Question

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When a 4V battery is connected across an unknown resistor there is a current of 100 mA
in the circuit. The value of the resistance of the resister is:
i) 4 ohm
ii) 40 ohm
iii) 400 ohm
iv) 0.4 ohm
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Answer 1

Answer:

R=v/I

R=4/0.1

R=40 ohm

1A=1000mA