Question # 1

The working of all DC electric meters (galvanometers, ammetersand voltmeters) depends upon

Choose an answer

Heating effect of current

Chemical effect of current

Magnetic effect of current

Electromagnetic effect of current

During the upward motion of the projectile, the vertical component of velocity:

Choose an answer

Decreases

Increases

Remains constant

None of these

The energy acquired by a mass of 1g moving with the speed of light is

Choose an answer

3 x 10⁸J

9 x 10¹³J

3 x 10¹³J

9 x 10¹⁶J

The number of field lines passing through unit area held perpendicular to the field lines represent:

Choose an answer

Flux in that region

Intensity of the field

Charge

Area of the region

None of these

Choose an answer

5μF

10μF

3μF

6μF

Drag force increases if speed of the object moving through the fluid:

Choose an answer

Increases

Decreases

Remains constant

None of these

The angle of deflection of coil can be measured by the

Choose an answer

one method

three method

two method

none of these

Curie is a unit of

Choose an answer

reluctance

resistivity

binding energy

radioactivity

Machine parts are jammed due to:

Choose an answer

Increasing in viscosity of lubricant

Decreasing in viscosity of lubricant

Decreasing in surface tension of lubricant

None of these

A digital system deals with quantities or variables which have

Choose an answer

only one state

only two discrete states

three discrete states

four discrete states

To convert galvanometer into ammeter we connect

Choose an answer

small resistance in parallel with galvanometer

small resistance in series with galvanometer

high resistance in series with galvanometer

high resistance in parallel with galvanometer

A hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?

Choose an answer

Zero

5μC m^-2

20μC m^-2

8μC m^-2

Efficiency of carnot engine is independent of the

Choose an answer

temperature of sink

temperature of source

nature of the working substances

none of them

The solids are classified as:

Choose an answer

Metals

Crystalline

Amorphous

Polymeric

All except (A)

Which of the following is most suitable as the core of transformer

Choose an answer

Soft iron

Alinco

Steel

None of these

Rutherford performed an experiment on nuclear reactions in:

Choose an answer

1718 A.D

1818 A.D

1918 A.D

2001 A.D.

1701 A.D.

In the expression of force experienced by electron, the direction of both v and B are

Choose an answer

parallel

zero

perpendicular

none of them

For a moving body, at any instant of time

Choose an answer

If the body is not moving the acceleration is necessarily zero

If the body is slowing, the retardation is negative

If the body is slowing, the distance is negative

If displacement, velocity and acceleration at that instant are known, we can find the displacement at any given time in future

The special theory of relativity is based on:

Choose an answer

Four postulates

Three postulates

Two postulates

One postulate

None of these

An irreversible heat flow from a hot to cold substances of a system, causes the disorder to

Choose an answer

decrease

remains the same

increase

any one of them

The sum of positive and negative peak values is called:

Choose an answer

Instantaneous value

Peak value

Rms valuie

Peak-to peak-value

None of these

While deriving the equation for pressure of a gas we consider the

Choose an answer

rotational motion of molecules

vibrational motion of molecules

linear motion of molecules

all of them

Associated with the motion of a driven harmonic oscillator, there is a very striking phenomenon, know as

Choose an answer

waves

beat

interference

resonance

A mass difference of 0.0012 u is equivalent to and energy of:

Choose an answer

0.5 Me V

1.13 MeV

5.13 MeV

1.13 keV

1.13 eV

Whenever a covalent bond breaks, it creates:

Choose an answer

An electron

A hole

An electron-hole pair

A positron

All of these

At higher frequency of the alternating current, the capacitive reactance X_c

Choose an answer

Increases

Decreases

Remains the same

Increases only when the voltage increases

The magnitude of the force producing an acceleration of 10 m/sec²in a body of mass 500 grams is:

Choose an answer

3 N

4 N

5 N

6 N

Examples of moderators used in a fission reactor is/are:

Choose an answer

Water

Heavy water

Carbon

Hydrocarbon

All of these

The Nobel Prize on the explanation of photoelectric effect was awarded to:

Choose an answer

Max. Planck

Maxwell

Bohr

Rutherford

None of these

Which quantity has the same units as impulse

Choose an answer

force

work

linear momentum

acceleration

The arrangement or molecules or atoms in a crystalline solid can be studied by using:

Choose an answer

Chemical methods

Neutrons

X-ray techniques

Copper atoms

Both (A) and (B)

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