Q.1:
The power dissipation in each of four parallel branches is 1.2 W. The total power dissipation is________________?q
A.
1.2 W
B.4.8 W
C.
0.3 W
D.
12 W
Q.2:
If there are a total of 120 mA into a parallel circuit consisting of three branches, and two of the branch currents are 40 mA and 10 mA, the third branch current is_________________?
A.
50 mA
B.70 mA
C.
120 mA
D.
40 mA
Q.3:
The currents into a junction flow along two paths. One current is 4 A and the other is 3 A. The total current out of the junction is_____________?
A.
1 A
B.7 A
C.
unknown
D.
the larger of the two
Q.4:
Four resistors of equal value are connected in parallel. If the total voltage is 15 V and the total resistance is 600 , the current through each parallel resistor is____________?
A.
25 mA
B.
100 mA
C.6.25 mA
D.
200 mA
Q.5:
When an additional resistor is connected across an existing parallel circuit, the total resistance____________?o
A.
remains the same
B.
decreases by the value of the added resistor,
C.
increases by the value of the added resistor,
D.decreases
Q.6:
Three lights are connected in parallel across a 120 volt source. If one light burns out_____________?e
A.
the remaining two will glow dimmer"
B.
the remaining two will glow brighter$
C.
the remaining two will not light
D.the remaining two will glow with the same brightness as before>
Q.7:
Five light bulbs are connected in parallel across 110 V. Each bulb is rated at 200 W. The current through each bulb is approximately___________?
A.
2.2 A
B.
137 mA
C.1.8 A
D.
9.09 A
Q.8:
In a five-branch parallel circuit, there are 12 mA of current in each branch. If one of the branches opens, the current in each of the other four branches is_______________?
A.
48 mA
B.12 mA
C.
0 A
D.
3 mA
Q.9:
Three 47 resistors are connected in parallel across a 110 volt source. The current drawn from the source is approximately_______________?
A.
2.3 A
B.
780 mA
C.
47 mA
D.7.06 A
Q.10:
A sudden increase in the total current into a parallel circuit may indicate______________?Z
A.
a drop in source voltage
B.
an open resistor
C.an increase in source voltage
D.
either a drop in source voltage or an open resistor3