Applied Ohm’s Law and Basic Calculations Test | Questions And Answers With Verified Rationales | 2026/27 Qs & Ans | Digital Pdf Download

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Applied Ohm’s Law and Basic Calculations Test
| Questions And Answers With Verified
Rationales | 2026/27 Qs & Ans | Digital Pdf
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1. What is Ohm’s Law formula?

A. P = IV
B. V = IR
C. I = PR
D. R = VI²
Answer: B. V = IR
Rationale: Ohm’s Law relates voltage, current, and resistance.




2. If V = 10V and R = 5Ω, current is:

A. 0.5A
B. 2A
C. 5A
D. 15A
Answer: B. 2A
Rationale: I = V/R = 10/5 = 2A.




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3. If I = 3A and R = 4Ω, voltage is:

A. 7V
B. 12V
C. 1.3V
D. 24V
Answer: B. 12V
Rationale: V = IR = 3 × 4 = 12V.




4. Resistance is calculated as:

A. R = V/I
B. R = IV
C. R = I/V
D. R = P/V
Answer: A. R = V/I
Rationale: Rearrangement of Ohm’s Law.




5. If V = 24V and I = 6A, resistance is:

A. 2Ω
B. 3Ω
C. 4Ω
D. 6Ω
Answer: C. 4Ω
Rationale: R = 24/6 = 4Ω.




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6. A circuit has 12V and 3Ω resistance. Current is:

A. 36A
B. 9A
C. 4A
D. 1A
Answer: C. 4A
Rationale: I = 12/3 = 4A.




7. If current doubles and resistance is constant, voltage:

A. Halves
B. Doubles
C. Stays same
D. Becomes zero
Answer: B. Doubles
Rationale: V = IR increases with current.




8. If resistance increases, current:

A. Increases
B. Decreases
C. Stays same
D. Becomes infinite
Answer: B. Decreases
Rationale: Inverse relationship in Ohm’s Law.




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9. A 9V battery with 9Ω resistance produces current:

A. 0.5A
B. 1A
C. 2A
D. 9A
Answer: B. 1A
Rationale: I = 9/9 = 1A.




10. If I = 5A and V = 20V, resistance is:

A. 2Ω
B. 4Ω
C. 5Ω
D. 25Ω
Answer: B. 4Ω
Rationale: R = 20/5 = 4Ω.




11. Power formula using Ohm’s Law is:

A. P = V/R
B. P = I²R
C. P = R/I
D. P = V/I
Answer: B. P = I²R
Rationale: Derived from P = IV and V = IR.




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