Two resistors having equal resistances are joined in series and a current is passed through the combination. Neglect any variation in resistance as the temperature changes. In a given time interval.
|
When current passes through a resistor, the heat produced by Joule’s heating effect is given by-
where,
I =current
R = resistance of the resistor
t = time for which current is flowing
When the resistors are in series, the current through them will be same.
So, the amount of thermal energy evolved in the resistors is same for each of the resistor.
The rise or fall in the temperature of the resistance will depend on the shape and size of the resistor.
So, the rise in the temperature of the two resistances may become equal.
1