A circuit has a resistance of 4 ohms and a current of 2 A. What is the voltage a
Practice Questions
Q1
A circuit has a resistance of 4 ohms and a current of 2 A. What is the voltage across the circuit?
2 V
4 V
6 V
8 V
Questions & Step-by-Step Solutions
A circuit has a resistance of 4 ohms and a current of 2 A. What is the voltage across the circuit?
Step 1: Identify the values given in the problem. We have a resistance (R) of 4 ohms and a current (I) of 2 A.
Step 2: Recall Ohm's Law, which states that Voltage (V) = Current (I) × Resistance (R).
Step 3: Substitute the values into the formula. Here, I = 2 A and R = 4 ohms.
Step 4: Calculate the voltage by multiplying the current and resistance: V = 2 A × 4 ohms.
Step 5: Perform the multiplication: 2 × 4 = 8.
Step 6: Conclude that the voltage across the circuit is 8 volts.
Ohm's Law – Ohm's Law states that the voltage (V) across a conductor is directly proportional to the current (I) flowing through it, with resistance (R) as the proportionality constant, expressed as V = I × R.
