Please explain to me this question and give me the answer. Hamt Class Management

Question

Please explain to me this question and give me the answer.

Hamt Class Management Help C Circuits Begin Date: 2/26/2018 11:01:00 AM Due Date: 3/5/2018 11:59:00 PM End Date: 3/5/2018 11:59:00 PM (8%) Problem 3: You take two electric bulbs Bulb #1 is marked 20w and bulb #2 is 50W They are designed to be used with usual household voltage. Ifyou connect these bulbs in series to an outlet, which of the following is true? Bulb #1 produces greater illumination. Both bulbs produce the same illumination. Grade S Deductio Potential It is imposs sible to answer without knowing what is the voltage of battery. Submiss Attempts (0% per detailed Bulb #2 produces greater illumination. Submit Hint I give up! Hints: 40 deduction per hint. Hints remaining:2 Feedback:-deduction per feedback

Explanation / Answer

as we power,

P= V^2/R

for constant voltage, P is inversely proportional to R

so R20> R50 ...(i)

as the connection is in series, P=i^2*R

for current to be constant, P is directly proportaion to R

from ...(i) , P20>P50

hence bulb #1 is more luminous than bulb #2.

option (a) is correct.

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