1)Why is there phase difference between voltage and current in
an a.c. circuit ?. Explain the concept of power factor.
2). Discuss the disadvantages of a low power factor.
3. Explain the causes of low power factor of the supply
system.
4. Discuss the various methods for power factor improvement
5)Write short notes on the following : (i) Power factor
improvement by synchronous condenser (ii) Importance of p.f.
improvement (iii) Economics of p.f. improvement
Examples and describe voltage, current, and phase angle.
Describe power and resonance in ac circuits.
Examples in daily life and explain how transformers work.
PLEASE DO NOT WRITE IT BY HAND
l. what is the difference between a real independent voltage
source and an ideal independent voltage source? Give an example of
a real voltage source and explain how it differs from the
ideal.
2. What does it mean when we say that a circuit containing
multiple sources is invalid?Give an example of such a circuit and
explain why it is invalid.
3. What is resistance? What is a node? What is a closed
loop?
4. Write the equations for Ohm's...
The current in an inductor
Select one:
a. is in phase with the voltage
b. lags behind the voltage by 90 degrees
c. leads the voltage by 90 degrees
The current in an resistor
Select one:
a. leads the voltage by 90 degrees
b. lags behind the voltage by 90 degrees
c. is in phase with the voltage
What is an AC circuit?
Select one:
a. A circuit in which the applied voltage is constant as a
function of time...
What is the difference between a stabilizing force and
dislocating force? At what angle of pull does the stabilizing force
become a dislocating force? Why? For full credit, draw the free
body diagrams and equations of force or moment to support your
answer.