# Physics equations/22-Magnetism/Q:forces/Testbank

## D

1 A cosmic ray alpha particle encounters Earth's magnetic field at right angles to a field of 14.8 μT. The kinetic energy is 441 keV. What is the radius of particle's orbit?

 a) 2 x 102 m. b) 6.5 x 102 m. c) 2 x 103 m. d) 6.5 x 103 m. e) 2 x 104 m.

2 Two parallel wires are 5.8 meters long, and are separated by 2.9 mm. What is the force if both wires carry a current of 16.5 amps?

 a) 3.44 x 10-3 newtons b) 1.09 x 10-2 newtons c) 3.44 x 10-2 newtons d) 1.09 x 10-1 newtons e) 3.44 x 10-1 newtons

3 Blood is flowing at an average rate of 28.5 cm/s in an artery that has an inner diameter of 3.9 mm. What is the voltage across a hall probe placed across the inner diameter of the artery if the perpendicular magnetic field is 0.17 Tesla?

 a) 1.89 x 10-6 Volts b) 5.98 x 10-6 Volts c) 1.89 x 10-5 Volts d) 5.98 x 10-5 Volts e) 1.89 x 10-4 Volts

4 An electron tube on Earth's surface is oriented horizontally towards magnetic north. The electron is traveling at 0.14c, and Earth's magnetic field makes an angle of 48.5 degrees with respect to the horizontal. To counter the magnetic force, a voltage is applied between two large parallel plates that are 36 mm apart. What must be the applied voltage if the magnetic field is 39μT?

 a) 4.4 x 100 volts b) 1.4 x 101 volts c) 4.4 x 101 volts d) 1.4 x 102 volts e) 4.4 x 102 volts

## E

1 A cosmic ray alpha particle encounters Earth's magnetic field at right angles to a field of 9.8 μT. The kinetic energy is 392 keV. What is the radius of particle's orbit?

 a) 2.9 x 103 m. b) 9.2 x 103 m. c) 2.9 x 104 m. d) 9.2 x 104 m. e) 2.9 x 105 m.

2 Two parallel wires are 5 meters long, and are separated by 4.1 mm. What is the force if both wires carry a current of 9.5 amps?

 a) 6.96 x 10-3 newtons b) 2.2 x 10-2 newtons c) 6.96 x 10-2 newtons d) 2.2 x 10-1 newtons e) 6.96 x 10-1 newtons

3 Blood is flowing at an average rate of 23.5 cm/s in an artery that has an inner diameter of 4.8 mm. What is the voltage across a hall probe placed across the inner diameter of the artery if the perpendicular magnetic field is 0.19 Tesla?

 a) 6.78 x 10-5 Volts b) 2.14 x 10-4 Volts c) 6.78 x 10-4 Volts d) 2.14 x 10-3 Volts e) 6.78 x 10-3 Volts

4 An electron tube on Earth's surface is oriented horizontally towards magnetic north. The electron is traveling at 0.1c, and Earth's magnetic field makes an angle of 22.5 degrees with respect to the horizontal. To counter the magnetic force, a voltage is applied between two large parallel plates that are 58 mm apart. What must be the applied voltage if the magnetic field is 34μT?

 a) 7.2 x 10-1 volts b) 2.3 x 100 volts c) 7.2 x 100 volts d) 2.3 x 101 volts e) 7.2 x 101 volts

## F

1 A cosmic ray alpha particle encounters Earth's magnetic field at right angles to a field of 20.7 μT. The kinetic energy is 399 keV. What is the radius of particle's orbit?

 a) 4.4 x 101 m. b) 1.4 x 102 m. c) 4.4 x 102 m. d) 1.4 x 103 m. e) 4.4 x 103 m.

2 Two parallel wires are 6.9 meters long and are separated by 7.1 mm. What is the force if both wires carry a current of 8.2 amps?

 a) 1.31 x 10-2 newtons b) 4.13 x 10-2 newtons c) 1.31 x 10-1 newtons d) 4.13 x 10-1 newtons e) 1.31 x 100 newtons

3 Blood is flowing at an average rate of 28.5 cm/s in an artery that has an inner diameter of 4.3 mm. What is the voltage across a hall probe placed across the inner diameter of the artery if the perpendicular magnetic field is 0.14 Tesla?

 a) 5.43 x 10-5 Volts b) 1.72 x 10-4 Volts c) 5.43 x 10-4 Volts d) 1.72 x 10-3 Volts e) 5.43 x 10-3 Volts

4 An electron tube on Earth's surface is oriented horizontally towards magnetic north. The electron is traveling at 0.08c, and Earth's magnetic field makes an angle of 21.5 degrees with respect to the horizontal. To counter the magnetic force, a voltage is applied between two large parallel plates that are 53 mm apart. What must be the applied voltage if the magnetic field is 33μT?

 a) 4.9 x 10-1 volts b) 1.5 x 100 volts c) 4.9 x 100 volts d) 1.5 x 101 volts e) 4.9 x 101 volts

## G

1 A cosmic ray alpha particle encounters Earth's magnetic field at right angles to a field of 17.5 μT. The kinetic energy is 455 keV. What is the radius of particle's orbit?

 a) 5.6 x 102 m. b) 1.8 x 103 m. c) 5.6 x 103 m. d) 1.8 x 104 m. e) 5.6 x 104 m.

