Kirchoff's First Law

Presentation

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Physics

•

9th - 12th Grade

•

Practice Problem

•

Medium

Mr Math n Physics

Used 4+ times

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4 Slides • 8 Questions

KIRCHOFF'S 1^STLAW

By Mr Math n Physics

Kirchoff's First Law

Kirchhoff’s first law is an expression of the conservation of charge. The idea is that the total amount of charge entering a point must exit the point.

In a series circuit,the currentis the same at any point

Current in a series circuit

In a parallel circuit, the current divides at the junctions and each branch has a different value. Kirchhoff’s first law applies at each junction

Current in a parallel circuit

Multiple Choice

A circuit consisting of five identical resistors is shown. Which of the following statements is false?

The potential difference between P and Q is equal to the potential difference between X and Y

The total resistance between X and Y is equal to the sum of the resistances between X and Y

The total resistance between P and Q is equal to the sum of the resistances along P and Q

There is less total resistance between P and Q than there is between X and Y

Multiple Choice

A circuit consisting of five identical resistors is shown. Which of the following statements is false?

current entering A = current entering B + current entering C

current entering D = current entering E

current entering P = current entering X

current entering P = current leaving Q

Multiple Choice

A cell of e .m .f. 2.0 V and negligible internal resistance is connected to a network of resistors as shown. What is the equivalent resistor on the circuit?

4.0 Ω

3.0 Ω

1.5 Ω

1.3 Ω

Multiple Choice

A cell of e .m .f. 2.0 V and negligible internal resistance is connected to a network of resistors as shown. What is the current I ?

1.0 A

1.5 A

2.0 A

2.5 A

Multiple Choice

A cell of e .m .f. 2.0 V and negligible internal resistance is connected to a network of resistors as shown. What is the current I₁ ?

0.50 A

0.75 A

1.0 A

1.25 A

Multiple Choice

A cell of e .m .f. 2.0 V and negligible internal resistance is connected to a network of resistors as shown. What is the current I₂ ?

0.25 A

0.50 A

0.75 A

1.0 A

Multiple Choice

A cell of e .m .f. 2.0 V and negligible internal resistance is connected to a network of resistors as shown. What is the current I₃ ?

0.25 A

0.50 A

0.75 A

1.0 A

Multiple Choice

The diagram shows part of a current-carrying circuit. The ammeter has negligible resistance. What is the reading on the ammeter ?

0.7 A

1.3 A

1.5 A

1.7 A

KIRCHOFF'S 1^STLAW

By Mr Math n Physics

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Kirchoff's First Law

KIRCHOFF'S 1ST LAW

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KIRCHOFF'S 1^STLAW

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