Electric Current and Its Effects Questions and Answers - 2

Question: 6

The emf induced in a circuit is

(A) Inversely proportional to the rate of flux change

(B) Inversely proportional to the flux change

(C) Directly proportional to the rate of change of flux

(D) Directly proportional to the change in magnetic flux

Question: 7

1 Watt hour is equal to

(A) 3.6x10³ J

(B) 3.6x10⁴ J

(C) 3.6x10⁸ J

(D) 3.6x10⁵ J

Question: 8

Resistance of a conductor depends on

(A) Both the material and the dimensions of the conductor

(B) Material of the conductor only

(C) Thickness of the conductor only

(D) Length of the conductor only

Question: 9

The primary cell widely used is

(A) Lechlanche cell

(B) Lead acid accumulator

(C) Dry cell

(D) Daniel cell

Question: 10

Electromagnets are based on the principle of

(A) Chemical effect of current

(B) Magnetic effect of current

(C) Heating effect of current

(D) Mechanical effect of current