Practise

Question bank

Original exam-style questions, mapped to your syllabus. Answers are checked for mathematical equivalence and every attempt updates your mastery.

12 questions

SA-5054-EL3-0012 marksL1 FoundationCalculatorR = V/I

A p.d. of

12

V produces a current of

3.0

A in a resistor. Calculate its resistance.

Salam Academy Original Practice · Proposed mark scheme

SA-5054-EL3-0022 marksL1 FoundationCalculatorR = V/I

A current of

0.50

A flows through a

20

Ω resistor. Calculate the p.d. across it.

Salam Academy Original Practice · Proposed mark scheme

SA-5054-EL3-0041 markL1 FoundationCalculatorI–V graphs

A straight line through the origin on an

I

–

V

graph shows a component that

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SA-5054-EL3-0061 markL1 FoundationCalculatorI–V graphs

A diode

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SA-5054-EL3-0071 markL1 FoundationCalculatorI–V graphs

The length of a wire is doubled; its cross-sectional area is unchanged. By what factor does its resistance change?

Salam Academy Original Practice · Proposed mark scheme

SA-5054-EL3-0081 markL1 FoundationCalculatorI–V graphs

The cross-sectional area of a wire is doubled; its length is unchanged. By what factor does its resistance change?

Salam Academy Original Practice · Proposed mark scheme

SA-5054-EL3-0092 marksL1 FoundationCalculatorR = V/I

A point on a resistor's

I

–

V

graph shows a current of

0.30

A at

6.0

V. Calculate the resistance.

Salam Academy Original Practice · Proposed mark scheme

SA-5054-EL3-0101 markL1 FoundationCalculatorI–V graphs

As the temperature of a thermistor increases, its resistance

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SA-5054-EL3-0121 markL1 FoundationCalculatorR = V/I

One ohm is equal to

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SA-5054-EL3-0032 marksL2 StandardCalculatorR = V/I

A p.d. of

9.0

V is applied across a

450

Ω resistor. Calculate the current in mA.

Salam Academy Original Practice · Proposed mark scheme

SA-5054-EL3-0051 markL2 StandardCalculatorI–V graphs

The

I

–

V

graph of a filament lamp curves because

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SA-5054-EL3-0113 marksL3 ExamCalculatorI–V graphs

A wire

2.0

m long has a resistance of

4.0

Ω. Calculate the resistance of a wire of the same material that is

3.0

m long and has twice the diameter.

Salam Academy Original Practice · Proposed mark scheme