THE PROBLEM Suppose you have an endless supply of light bulbs, and all of them o

Question

THE PROBLEM Suppose you have an endless supply of light bulbs, and all of them operate at P-60 W. You want to connect them in parallel and power them from a standard -120 volt wall outlet. The circuit breaker will open the circuit if the current exceeds I-25 A. Calculate the maximum number of light bulbs you can use in parallel. PAPER SOLUTION INTERPRET Identify all of the true statements A. The current is the same for each light bulb in your parallel circuit. B. The resistance is the same for each light bulb in your parallel circuit. C. The power is the same for each light bulb D. The potential difference is the same for each light bulb in your parallel in your parallel circuit circuit. E. None of the above. DEVELOP Derive an algebraic expression for the maximum number In your answer type E to represent e.

Explanation / Answer

Ans:-

Given data : P= 60w, = 120v, I = 25A

Current draw by 1 bulb

P = I*V

60 = I *120

I = 0.5A

N*I= 25A

N = 25/0.5 =50 bulb use in parallel line

The potential difference is the same for each light bulb in your parallel circuit

P = I* = I*E

I = P/E

N*I = N*P/E= 25

N = 25E/P

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