Electric Current and Ohm's Law Questions and Answers
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
11. The reciprocal of resistance is known as
- A) Capacitance
- B) Resistivity
- C) Conductance
- D) Inductance
13. When the temperature of a metallic conductor increases, its resistance
- A) Decreases
- B) Increases
- C) Remains constant
- D) Becomes zero
14. The resistance of an ideal conductor is
- A) Zero
- B) One
- C) Infinite
- D) Very high
15. The resistance of an ideal insulator is
- A) Zero
- B) Low
- C) Infinite
- D) Moderate
16. The total resistance of resistors in series is
- A) Less than smallest resistor
- B) Product divided by sum
- C) Sum of all resistances
- D) Inverse of sum
17. The total resistance of resistors in parallel is
- A) The sum of all resistances
- B) Greater than highest resistor
- C) Less than smallest resistor
- D) Product of all resistances
18. The power consumed by a resistor is given by
- A) P = IV
- B) P = IR
- C) P = I²R
- D) Both A and C
19. The device used to change resistance in a circuit is
- A) Transformer
- B) Rheostat
- C) Capacitor
- D) Relay
20. The rate of flow of electric charge is known as
- A) Potential difference
- B) Electric current
- C) Resistance
- D) Conductance