Advertisements
Advertisements
Question
The substance having infinitely high electrical resistance is called:
(a) conductor
(b) resistor
(c) superconductor
(d) insulator
Solution
(d) insulator
A substance having infinitely high electrical resistance is called an insulator.
APPEARS IN
RELATED QUESTIONS
Why is the series arrangement not used for domestic circuits?
Find the equivalent resistance between A and B
What is the equivalent resistance between A and B in the given circuit (Fig?)
State the effect of rise in temperature on the resistance of semi-conductors.
State expression for Resistance connected in series.
State a relation between electrical power, resistance and potential difference in an electrical circuit.
Two lamps of resistance 30Ω and 20Ω respectively are connected in series in a 110V circuit. Calculate:
(i) the total resistance in the circuit
(ii) the current in the circuit, and
(iii) the voltage drop across each lamp.
Two wires of same material and same lengths have radii in the ratio of 2 : 3, Compare their resistances.
Two wires of the same length and area made of two materials of resistivity ρ1 and ρ2 are connected in series to a source of potential V. The equivalent resistivity for the same area is: