When a 40 V battery is connected across an unknown resistor, there is a current of 100 mA in the circuit. The value of the resistance is
A. 5000 Ω
B. 800 Ω
C. 0.8 Ω
D. 400 Ω
Answer:D
When a 40 V battery is connected across an unknown resistor, there is a current of 100 mA in the circuit. The value of the resistance is
A. 5000 Ω B. 800 Ω C. 0.8 Ω D. 400 Ω