Question # 1

If N is the total number of molecules and V is the volume of the container, then the expression for the pressure of gas is

Choose an answer

P=P/V<1/2mv²>

P=2N/V<1/2mv²>

P=2/3N/V<1/2mv²>

P=2/3N/V<mv²>

Self inducede e.m.f. is also called

Choose an answer

Motional e.m.f.

Thermistor

Electrostatic induction

Back e.m.f

The nature of capacity of electrostatic capacitor depends on

Choose an answer

Shape

Size

Thickness of plates

Area

The change of magnetic flux through a circuit will produce

Choose an answer

Magnetic Field

Electric Field

emf

a.c

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Choose an answer

decrease

increase

same

none of these

In which of the following components, pn-junction is used

Choose an answer

light emitting diode

photo diode

photo voltaic cell

all of these

When the pn-junction is connected reversed biased, its resistance is of the order of

Choose an answer

few ohms

few kilo-ohms

few mega-ohms

few mili-ohms

The modulus of elasticity can be written as

Choose an answer

stress x strain

strain/stress

1/2 x stress x strain

stress/strain

A stone is dropped from rest from the top of a tower 19.6 m high. The distance traveled during the last second of its fall is (giving g=9.8 m/s^s)

Choose an answer

9.8 m

14.7 m

4.9 m

19.6 m

If you are moving at relativistic speed between two points that are a fixed distance apart, then the distance between the two points appers

Choose an answer

larger

shorter

equal

none of these

The current through a metallic conductor is due to the motion of

Choose an answer

protons

neutrons

electrons

free electrons

Alternating current is produced by a voltage source which polarity:

Choose an answer

Remains the same

Reverse after period T

Keeps on reversing with time

Reverse after every time interval T/2

Both (C) and (D)

If denotes the total number of molecules in cubic vessel such that m is mass of each milecule and I is length of each side of vessel, then mN/I³gives the:

Choose an answer

Force

Density

Work done

Pressure

In a cubic crystal, All solids meet at:

Choose an answer

60^o

90^o

109^o

30^o

10^o

Which quantity is important in stating the entropy of the system

Choose an answer

initial entropy

final entropy

change in entropy

none of them

The SI unit of electric flux is

Choose an answer

Weber

Nm²C^-1

NmC^-1

Nm^-2C

A physical system under going forced vibrations is known as

Choose an answer

Simple harmonic oscillator

Compound harmonic oscillator

Physical harmonic oscillator

driven harmonic oscillator

If the volume of the gas is to be increased by 4 times, then

Choose an answer

Temperature and pressure must be doubled

At constant P the temperature must be increased by 4 times

At constant T the pressure must be increased by four times

It cannot be increased

The missing mass which is converted to energy in the formation of nucleus, is called

Choose an answer

packing fraction

mass defect

binding energy

none of these

For a body executing S. H. M, its

Choose an answer

momentum remains constant

potential energy remains constant

kinetic energy remains constant

total energy remains constant

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

Which of the following is not thermo dynamical function?

Choose an answer

Enthalpy

Work done

Gibb's energy

Internal energy

What is frequency of radio waves transmitted by a station, if the wavelength of those waves is 300 m?

Choose an answer

1 MHz

10 Hz

1 GHz

100000 Hz

If the objects of different masses move with the same velocity, then it is more difficult to stop the

Choose an answer

lighter of the two

massive of the two

any one of them

both of them

The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be

Choose an answer

2.0 x 10^-5/°C

4.0x10^-5/°C

6.0x10^-5/°C

2.33x10^-5/°C

A typical rocket ejects the burnt gases at speeds over

Choose an answer

400 ms^-1

40000m s^-1

40000 ms^-1

60000 ms^-1

The phenomenon of generation of induced emf is called:

Choose an answer

Electrostatic induced

Magnetic induced

Electromagnetic induced

Electric induced

Both A and C

The damping depends upon the

Choose an answer

amplitude

sharpness

both of them

none of them

The photon of radio-waves has energy of about

Choose an answer

1 Me V

1 Ke v

10^-10e v

10¹⁰e v

Gauss(G) is smaller unit of magnetic induction which is related to tesla(T) as

Choose an answer

IT = 10^-4G

IT = 10⁵G

IT = 10³G

IT = 10⁴G

Absolute temperature can be calculated by

Choose an answer

Means squares velocity

Motion of the molecule

Both A and B

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