometer

avo-meter

The direction of induced current is always so as to oppose the cause which produces it. This is

Choose an answer

Lenz's law

Ampere's law

Faraday's law

Coulomb's law

None of these

.Depletion region contains:

Choose an answer

Protons

Positive ions

Negative ions

Both (B) and (C)

Both (A) and (C)

Viscosity of water is ______ that of air but ___ that of plasma.

Choose an answer

More, more

Less, more

Less, less

More, less

According to the law of conservation of linear momentum, the total linear momentum of an isolated system

Choose an answer

increases

decreases with time

remains constant

none of them

There is certain frequency below which no electrons are emitted from the metal surface, this frequency is known as

Choose an answer

maximum frequency

minimum frequency

threshold frequency

all of these

A stationary sound wave has frequency 165 Hz (speed of sound in air = 330 m/s) then distance between two consecutive nodes is

Choose an answer

2 m

1 m

0.5 m

4 m

A high concentration of red blood cells increases its viscosity from

Choose an answer

3 - 5 times that of mercury

5 - 8 times that of mercury

3 - 5 times that of water

5 - 8 times that of water

The unit of work function is:

Choose an answer

Joule

Electron volt

That of threshold frequency

Both (A) and (B)

None of these

Which of the following is a state variable

Choose an answer

entropy

pressure

volume

all of them

When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates

Choose an answer

Decreases

Increases

No change

May increase or decresase

Acceleration produced in a body by the force varies

Choose an answer

inversely as the applied force

directly as the applied force

directly as the mass of the body

none of them

When platinum wire is heated, then at the temperature of 500 ^oC, it becomes:

Choose an answer

Yellow

Orange red

Dull red

White

Cherry red

In AND gate, the output is 1 if:

Choose an answer

Both inputs are 0

Both inputs are 1

Only one input is 0

Both (A) and (B)

Both (A) and (C)

Equal charges are given to two spheres of different radii. The potential will

Choose an answer

Be more on the smaller sphere

Be more on the bigger sphere

Be equal on both the sphere

Depend on the nature of the material of the sphere

A water hose with an internal diameter of 20 mm at the outlet discharges 30 kg of water in 60 s. What is water speed at the outlet if density of water is 1000 kg/m³during its steady flow

Choose an answer

1.3 m/s

1.6 m/s

1.9 m/s

2.2 m/s

A boat of mass 40 kg is at rest, A dog of mass 4 kg moves in the boat with a velocity of 10 m/s. What is the velocity of boat?

Choose an answer

4 m/s

2 m/s

8 m/s

1 m/s

In equation F=ma, then mass 'm' is

Choose an answer

rest mass

variable mass

inertial mass

gravitational mass

There is present in paraffin a large amount of:

Choose an answer

Nitrogen

Hydrogen

Carbon

Baryllium

Lithium

The example/s of non-electrical energy to electrical is/are:

Choose an answer

Chemical energy

Mechanical energy

Heat energy

Both (A) and (B)

All of these

Which is modified form of galvanometer

Choose an answer

potentiometer

battery

voltmeter

slide wire bridge

The coefficient of linear expansion of iron is 0.000011 per°K. An iron rod is 10 metre long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to

Choose an answer

0°C

10°C

17°C

20°C

Force is a:

Choose an answer

Scalar quantity

Base quantity

Derived quantity

None of these

In a semi-conductor material, current flows due to

Choose an answer

positive charge

negative charge

both of them

none of them

Which of the following options correctly states the equation of continuity for an ideal fluid?

Choose an answer

A₁A₂= V₁V₂

A₁/A₂= V₂/V₁

A₁/A₂= V₁/V₂

none of the above

The entire wave form of sinusoidal voltage is actually a set of all the:

Choose an answer

Positive maximum value + V_oand negative maximum value -V_o

Posiotive maximum value +V_oand zero

Zero and negative maximum value -V_o

Any of these

None of these

The time required to complete on vibration is called

Choose an answer

frequency

total time

time period

velocity

A potential barrier of 0.7 V exists across p-n junction made from:

Choose an answer

Germanium

Silicon

Arsenic

Gallium

Indium

The results of mechanical tests are usually expressed in terms of

Choose an answer

stress

strain

stress and strain

neither strees nor strain

The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10^-19N, is

Choose an answer

25

225

625

1250

An induced current can be produced by:

Choose an answer

Constant magnetic field

Changing magnetic field

Varying magnetic field

Constant electric field

None of these

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