Answer
a) 50 W and energy is delivered to the element.
b) 50 W and energy is delivered to the element.
c) 50 W and energy is absorbed by element.
Work Step by Step
For the given arrangement device is not following passive reference configuration (as current is entering the positive reference side).So, power = -vi.
a. power = -(2 A)(-25 V) = 50 W, positive means that element is absorbing energy.
b. power = -(-2 A)(25 V) = 50 W, positive means that element is absorbing energy.
c. power = -(-2 A)(- 25 V) = -50 W, negative means that element is supplying energy.
