When connecting series-connected resistances 15, 20 and 25 Ohm to the current source, a current of 2A appears

univerkov | December 11, 2020 | education

When connecting series-connected resistances 15, 20 and 25 Ohm to the current source, a current of 2A appears in the circuit. Determine the voltages at each of the resistances.

Given:
R1 = 15 Ohm
R2 = 20 Ohm
R3 = 25 Ohm
I = 2A
Find: U1, U2, U3
Decision:
according to Ohm’s law for a circuit section: I = U / R
U = IR
U1 = 2A * 15 Ohm = 30V
U2 = 2A * 20 Ohm = 40V
U3 = 2A * 25 Ohm = 50V
Answer: U1 = 30V, U2 = 40V, U3 = 50V

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