Lamp Cord Wires . The wires in a household lamp cord are typically 3.0 mm apart center to center and carry equal currents in opposite directions. If the cord carries direct current to a 100-W light bulb connected across a 120-V potential difference, what force per meter does each wire of the cord exert on the other? Is the force attractive or repulsive? Is this force large enough so it should be considered in the design of the lamp cord? (Model the lamp cord as a very long straight wire.)
Lamp Cord Wires . The wires in a household lamp cord are typically 3.0 mm apart center to center and carry equal currents in opposite directions. If the cord carries direct current to a 100-W light bulb connected across a 120-V potential difference, what force per meter does each wire of the cord exert on the other? Is the force attractive or repulsive? Is this force large enough so it should be considered in the design of the lamp cord? (Model the lamp cord as a very long straight wire.)
Lamp Cord Wires. The wires in a household lamp cord are typically 3.0 mm apart center to center and carry equal currents in opposite directions. If the cord carries direct current to a 100-W light bulb connected across a 120-V potential difference, what force per meter does each wire of the cord exert on the other? Is the force attractive or repulsive? Is this force large enough so it should be considered in the design of the lamp cord? (Model the lamp cord as a very long straight wire.)
Two long wires are placed parallel to each other. Wire 1 is very long and wire 2 has length 10 cm. The wires are separated by a distance of 2 mm. Wire 1
carries a current of 100 mA and wire 2 carries a current of 250 mA. The currents are flowing in the same direction. Calculate the magnitude of the force
that wire 1 exerts on wire 2, and determine whether this force is attractive or repulsive. 40 = 4 x 10-7T-m/A
Select one:
O 2.5 × 10-N
O
3.5 × 10-N
O 4.5 x 10 7 N
O
1.5 x 10-7 N
Two infinitely long parallel
wires are at a distance of 5.0
cm apart. If the wires carry a
current of 1.2A, what is the
exchanged force per meter
between the wires ( in units
of μN )?
Select one:
A. 6.8
B. 5.8
C. 3.3
D. 4.6
E. 7.5
In a lab experiment, two parallel wires are separated by a distance of 4.5 mm. One wire carries a current of 270A while the other carries a current of 350A. The currents are in the same direction
What is the magnitude of the force per unit length (in N/m) that one wire exerts on the other?
A) 0.0156
B) 0.0042
c) 0.012
D) 4.2
E) 0
Is the magnetic force between the wires attractive, repulsive, or neither?
Chapter 28 Solutions
University Physics with Modern Physics (14th Edition)
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