1000+ Current Electricity Objective Questions and Answers Pdf - 1

Question: 1

Which of the following materials has the least resistivity?

(A) copper

(B) mercury

(C) lead

(D) zinc

Question: 2

The condition for the validity under Ohm’s law is that

(A) temperature at positive end should be more than the temperature at negative end

(B) resistance must be wire wound type

(C) current should be proportional to the size of the resistance

(D) resistance must be uniform

Question: 3

International ohm is defined in terms of the resistance of

(A) the unit length of wire

(B) a cube of copper

(C) a cube of carbon

(D) a coulomb of mercury

Question: 4

Resistance of carbon filament lamp _____ as the applied voltage increases.

(A) decreases

(B) increases

(C) remains same

(D) none of the above

Question: 5

Insulating materials have the function of

(A) storing very high currents

(B) conducting very large currents

(C) preventing an open circuit between the voltage source and the load

(D) preventing a short circuit between conducting wires