Question

A 7.7 resistor and a 4.9 resistor are connected in series with a battery. The current across the 7.7 resistor is measured as 0.25 A. Find the potential difference across the battery.

Answer 1

Step-by-step explanation:

In a series circuit such as this, the current is the same through all of the components

Current THROUGH 7.7 ohm resistor is .25 A

V = IR = 7.7 * .25 = 1.925 V

Current THROUGH 4.9 Ω resistor is also .25 A

V = IR = 4.9 * .25 = 1.225 V

Summed = battery V 1.925 + 1.225 = 3.15 V

( P.S. VOLTAGE is measured ACROSS a component and CURRENT is measured THROUGH a component)