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WorksheetsParallel Circuits & Junction Rule
Total questions: 15
Worksheet time: 22mins
What is the current through R1?
10 A
5 A
7 A
2 A
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
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
Select the correct statement:
The current in parallel resistors is always equal.
The sum of the sources of EMF and volt-drops in a closed loop is zero.
The sum of the currents in a closed loop is zero.
The sum of the voltages at a node is zero.
Points P and Q are connected to a battery of fixed voltage. As more resistors R are added to the parallel circuit, what happens to the total current in the circuit?
increases
remains the same
decreases
drops to zero
Current flows through a lightbulb. If a wire is now connected across the bulb, what happens?
all the current continues to flow through the bulb
half the current flows through the wire, the other half continues through the bulb
all the current flows through the wire
Kirchhoff's junction rule is a statement of ______
the law of conservation of momentum.
the law of conservation of energy.
the law of conservation of charge.
the law of ohms.
I T = 3
RT = 14
I T = 0.64
RT = 14
I T = 6.3
RT = 1.4
I T = 0.64
RT = 1.4
