Home / CIE AS & A Level Physics : 10.2 Kirchhoff’s laws- Exam style question – Paper 1

# CIE AS & A Level Physics : 10.2 Kirchhoff’s laws- Exam style question – Paper 1

### Question

Each of Kirchhoff’s two laws presumes that some quantity is conserved.

Which row states Kirchhoff’s first law and names the quantity that is conserved?

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### Question

In the circuit shown, the cells have negligible internal resistance and the reading on the galvanometer is zero.

What is the value of resistor R?

A   $$2.0\, \Omega$$          B  $$6.0\, \Omega$$           C   $$12\, \Omega$$          D   $$18\, \Omega$$

Ans:

### Question

Two batteries are connected together, as shown.

Battery 1 has electromotive force (e.m.f.) 12V and internal resistance 0.3Ω.
Battery 2 has e.m.f. 9V and internal resistance 0.1Ω.
What are the e.m.f. and the internal resistance of a single battery that has the same effect as the combination?

 e.m.f. /V internal resistance/Ω ABCD 332121 0.20.40.20.4

Ans:

### Question

In the circuit shown, the 6.0V battery has negligible internal resistance. Resistors R1 and R2 and
the voltmeter each have a resistance of 100 $$k\omega$$.

What is the current in the resistor $$R_2$$?
A 20 $$\mu A$$           B 30 $$\omega A$$            C 40 $$\omega A$$            D 60 $$\omega A$$