1. How much current flows through a lamp with a resistance of 45 ohms when the voltage across the lamp is 20-V?
2. How much current is in a circuit that includes a 15-volt battery and a bulb with a resistance of 3 ohms?
3. What is the voltage of a circuit with 15 amps of current and toaster with 8 ohms of resistance?
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Answer:
1. 0.2 Amp
V = IR
V = Voltage (V)
I = Current (Amp)
R = Resistance (Ohm)
12 Vol = I × 60 Ohms
12/60 = 0.2 Amp