Assignment:
Question 1. Find the Laplace transform of e^(-3t) cos 4t.
Question 2. Find the inverse Laplace Transform of s/(s^2 - 1).
Question 3. The transfer function for a circuit is H(s) = (s-1)/((s-1)^2 + 4). What is the natural response of the system? Is it stable?
Question 4. The natural response of a circuit is given by h= cosh t. What is the transfer function?
Question 5. If a current i=40cos(100t+20°)is fed through a 1/10 F capacitor, what voltage is across it?
Question 6. A current i=40cos(100t+20°)is fed through a 1/10 F capacitor. What is the instantaneous power?
Question 7. A current i=40cos(100t+20°)is fed through a 1/10 F capacitor. What is the average power?
Question 8. A 21 V source is in series with a 3 ohm and a 4 ohm resistor. What is the total power absorbed by the 4 ohm resistor?
Question 9. If a capacitor rated at 1/5 F is in series with a 5 ohm resistor, compute the time constant.
Question 10. At time t = 0 , the current flowing through an inductor is i0 . A switch is closed and the inductor is in series with a resistor R . What current flows through the inductor from that time on if there are no sources?
Question 11. At time t = 0 , the voltage across a capacitor is v0 . A switch is closed and the capacitor is in series with a resistor R . What voltage is across the capacitor from that time on if there are no sources?
Question 12. At time t = 0 , the voltage across a capacitor rated at 3/10 F is 10 V. A switch is closed and the capacitor is in series with a resistor R = 50 ohms. How long does it take for the voltage to decay to 4 volts?