two resistors with resistances R1 R2, are connected in parallel to a V source Ho

Question

two resistors with resistances R1 R2, are connected in parallel to a V source Homework- Chapter 21 Begin Date: 12/27/2017 12:00:00 AM-Due Date: 3/28/2018 11:59:00 PM End Date: 4/3 (1296) Problem 4: Two resistors, with resistances R,-1.5 and R2-3.6 , are connected in parallel to a V-6.5 V source. 33% Part (a) Enter an expression for the current, I, in the circuit in terms of the given quantities. Potential Submissions Attempts rema (1% per atten detailed view Submit Hint I give up Hints: 1% deduction per hint Hints remaining 2 Feedback: 01 deduction per feedback 33% Part (b) what is the value of the current, I, in amperes? 33% Part (c) How much power, P, in watts, is dissipated in the circuit?

Explanation / Answer

Remember:
for parallel combination
1/Req = 1/R1 + 1/R2 + 1/R3 + ............
for 2 resistors in parallel it will be
Req = R1*R2/(R1+R2)
Using Ohm's law:

V = i*Req

i = V/Req

i = V*(R1 + R2)/(R1*R2)

Part B

i = 6.5*(1.5 + 3.6)/(1.5*3.6)

i = 6.14 Amp

Part C

P = V*i

P = 6.5*6.14

P = 39.91 W

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