Question

(100 Points) Three resistors of 100, 40.0, and 10.0 Ohms are in series with a 24.0 V power supply. What is the voltage drop across the 40.0 Ohm resistor?
(Unit= V)

Answer 1

Answer:

  6.4 V

Explanation:

You have a series circuit of three resistors and a 24 V power supply. You want to know the voltage across the 40 Ω resistor, when the other two resistors are 100 Ω and 10 Ω.

Voltage drop

The fraction of total voltage in a series circuit that is dropped across any resistor is the ratio of that resistor value to the total resistance in the circuit. The voltage drop across a 40 Ω resistor in a circuit with a total resistance of 150 Ω is ...

  (24 V)(40/150) = 32/5 V = 6.4 V