With reference to v and i defined in Figure 1-2, which of the following statemen

Question

With reference to v and i defined in Figure 1-2, which of the following statements is false?

If the absorbed power is 100 W and i=2A, the value of v is 50V.

If v=-5 V and i=-2mA, the value of R is 2.5 k?.

If v=-6 V and R=2 ?, the supplied power is 18 W.

If the supplied power is -20W and v=10 V, the value of i=2 A.

1 points

If the absorbed power is 100 W and i=2A, the value of v is 50V.

If v=-5 V and i=-2mA, the value of R is 2.5 k?.

If v=-6 V and R=2 ?, the supplied power is 18 W.

If the supplied power is -20W and v=10 V, the value of i=2 A.

Explanation / Answer

A) P = IV

so V = P/I = 100/2 = 50 V so True

B) V = I R

R = V/I = 5/2.0E-3 = 2.5E3 so True

C) P = V^2/R = 36/2 = 1 W so true

D) P = I V

I = P/V = -20/10 = - 2 A

wrong sign so D)

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