(a) Yor are required to select a carbon resistor of resistance of % from a shopkeeper. What would be the sequence of colour bands required to code the desired resistor?
(b) Write two characteristic properties of the material of a meter bridge wire.
(c) What precautions do you take to minimize the error in finding the unkown resistance of given wire?
(a) %
5 stands for Green colour
6 stands for Blue colour
k implies and it stands for the orange colour
% implies silver colour
The first two colours indicate two significant figures 5 and 6. The third colour indicates decimal multiplier and the last colour indicates tolerance.
(b) The material of meter bridge wire is manganin or constantan
The characteristic properties include :
(c) To minimise error in finding the unknown resistance of the given wire, the precaution to be taken are: