HARD
Upper Secondary: IGCSE
IMPORTANT
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Draw a circuit diagram to show how a voltmeter and an ammeter are used to measure the resistance of a lamp.

Important Questions on Electrical Quantities

MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 18 - Electrical Quantities>End-of-chapter questions>Q 3
Write the equation relating voltage, current and resistance that you would use to calculate the resistance of the lamp.
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 18 - Electrical Quantities>End-of-chapter questions>Q 4

Copy and complete the table to show the units and their symbols for each of the quantities shown.

  Unit Symbol for unit
Potential difference    
Current    
Resistance    
HARD
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 18 - Electrical Quantities>End-of-chapter questions>Q 6

Copy and complete the table below (leave plenty of space!). The first column shows a symbol equation relating quantities. In the second column, write the same equation in words to show the names of the quantities. In the third column, write the same equation in units.

Equation In words In units
Q=It    
R=VI    
P=IV    
E=IVt    
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 18 - Electrical Quantities>End-of-chapter questions>Q 7
Draw a circuit to show how a cell can be connected to a switch and a lamp, so that the lamp lights up when the switch is closed. Label the components in your circuit.
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 18 - Electrical Quantities>End-of-chapter questions>Q 7
Draw a circuit to show how a cell can be connected to a switch and a lamp, so that the lamp lights up when the switch is closed. Label the components in your circuit. Add arrows to your circuit to show the direction in which electric current flows in the circuit.
EASY
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 18 - Electrical Quantities>End-of-chapter questions>Q 8

To determine the resistance R of a resistor, an ammeter and a voltmeter can be used. What quantity does the voltmeter measure?

MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 18 - Electrical Quantities>End-of-chapter questions>Q 8

To determine the resistance R of a resistor, an ammeter and a voltmeter can be used. If voltmeter gave a reading of 6.5 V and the ammeter gave a reading of 1.25 A, what would be the value of R?

MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 18 - Electrical Quantities>End-of-chapter questions>Q 9

Electrical appliances are used to transform electrical energy into other, more useful, forms of energy. Into what useful form of energy does a filament lamp transform electrical energy?