Combining Resistors in Series & Parallel Video Lessons

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Problem: When a bulb is added in parallel to a circuit with a single bulb, the resistance of the circuit: A. remains the same B. decreases C. increases D. triples E. doubles

FREE Expert Solution

Equivalent resistance for resistors in parallel:

1Req=1R1+1R2+...+1Rn

or for 2 resistors:

Req=R1R2R1+R2

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Problem Details

When a bulb is added in parallel to a circuit with a single bulb, the resistance of the circuit: 

A. remains the same 

B. decreases 

C. increases 

D. triples 

E. doubles

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