Advertisements
Advertisements
Question
Name the material which is the best conductor of electricity.
Solution
Silver is the best conductor of electricity.
APPEARS IN
RELATED QUESTIONS
Find the expression for resistors connected in series.
A piece of wire of resistance R is cut into five equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination is R’, then the ratio `"R"/"R'"` is ______.
Write any two characteristics of a series combination of resistors.
How does the presence of impurities in a metal affect its resistance?
Draw a V-I graph for a conductor at two different temperatures. What conclusion do you draw from your graph for the variation of resistance of conductor with temperature?
State how are the two resistors joined with a battery when equivalent resistance is more than either of the two resistances.
Name the following substances:
(i) Showing low resistivity,
(ii) Showing very high resistivity,
(iii) Showing moderate resistivity.
What do you mean by power rating of an electrical appliance? How do you use it to calculate
(a) the resistance of the appliance and
(b) the safe limit of the current in it, while in use?
State and explain the laws of resistance.
