Question: What is the current through a 10 Ω resistor if the voltage across it is 30 V?

Options:

1. 3 A
2. 1 A
3. 5 A
4. 2 A

Correct Answer: 3 A

Solution:

Using Ohm\'s Law: I = V/R = 30 V / 10 Ω = 3 A.