Online Test

Question # 1

The chemical changes produced in a liquid depends upon

Choose an answer

Nature of the liquid

Quantity of electricity passed

Time for which the current passing

All of them

In mutual induction, the mutual inductance of the two coils depends upon

Choose an answer

Number of turns

Area of cross section of coil

The distance between the two coils

All of them

Vectors are those physical quantities which requires

Choose an answer

Magnitude

Magnitude and directions

Direction

None of these

Period of vibration of an atom in a solid is

Choose an answer

1 × 10^-10 sec

_{1 × 10}^-13_sec

1 × 10^-16 sec

1 × 10^-19 sec

The colour of platinum wire changes to yellow at

Choose an answer

1000°C

1200°C

1300°C

1800°C

Which of the following is conserved when light waves interfere

Choose an answer

Intensity

Energy

Amplitude

Momentum

Which of the following phenomenon proves the particle nature of light?

Choose an answer

interference

diffraction

photoelectric effect

none of them

In space sound waves cannot travel because there is:

Choose an answer

Air

Gravity

Light

Vaccum

If Young s double slit experiment is immersed in water then the fringes with

Choose an answer

Decreases

Remains unchanged

Becomes infinite

Increases

If voltage of 3.5 is applied to gate it will accept it as

Choose an answer

Low

High

Maximum high

None of these

Pauli's exclusion principle states that no two atomic electrons can:

Choose an answer

Be in the same orbital

Be in the same shell

Have same values of all the quantum numbers

Have same angular momentum

Aluminium is a:

Choose an answer

Good insulator

Bad conductor

Both A and B

Excellent conductor

Semi conductor

The magnitude of i² in scalar product is

Choose an answer

Zero

1

Less than 1

Greater than 0

When m₂>> m₁and V_{2 = 0 then result of their velocities}

Choose an answer

V₂= 0 and V₁= V'₁

V'₁= -V₁and V'₂= 0

V₁= V₁and V₂= 0

None of these

The velocity-time graph is a horizontal straight line when the velocity of the car is

Choose an answer

zero

constant

decreasing

increasing

Frequency is the term used for

Choose an answer

Number of vibrations for second

Time to take one vibration

Number of vibrations per minute

None of these

The unit of torque in SI system is

Choose an answer

Newton-meter

Dyne-meter

Newton

Joul

The wave form of SHM is

Choose an answer

Pulsed wave

Square wave

Triangular waved

Sine wave

Exclusive NOR gate can be obtained by inverting the output of

Choose an answer

XOR gate

NOT gate

AND gate

None of these

Polymers have chemically combinations with

Choose an answer

Carbon

Nitrogen

Hydrogen

All of them

Wave nature of particle was proposed by

Choose an answer

Einstein

plank

de-Brogile

Maxwell

A typical rocket consumes about

Choose an answer

100 kg s^-1of fuel

1000 kg s^-1of fuel

10000 kg s^-1of fuel

100000 kg s^-1of fuel

Two row boats moving parallel in the same direction and pulled toward each other due to the application of Bernoulli's equation

Choose an answer

Stake's theorem

Toricelli's theorem

Venturi relation

None of these

Direct current cannot flow through the capacitor continuously because of

Choose an answer

Dielectric

Vacuum

Insulating medium

None of these

Time:

Choose an answer

Is an absolute quantity

Is relative

Depends upon motion of frame of reference

All of above

None of these

When the difference between the frequencies of two tuning forks is 10, then

Choose an answer

we will hear 10 beats per second

we will hear 5 beats per second

we will hear 20 beats per second

it becomes difficult to recognize the beats

The relation for the adiabatic change is

Choose an answer

PV = Constant

PV²= Constant

PV^r= Constant

PV^-r= Constant

The dimensional formula of light year is

Choose an answer

LT^-1

T

ML²T^-2

L

In an adiabatic process

Choose an answer

Temperature remains constant

Volume remains constant

No change of internal energy

No heat enters for leaves the system

For the conversion of heat into work, the two bodies are essential as temperature which is

Choose an answer

Similar

Very little difference

Large difference

None of these

The emf produce by motion of a coal across a magnetic field is called

Choose an answer

Induced emf

Self induced emf

Motional emf

emf

The mass of fissionable material required for self sustaining chain reaction is called the

Choose an answer

atomic mass

fermi mass

critical mass

super critical mass

The magnitude of the drift velocity is of the order of:

Choose an answer

10^-6ms^-1

10^-3ms^-1

10³ms^-1

10⁶ms^-1

None of these

The devices in the circuit that consume electrical energy are known as

Choose an answer

Inductor

Capacitor

Load

None of these

An un-power and un-guided missile is called a

Choose an answer

rocket

ballistic missile

guided missile

none of them

A beams of electrons and protons move parallel to each other in the same direction then they:

Choose an answer

Attract each other

Repel each other

No relation

Neither attract nor repel

Momentum is a parameter associated with

Choose an answer

wave motion

particle motion

neither wave nor particle motion

none of them

If one ampere current flows through long conductor terminal, the potential change is

Choose an answer

negative

positive

zero

none of them

An ammeter requires 50 μA for full scale deflection it is to be converted into a voltmeter to read 10 volt at full range what resistance should be connected in series with the ammeter

Choose an answer

200 KΩ

400 KΩ

600 KΩ

800 KΩ

1 year = ______.

Choose an answer

3.1536 x 10⁷s

3.1536 x 10^-7s

3.1536 x 10¹⁰s

3.1536 x 10^-10s

The first band indicates the

Choose an answer

first digit

zero digit

decimal multiplier

first two digits