1. Of the following the copper conductor that has the least resistance is: Answe
ID: 1303560 • Letter: 1
Question
1.
Of the following the copper conductor that has the least resistance is:
Answer
thick, short and cool
thin, long and hot
thick, long and hot
thin, short and hot
thin, short and cool
2.
Two wires made of the same material have the same length but different diameters. They are connected in series to a battery. The quantity that is the same for the wires is:
Answer
the electric field
the electron drift velocity
the current density
the end-to-end potential difference
the current
3.
A 120-V power line is protected by a 15-A fuse. What is the maximum number of "120 V, 500 W" light bulbs that can be operated at full brightness from this line?
Answer
2
4
1
3
5
4.
We want to determine the current i, and its direction in the circuit diagram shown below, by the using the Kirchhoff's loop law. Which of the following is the correct equation for the algebraic sum of the voltages around the loop?
Answer
(6.0V) - (18?)(i2) - (3.0V) = 0
- (6.0V) - (18?)(i) - (3.0V) = 0
(6.0V) - (18?)(i) - (3.0V) = 0
(6.0V) + (18?)(i) + (3.0V) = 0
- (6.0V) - (18?)(i2) + (3.0V) = 0
5.
Two parallel wires, 4 cm apart, carry currents of 2 A and 4 A respectively, in opposite directions. The force per unit length in N/m of one wire on the other is:
Answer
1
a.thick, short and cool
b.thin, long and hot
c.thick, long and hot
d.thin, short and hot
e.thin, short and cool
Explanation / Answer
1. a
2. e
3. d
4.
5. b
6.c
7. b
8.
9.b
10.a
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