ConceptConceptDocsDocuments

CAIE IGCSE Physics: Circuit Current & Voltage Rules Question Bank

Practise using circuit rules to find ammeter and voltmeter readings in series, parallel and mixed resistor circuits with junctions.

Syllabus
2026–2028
Course
Physics 0625

Exam points

  • use junction rules to compare ammeter readings in parallel branches
  • calculate p.d. across series resistors from the supply voltage ratio
  • explain zero current when a diode orientation blocks a circuit branch

4.3.2.8—Circuit rules: (a) current into a question 1

[Maximum number: 2]

Fig. 7.1 shows three identical lamps and an ammeter connected to a power supply.

Fig. 7.1

Fig. 7.1

The switches are closed. Each lamp is rated at 60 W and operates at its normal working voltage of 110 V .

Question (a)

(a)

Calculate:

[ 2 ]

Question (i)

(i)

the current in the ammeter
current =

[ 1 ]

Question (ii)

(ii)

the voltage of the power supply.
voltage =

[ 1 ]
All question bank results loaded