DiagramModerate1 mark
3(d)
A music system draws a current of 400 mA when connected to a 12 V battery.
The music system is left playing for several hours and finally the battery voltage drops and the music system stops playing when the current drops to 320 mA. At what battery voltage does the music system stop playing?
Topic: Current, resistance and circuits
Previous-year question practice database
Answer
Exam answer
9.6 V.
Explanation
V = IR = 0.32×30 = 9.6 V.
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