Question

State Joules Law of heating effect of current.
if n resistor eah of resistance R is given, how will you combine them
to get - (i) Maximum (ii) Minimum effective resistance? What is
the rate of maximum resistance to minimum resistance?​

Answer 1

Answer:

Joule’s law states the amount of heat production in a conductor is :

Directly proportional to the square of electric current flowing through it.

Is directly proportional to the resistance of the conductor.

Directly proportional to the time for which electric current flows through the conductor.

N resistors in parallel=¹/R+¹/R... N

=N/R

Therefore=R/N

This is minimum resistance

N resistors in series = R+R+.......N

=NR

This is maximum resistance

Rate→NR/R/N

=N²

Answer 2

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Joule’s law states the amount of heat production in a conductor is :

Directly proportional to the square of electric current flowing through it.

Is directly proportional to the resistance of the conductor.

Directly proportional to the time for which electric current flows through the conductor.

N resistors in parallel=¹/R+¹/R..N

=N/R

Therefore=R/N

This is minimum resistance

N resistors in series = R+R+..N

=NR

This is maximum resistance

Rate→NR/R/N

=N²

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