Electromagnetic Fields Objective Questions – Set 2

The lines of force due to charged particles are

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

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

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

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

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

The Biot-savarts law is a general modification of

The attraction capacity of electromagnet will increase if the

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

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

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

Which of following is not a unit of flux?

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

Electric field inside a hollow metallic charged sphere

Unit of electric flux density is

XEROX machine is working on

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

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

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

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

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

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

The tubes of force within the magnetic material are known as

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

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

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

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

1 Tesla =