Electric Current and Ohm's Law Questions and Answers

Take Exam

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

Showing 10 of 25 questions

1. The unit of electric current is

  • A) Volt
  • B) Watt
  • C) Ampere
  • D) Ohm
Show Answer Report

2. Ohm's Law defines the relationship between

  • A) Voltage, Current, and Power
  • B) Current, Voltage, and Resistance
  • C) Resistance, Inductance, and Capacitance
  • D) Charge, Energy, and Power
Show Answer Report

3. The SI unit of resistance is

  • A) Ampere
  • B) Volt
  • C) Ohm
  • D) Coulomb
Show Answer Report

4. If resistance increases, for a constant voltage, current will

  • A) Increase
  • B) Decrease
  • C) Remain same
  • D) Become zero
Show Answer Report

5. The potential difference is measured in

  • A) Watt
  • B) Ohm
  • C) Volt
  • D) Ampere
Show Answer Report

6. A conductor has resistance 10 Ω and current 2 A flows through it. The potential difference is

  • A) 5 V
  • B) 10 V
  • C) 20 V
  • D) 2 V
Show Answer Report

7. Which of the following is a good conductor?

  • A) Glass
  • B) Silver
  • C) Rubber
  • D) Wood
Show Answer Report

8. The instrument used to measure current is

  • A) Voltmeter
  • B) Ammeter
  • C) Galvanometer
  • D) Wattmeter
Show Answer Report

9. The instrument used to measure voltage is

  • A) Voltmeter
  • B) Ammeter
  • C) Rheostat
  • D) Multimeter
Show Answer Report

10. Resistance of a conductor depends on

  • A) Length and area
  • B) Color
  • C) Shape only
  • D) Temperature only
Show Answer Report
Questions and Answers for Competitive Exams Various Entrance Test