Question

A resistor of 4 ohms is connected isn series to a box speaker of unknown resistance. If a current of 0. 6A flows through the speaker when a voltage of 12V is applied across the combination, calculate: 1. The total resistance in the circuit. Ii. The resistance of the speaker ili. The voltage applied across the speaker. ​

Answer 1

Step-by-step explanation:

Part One

Current = 0.6 amps

Voltage = 12 volts

R = ?

R = E / I

R = 12/0.6

R = 20 ohms

Part 2

Rt = Rspeaker + R

Rt = 20 ohms

R = 4 ohms

Formula

Rt = Rspeaker + R

20 = Rspeaker + 4 Subtract 4 from both sides

Rspeaker = 16 ohms

Part 3

Rspeaker = 16 ohms

I = 0.6 ohms

E = 0.6 * 16

E = 9.6