Electric Current and Ohm’s Law questions with answers are among the most common electronics aptitude questions in GATE, SSC JE, and RRB JE exams. This topic explains the fundamental relationship between voltage, current, and resistance — the backbone of electrical circuit analysis. Understanding Ohm’s Law and its applications helps solve both theoretical and numerical questions efficiently. Here, you’ll find well-explained problems covering resistivity, conductance, and real-world circuit examples to improve your technical proficiency.
Electric Current and Ohm's Law
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25 questions
1. The unit of electric current is
A) Volt
B) Watt
C) Ampere
D) Ohm
Answer: Option C
Hints: Electric current is measured in amperes (A), which represents the rate of flow of electric charge.
Answer: Option B
Hints: Ohm's Law states that voltage across a conductor is directly proportional to the current through it, with resistance being the constant of proportionality (V = IR).
Answer: Option C
Hints: Potential difference, also known as voltage, is measured in volts (V) and represents electrical pressure or electromotive force.