Question # 1

Above the curie temperature, iron becomes

Choose an answer

ferromagnetic

paramagnetic

diamagnetic

any one of them

An example of photoconductor is:

Choose an answer

Boron

Carbon

Iron

Aluminum

Selenium

When a mass 'm' is pulled slowly through a distance 'x_o' , the elastic potential energy of the spring would be

Choose an answer

P.E=Kx²_o

P.E= 1/2kx_o

P.E=1/2Kx²_o

P.E=Kx²_o

The transition from solid to liquid is actually from:

Choose an answer

Order to disorder

Disorder to order

Order to order

Disorder to disorder

None of these

When a conductoris moved across a magnetic field:

Choose an answer

Emf induced its similar to that of a battery

Emf induced gives rise to induced current

An emf is induced across its ends

All are correct

None of these

The law of conservation of energy gives us

Choose an answer

equation of continuity

Bernoulli's theorem

both of them

none of them

The resistance offered by a fluid to a solid moving inside it is called:

Choose an answer

Drag force

Surface force

Viscosity

None of these

How many number of anodes used in electron gun

Choose an answer

one

two

three

six

The speed of sound in a medium depends on

Choose an answer

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

A car travels first half distance between two places with a speed of 30 km/h and remaining half with a speed of 50 km/h. The average speed of the car is

Choose an answer

37.5 km/h

10 km/h

42 km/h

40 km/h

At O° K which of the following properties of a gas will be zero?

Choose an answer

Kinetic energy

Potential energy

Vibrational energy

Density

If v is the velocity of flow of liquid through a tube of area of cross-section A, then according to equation of continuity

Choose an answer

v/A = constant

A/v = constant

Av = constant

None

In a transistor, the central region is called

Choose an answer

collector

emitter

base

none of them

The three equation of motions are useful only for

Choose an answer

linear motion with increasing acceleration

line motion with uniform acceleration

linear motion with zero acceleration

linear motion with varying acceleration

At high speed, fluid friction _____ and fuel consumption ___,:

Choose an answer

Increases, decreases

Increases, increases

Decreases, increases

None of these

Battery is charged in motor cars, which is based on

Choose an answer

Chemical effect

Magnetic effect

Electric effect

None

Amount of heat required to raise the temperature of a body through 1 K is called its

Choose an answer

Specific heat

Water equivalent

Thermal capacity

Entropy

In the case of an incompressible fluid in stead flow the net rate of flow of mass entering one end of the tube of flow is equal to the net rate of flow of mass leaving the other end. This equation is called

Choose an answer

Quadratic equation

Equation of discontinuity

Equation of continuity

None of the above

The mass 'm' of a body moving at 0.8 c (whose rest mass is mo) becomes

Choose an answer

2 mo

1.67 mo

0.67 mo

2.67 mo

Change in momentum is one second is called:

Choose an answer

Impulse

Force

Energy

Work

First law of thermodynamic is special case of

Choose an answer

Law of conservation of energy

Charle's law

Law of conservation of mass

Boyle's law

Electrons of an isolated atom are bound to the nucleus, and

Choose an answer

can only have distinct energy level

can only have same energy level

may or may not have distinct energy levels

none of these

Maric Curie and Pieree Curie discovered two new radioactive elements, which are called

Choose an answer

polonium uranium

uranium and radium

polonium and radium

none of these

If current through conductor is 1 A and length of conductor is 1m placed at right angle to the magnetic field, then the strength of magnetic field is

Choose an answer

F = B²

F = 0

F = B

F = B/2

An aircraft is moving with a velocity of 300 ms^-1. If all the forces acting on it are balanced, then

Choose an answer

It still moves with the same velocity

It will be just floating at the same point in space

It will be fall down instantaneously

It will lose its velocity gradually

A rheostat can e used:

Choose an answer

As variable resistor

As potential divider

For varying the current

All of these

None of these

The number of different crystals systems based on the geometrical arrangement of their atoms and the resultant geometrical structure are

Choose an answer

5

7

9

14

The half life of uranium-238 is

Choose an answer

6.2 x 10⁹years

4.5 x 10⁹days

4.5 x 10⁹years

1.3 x 10⁶years

The consumption of energy by a 1000 watt heter in half an hour is:

Choose an answer

5 Kwh

0.5 Kwh

2.5 Kwh

3.2 Kwh

Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10Ωwhen a potential difference of 20 V is applied between its ends

Choose an answer

120 C

240 C

20 C

4 C

When a platinum wire is heated, it appears orange red at

Choose an answer

500°C

900°C

1100°C

1300°C

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