Question

Q-5. From the diagram, determine
1) The equivalent resistance of the entire circuit
11) The current through each resistor
111) The total current from the power supply
iv) The voltage drop across each resistor
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Answer 1

Explanation:

• R1 = 20 ohm
• R2 = 15 ohm
• R3 = 20 ohm
• R4 = 15 ohm
• R5 = 8 ohm

1). R2 & R4 are in series, So

R¹ = R2 + R4

= 15 + 15 = 30 ohm

Now this R¹ & R3 are in parallel

1/R² = 1/R¹ + 1/R3

= 1/30 + 1/20

= 5/60

R² = 60/5 = 12 ohm

Now this R², R1 &R5 are in series

Req = R² + R1 + R5

= 12 + 20 + 8

= 40 ohm

3). Total Current in Circuit

I = V / Req

= 12 / 40

= 0.3 A