The voltage across the 15 ohm resistor is 30 V. What is the current in the resistor and how much

The voltage across the 15 ohm resistor is 30 V. What is the current in the resistor and how much heat will it generate in 5 minutes?

Given:

R = 15 Ohm – resistor resistance;

U = 30 Volts – voltage at the ends of the resistor;

t = 5 minutes = 300 seconds – time span.

It is required to determine I (Ampere) – current strength, as well as Q (Joule) – how much energy will be released on the conductor during time t.

Let’s find the strength of the current passing through the conductor:

I = U / R = 30/15 = 2 Amps.

The power will be equal to:

W = I * U = 2 * 30 = 60 watts.

The amount of released energy will be equal to:

Q = W * t = 60 * 300 = 18000 Joules.

Answer: the current strength is 2 Amperes, in 5 minutes 18000 Joules of energy will be released on the conductor.