The current in the coil of the electric lamp is 0.7 A, the resistance of the lamp is 310 Ohm.

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.

U -?

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.