With rise in temperature the resistance of semi-conductors_________________?
(A) decreases
(B) increases
(C) first increases and then decreases
(D) remains constant
With rise in temperature the resistance of pure metals______________?
(A) increases
(B) decreases
(C) first increases and then decreases
(D) remains constant
The resistance of a conductor varies inversely as___________?
(A) length
(B) area of cross-section
(C) temperature
(D) resistivity
Conductance is reciprocal of____________?
(A) resistance
(B) inductance
(C) reluctance
(D) capacitance
The property of a conductor due to which it passes current is called___________?
(A) resistance
(B) reluctance
(C) conductance
(D) inductance
Out of the following which is an insulating material____________?
(A) Copper
(B) Gold
(C) Silver
(D) Paper
Out of the following which is not a poor conductor__________?
(A) Cast iron
(B) Copper
(C) Carbon
(D) Tungsten
The substances which have a large number of free electrons and offer a low resistance are called____?
(A) insulators
(B) inductors
(C) semi-conductors
(D) conductors
Which of the following statement is true both for a series and a parallel D. C. circuit?
(A) Elements have individual currents
(B) Currents are additive
(C) Voltages are additive
(D) Power are additive
Two resistors are said to be connected in series when___________?
(A) same current passes in turn through both
(B) both carry the same value of current
(C) total current equals the sum of branch currents
(D) sum of IR drops equals the applied
(D) m.f.