1. The power contained in a sinusoidal current signal with an amplitude of 6 and a frequency of 6 Hz flowing through a resistance of 1 ohm is:
A. 36 watts
b. 18 volts squared seconds
c. 36 ampere squared seconds
d. 18 watts
2. Given v1= 20sin(wt+60) and v2= 60 cos(wt-10), determine the phase angle between the two sinusoids and which one lags the other.
a. 60 and v1 lags v2
b. 20 and v1 lags v2
c. 20 and v1 leads v2
d. 60 and v1 leads v2
3. which statement does not describe a sequential circuit?
a. a circuit composed of a combinational circuit with added memory.
b. the output values depend only on the present value of the inputs and not on past values.
c. a circuit that is said to have memory
d. none of the above
4. if x[n] = uu[n+4] -4u[n] +3u[n-3], then x[2] is
a. 0
b. -1
c.-2
d.-3
5. Determine the total charge flowing into a element for 0< t< 2s when the current entering its positive terminal is i(t) = exp (-2t) mA.
a. 490 uf
b. 500 uf
c. 450 uf
d. None of the above
6. The Taylor series are used to estimat f(x) = e^-12x , at xi +1, for f(1) =0.312 , and f(0.25) = 0.7408
a. 0%
b. 70.21
c. 145.95%
d. 10.11%
7. One root of the equation 3X^2 -X - 2 = 0 is
a. -1
b. -0.667
c. 0.937
d. 0.826
8. The real root of f(x) = 2(e^x - 2x^3)
a. [0 0.5]
b. [1.2 1.6]
c. [1.7 4]
d. [0.8 1.4]