Electromagnetic Fields Objective Questions – Set 2

The electrostatic force between two charges of one coulomb each and placed at a distance of 0.5 m will be

The force required to seperate two surfaces with a contact area measuring 5 cm by 6 cm, when flux density normal to the surface is 0.8 tesla, will be

Electric field inside a hollow metallic charged sphere

Which of following is not a unit of flux?

The tubes of force within the magnetic material are known as

1 Tesla =

The Biot-savarts law is a general modification of

Electric intensity at any point in an electric field is equal to the ___________ at that point.

The number of Faraday tubes of flux passing through a surface in an electric field is called

A conductor of length 1 metre moves at right angles to a magnetic field of flux density 1 Wb / m² with a velocity of 25 m / s. The induced emf in the conductor will be

Two parallel plates are separated by a distance of d meter and voltage pap plied across the is V volts. The field intensity is given by

A point charge in space is attracted towards a dielectric material because of the

Which of the following expression is correct for electric field strength?

XEROX machine is working on

The electric field on a plane is decribed by V = 20 [ (1 / r) + ( 1/r²) ]. The field due to

A charge which when placed in vacuum from an equal and similar charge repels with a force of 9 × 10³ N, is known as

The ability of charged bodies to exert force on one another is attributed to the existence of

How does the magnetic compass needle behave in a magnetic field?

The lagging of flux density behind the applied magnetising force is known as

Coulombs law for the force between electric charges most closely resembles with

A magnetic material has a total flux B of 80 micro Wb with an mmf of 160 AT. The reluctance in ampere turn per weber is

The magnetic vector potential due to a single conductor carrying current is

The attraction capacity of electromagnet will increase if the

The lines of force due to charged particles are

Voltage applied across a dielectric produces an electrostatic field 50 times greater than air. The dielectric constant of the dielectric will be

_________________ at a point may be defined as equal to lines of force passing normally through a unit cross-section at that point

The magnetism left in the iron after exciting field has been removed is known as

The energy stored in the magnetic field at a solenoid 10cm long and 4cm diameter wound with 2000 turns of wire carrying a current at 20 A, is

Unit of electric flux density is

Two coils have inductances L₁ = 1200 mH and L₂ = 800 mH. They are connected in such a way that flux in the two coils aid each other and inductor is measured to be 2500 mH then Mutual inductor between the coils is ___________ mH