Electricity And Magnetism - Practice Test

(A) currents circulating inside the core

(B) presence of a huge magnet at its centre

(C) moving charges in space outside

(D) None of the above

(A) currents circulating inside the core

(A) Ohm's law is an assumption that current through a conductor is always directly proportional to the potential difference applied to it

(B) A conducting device obeys Ohm's law when the resistance of a device is independent of magnitude and polarity of applied potential difference

(C) A conducting material obeys Ohm's law when the resistance of material is independent of the magnitude and direction of applied electric field

(D) All homogeneous materials obey Ohm's law irrespective of whether the field is within range or strong

(D) All homogeneous materials obey Ohm's law irrespective of whether the field is within range or strong

(A) matter becomes radioactive

(B) a metal loses magnetic properties

(C) a metal loses conductivity

(D) transmutation of metal occurs

(B) a metal loses magnetic properties

(A) IL

(B) I 2 L

(C) IL -1

(D) IL -2

(C) IL -1

(A) 18 A

(B) 0.18 A

(C) 1.8 A

(D) 0.018 A

(B) 0.18 A

Electricity And Magnetism - Study Mode