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- 1. Multiple Choice
An electrical junction has three wires A, B and C connected to it. Wire A carries 4.2 A going in, wire B carries 2.6 A going out. What does wire C carry?
1.6 A going in
1.6 A going out
6.8 A going in
6.8 A going out
- 2. Multiple Choice
A closed loop contains 2 batteries and two resistors. The batteries produce 3 V and 4.5 V respectively. If the voltage across one resistor is 1 V what could the voltage across the second resistor be? (Hint: polarity)
1 V
7.5 V
0.5 V
1.5 V
- 3. Multiple Choice
An electrical junction has four wires A, B, C and D connected to it. Wire A carries 7A going in, wire B carries 5 A going out and wire C carries 2 A going in. What does wire D carry?
10 A going out
5 A going out
4 A going in
4 A going out
- 4. Multiple Choice
Current is shared between two resistors of 3 Ω and 6 Ω, if the current in the 6 Ω is 12 A what is the total incoming current?
24 A
36 A
18 A
72 A
- 5. Multiple Choice
Analysis of a circuit produces two loop equations:
10x + 30y = 7 and 40x - 20y = 0
What are the currents x and y?
x = 50 and y = 10
x = 0.2 and y = 0.1
x = 0.01 and y = 0.02
y = 0.2 and x = 0.1
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