CAIE IGCSE Physics 4.2.2.1 Electric Current Is Related to the Questions

Connect electric current with moving charge in CAIE IGCSE Physics by describing charge flow in a wire and explaining how a charged object can discharge through Earth.

Exam points

Recognise electric current as a flow of electric charge, rather than simply the presence of charge on an object.
Explain current in a wire between a positively charged sphere and Earth through electron attraction or a potential difference that causes charge to move.

[Maximum number: 1]

A circuit contains two fixed resistors and a light-dependent resistor (LDR). Fig. 8.1 shows that the power supply is a 9.0 V battery.

Fig. 8.1

The current in the $450 \Omega$ resistor is 0.012 A .

State what is meant by electric current.

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CAIE IGCSE Physics 4.2.2.1 Electric Current Is Related to the Questions question 1