The current in the coil of the electric lamp is 0.7 A, the resistance of the lamp is 310 Ohm. determine the voltage at which the lamp is located.
I = 0.7 A.
R = 310 ohms.
According to Ohm’s law for a section of a circuit, the current I is directly proportional to the voltage U at the ends of the conductors and inversely proportional to the resistance of the conductor R.
I = U / R.
Let’s express the voltage: U = I * R.
U = 0.7 A * 310 Ohm = 217 V.
Answer: the lamp is under voltage U = 217 V.
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