Questions from College Physics

Q: In 1962 measurements of the magnetic field of a large tornado were

In 1962 measurements of the magnetic field of a large tornado were made at the Geophysical Observatory in Tulsa, Oklahoma. If the magnitude of the tornado’s field was B = 1.50 x 10-8 T pointing north...

Q: A cardiac pacemaker can be affected by a static magnetic field as

A cardiac pacemaker can be affected by a static magnetic field as small as 1.7 mT. How close can a pacemaker wearer come to a long, straight wire carrying 20 A?

Q: The two wires shown in Figure P19.48 are separated by

The two wires shown in Figure P19.48 are separated by d = 10.0 cm and carry currents of I = 5.00 A in opposite directions. Find the magnitude and direction of the net magnetic field (a) At a point mid...

Q: Four long, parallel conductors carry equal currents of I = 5

Four long, parallel conductors carry equal currents of I = 5.00 A. Figure P19.49 is an end view of the conductors. The direction of the current is into the page at points A and B (indicated by the cro...

Q: Two long, parallel wires carry currents of I1 = 3.

Two long, parallel wires carry currents of I1 = 3.00 A and I2 = 5.00 A in the direction indicated in Figure P19.50. (a) Find the magnitude and direction of the magnetic field at a point midway between...

Q: A wire carries a 7.00 - A current along the

A wire carries a 7.00 - A current along the x - axis, and another wire carries a 6.00 - A current along the y - axis, as shown in Figure P19.51. What is the magnetic field at point P, located at x = 4...

Q: A long, straight wire lies on a horizontal table in the

A long, straight wire lies on a horizontal table in the xy - plane and carries a current of 1.20 μA in the positive x - direction along the x - axis. A proton is traveling in the negative x - directio...

Q: The magnetic field 40.0 cm away from a long,

The magnetic field 40.0 cm away from a long, straight wire carrying current 2.00 A is 1.00 μT. (a) At what distance is it 0.100 μT? (b) At one instant, the two conductors in a long household extension...

Q: The north - pole end of a bar magnet is held near

The north - pole end of a bar magnet is held near a stationary positively charged piece of plastic. Is the plastic (a) Attracted, (b) Repelled, or (c) Unaffected by the magnet?

Q: Two long, parallel wires separated by a distance 2d carry equal

Two long, parallel wires separated by a distance 2d carry equal currents in the same direction. An end view of the two wires is shown in Figure P19.54, where the currents are out of the page. (a) What...