Question # 1

Before and after nuclear reaction the number of protons and neutrons:

Choose an answer

Must be different

Must be decreased

Must be increased

Remains same

In chopke coil the resistance X_L an resistance R are:

Choose an answer

X_L=R

X_L<<R

X_L>>R

X_L=∞

Radius of first orbit of an atom is r1= 0.053 nm, Radius of second orbit r2 will be.

Choose an answer

0.106 nm

0.212 nm

0.053 nm

0.53 x 10^-10 nm

Which series lies in the ultraviolet region.

Choose an answer

Balmer series

Bracket series

Ptund series

Lyman series

Torque on a current carrying coil

Choose an answer

τ=IBA cos

τ = ILB sinα

τ = IBA sinα

τ = ILBcosα

SI unit of electric flux is.

Choose an answer

NmC¹

Nm^-1 C¹

Nm²C^-1

Nm³C²

Using relativistic effects the location of an air craft after an hour fight can be predicated about

Choose an answer

20 m

50 m

760 m

780 m

A.C. can be converted into D.C. by

Choose an answer

An oscillator

Detector

An amplifier

Rectifier

Resistance of choke is

Choose an answer

zero

Large

Very small

Infinite

If 13.6 eV energy is required to ionize the hydrogen atom, then the required energy to remove an electron from n=2 is:

Choose an answer

10.2 eV

0 eV

3.4 eV

6.8 eV

The emf induced by the motion of a conductor across a magnetic field is called:

Choose an answer

Motional emf

Rotational emf

Induced emf

All of above

During negative half cycle of A.c then p-n junction offers.

Choose an answer

High resistance

Low resistance

No resistance

All of these

1 gray is equal to.

Choose an answer

1 JKg-1

1KgJ-1

1JKg

1 JKg-2

Due to polarization, electric field E.

Choose an answer

Increase

Decrease

First increases then decreases

Remain same

The device which are required to convert various physical quantities into electric voltage are called.

Choose an answer

Filters

Rectifiers

Amplifiers

Sensors

The domain theory of magnet is important to explain the behaviour of

Choose an answer

Diamagnets

Paramagnets

Ferromagnets

All of these

The induced emf in a coil is proportional to:

Choose an answer

Magnetic flux through the coil

Rate of change of Magnetic flux through the coil

Area of the coil

Product of magnetic flux flux and area of the coil

Choose an answer

Wien's constant

Planck's constant

Davison constant

Lumber's constant

More Classes

Other Links

Physics ICS Part 2 Online MCQ's 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