Kirchhoff's laws and combining resistors Quiz
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5 questions, one answer each
Each answer is checked as you go, with why.
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1. Three currents of 2.0 A, 3.0 A and 1.0 A enter a junction and one current leaves. What is it?
- A. 1.0 A
- B. 3.0 A
- C. 6.0 A
- D. 2.0 A
2. Resistors of 20 Ω and 30 Ω are in series across a 10 V supply. What is the current?
- A. 0.50 A
- B. 0.20 A
- C. 5.0 A
- D. 0.50 mA
3. Resistors of 6.0 Ω and 12 Ω are in parallel. What is the combined resistance?
- A. 4.0 Ω
- B. 18 Ω
- C. 9.0 Ω
- D. 0.25 Ω
4. Which conservation law is used to show that parallel branches have the same p.d.?
- A. Charge
- B. Momentum
- C. Mass
- D. Energy
5. A 12 Ω resistor is in series with a parallel pair of 6.0 Ω and 3.0 Ω resistors across 14 V. What is the p.d. across the parallel pair?
- A. 12 V
- B. 10 V
- C. 2.0 V
- D. 4.0 V