Question

. A copper wire and nichrome wire of same length and area of cross - section are connected

in two circuits as shown.

a. Identify the circuit having more current (1)

b. Find out the wire in which more heat is generated. Give reason.​

Answer 1

Answer:

circuit 1

Explanation:

becoz nichrome is a rehostatand copper is a conductor

Answer 2

Explanation:

a) clearly Circuit 1 st has high current

reason

because copper is one of the best conductors ie it has high conductance and as we know resistance is inversely proportional to conductivity so

nichrome wire offerse more resistant (that why used in heater ) than copper wire

so nichrome has less conductance and copper has high conductance

**** conductance is property of materials which allows flow of current

b) clearly Circuit 2. offers more heat coz heat is directly proportional to

resistance and resistance is inversely proportional to conductance

as stated earlier nichrome has less conductance and copper has high conductance

so nichrome wire has more resistant thus more heat