Homework problem 20 Page 1 of l
Homework problem 20
20. The total current delivered to a number
of devices connected in parallel is the sum
of the individual currents in each device.
Circuit breakers are resettable automatic
switches that protect agains
Homework problem 30
30. The circuits shown in Figure 30 are energized by DC voltages as shown.
Find the voltage, V0, at node n for each circuit.
1 2Vdc 10Vdc
20.0 9. 209 Q 10Vdc V0
V 20.09 n
n V0 n o n V0
20.0 9 50.0 9 9.0 Q 8.09 20.0 (2
Homework problem 35
35. At a certain location, the horizontal component of the earth's magnetic field is 2.5x10'5 T, due
north. A proton moves eastward with just the right speed, so the magnetic force on it balances its
Jight. A proton's mass is 1.67x10