The resistance in a radio is 10 ohms. The electric current passing through the radio measures 21 amps. What is the voltage?

Answer 1

Sure to do this childish problem you need to apply Ohms law V = IR, and you are done.

However, the person, who gave the problem, does not understand the current of 21 amp inside the radio. Let me tell you that 0.15 mA can kill the human. So, I do not understand who is giving problems with these unrealistic numbers.

Please be careful! Never ever approach the radio where the current of 21 A rules.

Answer 2

V = I·R = 21A·19Om = 210 V