IB Physics HL B.5.13 Series and Parallel Circuits Question Bank

Practise IB Physics HL B.5.13 by solving mixed resistor networks, potential-divider readings and power changes when circuit branches are altered.

Exam points

Solve mixed networks by reducing branches, then use emf, internal resistance and current consistently.
Analyse potential dividers and instrument loading to predict voltage and current readings.
Compare circuit power when lamps or resistors move between series and parallel arrangements.

[Maximum number: 3]

A girl rides a bicycle that is powered by an electric motor. A battery transfers energy to the electric motor. The emf of the battery is 16 V and it can deliver a charge of 43 kC when discharging completely from a full charge.

(a)

The battery is made from an arrangement of 10 identical cells as shown.

Calculate

[ 3 ]

(i)

the emf of one cell.

[ 1 ]

$\frac{16}{5}=3.2$ « V »

(ii)

the internal resistance of one cell.

[ 2 ]

ALTERNATIVE 1:

2.5 r=0.62

r=0.25 «Ω»

ALTERNATIVE 2:

$\frac{0.62}{5}=0.124$ « $\Omega$ »

r=2(0.124)=0.248 « $\Omega$ »

Marking guidance:

Allow ECF from (d).

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B.5.13—Series and parallel circuits question 1

Question (a)

Question (i)

Question (ii)