1. Which of the following is NOT a legitimate expression for determining the rat

Question

1. Which of the following is NOT a legitimate expression for determining the rate at which energy is passed in an electric current?

a) P = V^2/R b) P = VI c) P = I^2R d) P=V^2I

2. When three resistors, R1, R2, and R3, are in series, how is the overall resistance determined?
A) Rtotal = (R1 + R2 + R3)/3

B) Rtotal = (R1R2R3)((R1 + R2 + R3)

C) Rtotal = (R1 + R2 + R3)/(R1R2R3)

D) Rtotal = R1 + R2 + R3

3. When 3 resistors, R1, R2, and R3, are in parallel, how do you determine the total resistance of the combination?

A) Rtotal = R1 + R2 + R3

B) 1/Rtotal = 1/(R1 + R2 + R3)

C) 1/Rtotal = 1/R1 + 1/R2 + 1/R3

D) 1/Rtotal = 3/(R1 + R2 + R3)

Explanation / Answer

1. D) not correct test are correct since Power P= I2R and als By ohms law V=IR yu can rule out the options.

2. A) B) & C) are not correct since when resistances are in series they are added directly.

3 A} B) and D) are not correct because when the resistances are in parallel we. An. Calculated the equivalent resistances by 1/R = 1/R1 + 1/R2 + 1/R3 +.…...1/Rn.

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