CAIE IGCSE Physics 4.2.1.7 Charge Is Measured in Coulombs Questions

Practise identifying the coulomb as the SI unit of electric charge and distinguishing it from the units used for current, voltage, resistance and power.

Exam points

State that electric charge is measured in coulombs, symbol C, distinguish charge in coulombs from current in amperes and potential difference in volts, and identify the physical quantity represented by a coulomb in exam questions.

[Maximum number: 1]

A plastic rod is rubbed with a cloth and becomes positively charged. After charging, the rod is held close to the suspended table-tennis ball shown in Fig. 9.1. The table-tennis ball is covered with metal paint and is uncharged.

Fig. 9.1

State the unit in which electric charge is measured.

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CAIE IGCSE Physics 4.2.1.7 Charge Is Measured in Coulombs Questions question 1