Solution:
For heater A: …(i)
For heater B:
….(ii)
From (i) and (ii),
When heaters are connected in series:
Heat produced:
…..(iii)
From (i) and (iii), H = 100 kJ
Two heaters A and B are in parallel across the supply voltage. Heater A produces 500 kJ in 20 minutes and B produces 1000 kJ in 10 minutes. The resistance of A is If the same heaters are connected in series across the same voltage, then total heat produced in 5 minutes
will be
For heater A: …(i)
For heater B:
….(ii)
From (i) and (ii),
When heaters are connected in series:
Heat produced:
…..(iii)
From (i) and (iii), H = 100 kJ