Homework 5
Magnetic Force
For the actuator shown above: N = 500
A = (20 mm)2 = 4.010-4 m2
i = 3.0 A
Calculate the flux density B(x) [T], the flux (x) [Wb], the coil inductance L(x) [H], and the
electr
Homework 4 Wheatstone bridge - Spring 2011
VT
10 k
Rx
10 V
VL
Vo
VR
10 k
1 k
0
The voltmeter (shown by a circle in the diagram) is almost an open circuit, so
you may neglect its current.
(a) Develop a
Homework 3 - Spring 2011.
A two-wire dc power distribution circuit supplies six 100 W lamps located 250 ft from a
dc generator. The generator voltage is 120 V and the lamp voltage should be 110 V or
m
ELCT 220
Spring 2011
Homework 2
(a) Two resistors are connected in series R1 = 12 k and R2 = 9.1 k. Sketch a circuit showing the series
connection of these two resistors with a battery. Calculate the
ELCT 220
Spring 2011
Homework 1
1. Two resistors R1 = 5.6 k and R2 = 3.3 k are to be connected in series. Calculate the series
equivalent resistance Rs.
2. The same two resistors are reconnected in pa
Extra credit problems spring 2011
1.5
12 V
1.0
15
1.2
22
1.1
33
12 V
1. Set up mesh current equations. Sketch the circuit showing the mesh current directions.
2. Set up node voltage equations.