Question: A circuit has a total resistance of 20Ω and a current of 2A flowing through it. What is the voltage across the circuit? (2023)
Options:
30V
40V
20V
10V
Correct Answer: 40V
Exam Year: 2023
Solution:
Using Ohm\'s law, V = I * R = 2A * 20Ω = 40V.
A circuit has a total resistance of 20Ω and a current of 2A flowing through it.
Practice Questions
Q1
A circuit has a total resistance of 20Ω and a current of 2A flowing through it. What is the voltage across the circuit? (2023)
30V
40V
20V
10V
Questions & Step-by-Step Solutions
A circuit has a total resistance of 20Ω and a current of 2A flowing through it. What is the voltage across the circuit? (2023)
Step 1: Identify the values given in the problem. We have a total resistance (R) of 20 ohms (Ω) and a current (I) of 2 amperes (A).
Step 2: Recall Ohm's law, which states that Voltage (V) = Current (I) * Resistance (R).
Step 3: Substitute the values into the formula: V = 2A * 20Ω.
Step 4: Calculate the multiplication: 2 * 20 = 40.
Step 5: Conclude that the voltage (V) across the circuit is 40 volts (V).
Ohm's Law – Ohm's Law states that the voltage (V) across a conductor is directly proportional to the current (I) flowing through it and the resistance (R) of the conductor, expressed as V = I * R.
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