Description : Which of the following is expected to have the maximum permeability ? (a) Brass (b) Copper (c) Zinc (d) Ebonite
Last Answer : (d) Ebonite
Description : Which of the following is not a unit of flux? (a) Maxwell (b) Telsa (c) Weber (d) All of the above
Last Answer : (b) Telsa
Description : The magnetism left in the iron after exciting field has been removed is known as (a) permeance (b) residual magnetism (c) susceptance (d) reluctance
Last Answer : (b) residual magnetism
Description : Which of the following is the unit of magnetic flux density ? (a) weber (b) lumens (c) tesla (d) none of the above
Last Answer : (c) tesla
Description : The relative permeability is less than unity is case of (a) ferromagnetic materials (b) ferrites (c) non-ferrous materials (d) diamagnetic materials
Last Answer : (d) diamagnetic materials
Description : Reciprocal of permeability is (a) reluctivity (b) susceptibility (c) permittivity (d) conductance
Last Answer : (a) reluctivity
Description : The working of a meter is based on the use of a permanent magnet. In order to protect the meter functioning from stray magnetic fields (a) meter is surrounded by strong magnetic fields (b) a soft ... is used (c) a plastic shielding is provided (d) a shielding of anon-magnetic material is used
Last Answer : (b) a soft iron shielding is used
Description : Gilbert is a unit of (a) electromotive force (6) magnetomotive force (c) conductance (d) permittivity
Last Answer : (6) magnetomotive force
Description : Ferrites are a sub-group of (a) non-magnetic materials (6) ferro-magnetic materials (c) paramagnetic materials (d) ferri-magnetic materials
Last Answer : (d) ferri-magnetic materials
Description : Which of the following is a ferromagnetic material ? (a) Tungsten (b) Aluminium (c) Copper (d) Nickel
Last Answer : (d) Nickel
Description : In the left hand rule, forefinger always represents (a) voltage (b) current (c) magnetic field (d) direction of force on the conductor
Last Answer : (c) magnetic field
Description : Two infinitely long parallel conductors in vacuum any separated 1 metre between centers >then a current of 1 ampere flows the. uk each conductor, produce on each other a force of (a) 2 x 1(T2 N/m) (b) 2 x KT3 N/m (c) 2 x 10"5 N/m (d) 2x 1(T7 N/m)
Last Answer : (d) 2x 1(T7 N/m)
Description : The substances which have a large number of free electrons and offer a low resistance are called (a) insulators (b) inductors (c) semi-conductors (d) conductors
Last Answer : (d) conductors
Description : Electric pressure is also called (a) resistance (b) power (c) voltage (d) energy
Last Answer : (c) voltage
Description : The S.I. unit of power is (a) Henry (b) coulomb (c) watt (d) watt-hour
Last Answer : (c) watt