PDF chapter test TRY NOW
An electric iron consumes energy at the rate of 420\ W when heating is at the maximum rate and 180\ W when heating is at the minimum rate. The applied voltage is 220\ V. What is the current in each case?
[Note: Enter the answer up to two decimal places by rounding off the third decimal value].
The formula for power is
From the above formula, the value of current can be easily calculated.
Case 1:
Power, P = 420\ W
Voltage, V = 220\ V
Current = A
Case 2:
Power, P = 180\ W
Voltage, V = 220\ V
Current = A
Register for free to see more content