Biot-Savart Law

1) A wire carries a current, creating a magnetic field around itself as shown. The current in the wire is:

• A. Directed to the right

• A. Directed to the left

• A. Equal to the magnetic field

• In the same direction as the magnetic field

1) A straight wire carries a current inside the paper. What is the direction of the magnetic field at point P?

• Points to the right

• Points to the left

• Points to the top of the page

• Points to the bottom of the page

1) A wire carries current I directed to the right as shown in the figure below. What is the direction of the magnetic field generated by the wire at point A?

• To the right

• To the left

• Toward the wire

• Into the page

The strength of the magnetic field at a point x near a long straight current carrying conductor is B. The field at a distance x/2 will be -----------

• B/2

• B/4

• 2 B

• 4 B

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Solenoid #1 has a length L, cross-sectional area A, and N turns. Solenoid #2 has a length 2L, cross-sectional area 2A, and 2N turns. Which solenoid has the greater magnetic field at its center when equal currents are going through them?

• #1

• #2

• Both have the same magnetic field.

• Since it depends on the values of A and L, none of the above are correct

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

1) Two long parallel wires 40 cm apart are carrying currents of 10 A and 20 A in the opposite direction. What is the magnitude of the magnetic field halfway between the wires?

• 1.0 x 10^-5 T

• 2.0 x 10^-5 T

• 3.0 x 10^-5 T

• 4.0 x 10^-5 T

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

1) A superconducting wire carries a current of 10^4 A. Find the magnetic field at a distance of 1.0 m from the wire.

• 2 x 10^-3 T

• 8 x 10^-3 T

• 1.6 x 10^-2 T

• 3.2 x 10^-2 T

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5