Question: A 12V battery is connected across a 4Ω resistor. What is the current flowing through the resistor? (2020)
Options:
2A
3A
4A
6A
Correct Answer: 2A
Exam Year: 2020
Solution:
Using Ohm\'s law, I = V/R = 12V / 4Ω = 3A.
A 12V battery is connected across a 4Ω resistor. What is the current flowing thr
Practice Questions
Q1
A 12V battery is connected across a 4Ω resistor. What is the current flowing through the resistor? (2020)
2A
3A
4A
6A
Questions & Step-by-Step Solutions
A 12V battery is connected across a 4Ω resistor. What is the current flowing through the resistor? (2020)
Step 1: Identify the voltage (V) from the battery, which is 12 volts.
Step 2: Identify the resistance (R) of the resistor, which is 4 ohms.
Step 3: Use Ohm's law formula, which is I = V / R, to find the current (I).
Step 4: Substitute the values into the formula: I = 12V / 4Ω.
Step 5: Calculate the result: 12 divided by 4 equals 3.
Step 6: Conclude that the current flowing through the resistor is 3 amperes (A).
Ohm's Law – Ohm's Law states that the current (I) through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R) of the conductor.
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