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Using the data on the diagram above, calculate the potent...

Using the data on the diagram above, calculate the potential difference across the 20- Ω resistor. (Neglect the internal resistance of the cell)

Using the data on the diagram above, calculate the potential difference across the 20- Ω resistor. (Neglect the internal resistance of the cell)

A.

5V

B.

10V

C.

20V

D.

60V

Correct answer is D

Voltage across 5Ω resistor = IR = 2 × 5 = 10V
Since voltage in a parallel connection is the same, voltage across 10Ω is also 10V
Current flowing across the 10Ω resistor

I = V/R = 10/10

Current I= 1A


Total current flowing = 2 + 1 = 3A


Voltage across 20Ω resistor = IR

= 3 × 20

= 60V