Problem 5: A 10 watt resistor has a value of 120 Ω. What is rated current through the resistor?
Quite easy. The resistance of the resistor and its power is given. Maximum current (rated current is the maximum allowed current) is to be found.
Given Power = P = 10 watt Resistance = R = 120
Required Current = I =?
Power is defined as P = VI = I2R
Put the values