Answer to Question #76666 in Electricity and Magnetism for lainee

Electricity and Magnetism

Question #76666

the potential different across the lamp is 4.2v the current in the lamp is then 0.19 a calculate the resistance of the lamp

Expert's answer

Ohm's law - I=V/R→R=V/I , calculate the resistance of the lamp - R=(4.2V)/(0.19A)=22.1 Ohm

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