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Kirchhoff's Law

Authored by Aldrin Tan

Physics

12th Grade

Used 76+ times

Kirchhoff's Law
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5 questions

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1.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

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 QUESTION

3 mins • 1 pt

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 QUESTION

2 mins • 1 pt

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 QUESTION

3 mins • 1 pt

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 QUESTION

3 mins • 1 pt

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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