Conductor and Conductance MCQs

The amount of charge flow is influenced not only by the magnitude of the driving force (voltage) but also by how easily electrons or ions can move through the conductor. Materials that permit the flow of electricity are called conductors, while those that do not are referred to as non-conductors or insulators. Conductors remain unchanged when electric current passes through them, as they facilitate electricity flow through the movement of electrons. Metals and their alloys are excellent conductors due to their high conductivity.

With a rise in temperature, the resistance of semiconductors

(a) decreases
(b) increases
(c) first, increase and then decrease
(d) remains constant

The resistance of a conductor varies inversely as

(a) length
(b) area of cross-section
(c) temperature
(d) Resistivity

As temperature increases electrolytic conduction

(a) increases
(b) decreases
(c) remains unaffected
(d) none of the above

The element with the highest conductivity is

(a) gold
(b) silver
(c) copper
(d) platinum

The reciprocal of electrical resistance is

(a) voltage
(b) current
(c) conductance
(d) none of the above

Good conductors have many loosely bound

(a) atoms
(b) protons
(c) molecules
(d) electrons

In order to measure current in a resistance present in a circuit, the ammeter is connected

(a) in series
(b) in parallel
(c) in series or parallel
(d) nothing can be decided

The reciprocal of resistivity of a conductor is

(a) conductance
(b) capacitance
(c) conductivity
(d) none of these

The SI unit of specific resistance is

(a) ohm m
(b) ohm/m
(c) ohm/m2
(d) (ohm)-1

The unit of conductance cannot be expressed in

(a) mho
(b) (ohm)-1
(c) siemens
(d) ohm/m