Question

A) A student performs an experiment and plots the V-I graph of series and parallel combination

of two resistors. Which graph represents series combination of resistors? Justify your answer.

b) Define joules law of heating
c) 100 J of heat are produced each second in a 42 resistance. Find the potential difference
across the resistor.

Answer 1

b) Joule's law is that the heat evolved per second, or the electric power loss, P, equals the current I squared times the resistance R, or P = I2R. The power P has units of watts, or joules per second, when the current is expressed in amperes and the resistance in ohms.

Step-by-step explanation:

c) P= v2÷R

PR=V×V= 100×42=4200

v=sqroot 4200= 64.8volts