1. A 200 A current flowing along a wire creates a tubular magnetic force
field around the wire.
What is the magnetic flux density at a spot in the
magnetic field 6 000 m from the wire?
2. A magnetic induction of 4.5 * 10-5 Tesla would occur
at a spot in a magnetic force field how
far from a wire carrying a 35 A current?
3. What current would need to flow along a wire to produce a magnetic
induction of
2.7 * 10-4 Tesla at a spot in the
magnetic field 4 000 m away from the wire?
4. A 400 A current flowing along a wire creates a tubular magnetic
force field around the wire.
What is the magnetic flux density at a spot in the
magnetic field 1 000 m from the wire?
5. A magnetic induction of 1.8 * 10-5 Tesla would occur
at a spot in a magnetic force field how
far from a wire carrying a 55 A current?
6. Find the magnetic flux density at the center of a 3 m diameter hoop
carrying a 6.1 A current.
7. What is the current flowing through a 1.3 m diameter hoop if the
magnetic flux at its center is
3.5 * 10-2 Wb/m2?
8. A hoop of what diameter would create a magnetic flux of 6.2 * 10-3
Tesla at its center when
carrying a 5.2 A current?
9. What is the current flowing through a 2.6 m diameter hoop if the
magnetic flux at its center is
4.2 * 10-2 Wb/m2?
10. Find the magnetic flux density at the center of a 4 m diameter
hoop carrying a 7.3 A current.
11. A 400 m long wire carries a 60 A current. If a magnetic field has
a magnetic flux of 8.8 * 10-1
Tesla, with what force will it push
against the wire?
12. A magnetic force field with an induction of 3.7 * 10-4
Wb/m2 pushes with 5.3 N on a wire
carrying a 19 A current crosses. Find
the length of the wire.
13. A magnetic force field pushes with 5.8 N against a 0.6 m long wire
carrying 15 A of current.
What is the magnetic flux density at that
point in the field?
14. A magnetic field with an induction of 7.3 * 10-3 Tesla
pushes with 2.9 N on a 3.2 m long wire.
What current is in the wire?
15. A magnetic force field with an induction of 6.1 * 10-4
Wb/m2 pushes with 8.8 N on a wire
carrying a 0.9 A current crosses. Find
the length of the wire.
16. Two 0.5 m long wires 0.1 m apart from each other and carrying 3.3
A of current will exert
what force on each other?
17. Two 1.2 m long wires 0.8 m apart from each other push at each other
with 4.2 N. If one wire
carries 2.6 A of current, what current
is flowing through the other wire?
18. What distance separates a pair of 0.7 m long wires, one carrying
0.3 A of current, the other
0.5 A, that push at each other with
0.2 N?
19. Two wires, one carrying 3.1 A of current, the other 4.6 A, push
at each other with 8 N. If
they are 0.7 m apart, what is their
length?
20. Two 0.7 m long wires 0.2 m apart from each other and each carrying
2.9 A of current will exert
what force on each other?