Deck 1: Voltage, Current, Power, and Sources

Question 1

the power in the circuit element shown below and state whether the element is
absorbing power or releasing power.

Answer 1

p = - 0.27 W = - 270 mW

Question 2

the equation of the sinusoid shown below.

Answer 2

Question 3

the power instantaneous p(t) on the element when the current i(t) through the element
from positive terminal to negative terminal and voltage v(t) across the element are given by

Answer 3

Question 4

Plot

Question 5

Plot
f(t)=4 σ (t+6)- 5 σ (t-4)

Question 6

Plot
f(t) = -2u(t) + 6 u(t-2) - 9 u(t-5) + 5 u(t-8)

Question 7

charge entering an element is shown below. Plot the current through the element for 0 ≤ t
< 10s.

Question 8

Plot

Question 9

Plot
f(t)=2tu(t)-6(t-2)u(t-2)+8(t-4) u(t-4)-12(t-7)u(t-7)+8(t-8) u(t-8)

Question 10

Plot
v(t) = 3 + 8 cos(2π2000t + 135°) V