Indicate true or false in each of the following statements: (1) A conductor is r
ID: 1290028 • Letter: I
Question
Indicate true or false in each of the following statements:
(1) A conductor is required for a changing magnetic field to produce an electric field.
(2)When the current in a coil is suddenly cut off an emf is generated.
(3)The energy of a magnetic field depends on the conductor in the field.
(4)Current flows the instant a coil is connected to a battery.
(5An inductor, in which the electric current is changing, generates an emf whose sign is the same as the emf that is causing the current to flow in the inductor.
Explanation / Answer
(1) A conductor is required for a changing magnetic field to produce an electric field
Answer : true (changing magnetic field creates the electric field in the wire)
(2) True (when there is sudden change in magnetic flux , then an emf is generated )
(3) True
(4) false
5) False, the emf generated has a sign which is opposite to the emf that causes the change in magnetic flux.