2 Two parallel wires are 7.5 meters long and are separated by 4.8 mm. What is the force if both wires carry a current of 8.5 amps?

 a) 7.14 x 10-3 newtons b) 2.26 x 10-2 newtons c) 7.14 x 10-2 newtons d) 2.26 x 10-1 newtons e) 7.14 x 10-1 newtons

3 Blood is flowing at an average rate of 15.5 cm/s in an artery that has an inner diameter of 3.6 mm. What is the voltage across a hall probe placed across the inner diameter of the artery if the perpendicular magnetic field is 0.11 Tesla?

 a) 1.94 x 10-6 Volts b) 6.14 x 10-6 Volts c) 1.94 x 10-5 Volts d) 6.14 x 10-5 Volts e) 1.94 x 10-4 Volts

4 An electron tube on Earth's surface is oriented horizontally towards magnetic north. The electron is traveling at 0.09c, and Earth's magnetic field makes an angle of 37.5 degrees with respect to the horizontal. To counter the magnetic force, a voltage is applied between two large parallel plates that are 39 mm apart. What must be the applied voltage if the magnetic field is 36μT?

 a) 2.3 x 100 volts b) 7.3 x 100 volts c) 2.3 x 101 volts d) 7.3 x 101 volts e) 2.3 x 102 volts

## H

1 A cosmic ray alpha particle encounters Earth's magnetic field at right angles to a field of 6.9 μT. The kinetic energy is 379 keV. What is the radius of particle's orbit?

 a) 1.3 x 104 m. b) 4.1 x 104 m. c) 1.3 x 105 m. d) 4.1 x 105 m. e) 1.3 x 106 m.

2 Two parallel wires are 6.4 meters long and are separated by 4.3 mm. What is the force if both wires carry a current of 17.2 amps?

 a) 8.81 x 10-2 newtons b) 2.78 x 10-1 newtons c) 8.81 x 10-1 newtons d) 2.78 x 100 newtons e) 8.81 x 100 newtons

3 Blood is flowing at an average rate of 19.5 cm/s in an artery that has an inner diameter of 4.3 mm. What is the voltage across a hall probe placed across the inner diameter of the artery if the perpendicular magnetic field is 0.17 Tesla?

 a) 1.43 x 10-6 Volts b) 4.51 x 10-6 Volts c) 1.43 x 10-5 Volts d) 4.51 x 10-5 Volts e) 1.43 x 10-4 Volts

4 An electron tube on Earth's surface is oriented horizontally towards magnetic north. The electron is traveling at 0.11c, and Earth's magnetic field makes an angle of 48.5 degrees with respect to the horizontal. To counter the magnetic force, a voltage is applied between two large parallel plates that are 57 mm apart. What must be the applied voltage if the magnetic field is 45μT?

 a) 2 x 101 volts b) 6.3 x 101 volts c) 2 x 102 volts d) 6.3 x 102 volts e) 2 x 103 volts

## I

1 A cosmic ray alpha particle encounters Earth's magnetic field at right angles to a field of 12.8 μT. The kinetic energy is 334 keV. What is the radius of particle's orbit?

 a) 6.5 x 103 m. b) 2.1 x 104 m. c) 6.5 x 104 m. d) 2.1 x 105 m. e) 6.5 x 105 m.

2 Two parallel wires are 4.3 meters long and are separated by 4.7 mm. What is the force if both wires carry a current of 14.3 amps?

 a) 3.74 x 10-2 newtons b) 1.18 x 10-1 newtons c) 3.74 x 10-1 newtons d) 1.18 x 100 newtons e) 3.74 x 100 newtons

3 Blood is flowing at an average rate of 17.5 cm/s in an artery that has an inner diameter of 3.6 mm. What is the voltage across a hall probe placed across the inner diameter of the artery if the perpendicular magnetic field is 0.18 Tesla?

 a) 1.13 x 10-6 Volts b) 3.59 x 10-6 Volts c) 1.13 x 10-5 Volts d) 3.59 x 10-5 Volts e) 1.13 x 10-4 Volts

4 An electron tube on Earth's surface is oriented horizontally towards magnetic north. The electron is traveling at 0.12c, and Earth's magnetic field makes an angle of 27.5 degrees with respect to the horizontal. To counter the magnetic force, a voltage is applied between two large parallel plates that are 45 mm apart. What must be the applied voltage if the magnetic field is 46μT?

 a) 1.1 x 101 volts b) 3.4 x 101 volts c) 1.1 x 102 volts d) 3.4 x 102 volts e) 1.1 x 103 volts

## J

1 A cosmic ray alpha particle encounters Earth's magnetic field at right angles to a field of 13.6 μT. The kinetic energy is 446 keV. What is the radius of particle's orbit?

 a) 7.1 x 102 m. b) 2.2 x 103 m. c) 7.1 x 103 m. d) 2.2 x 104 m. e) 7.1 x 104 m.

2 Two parallel wires are 4.4 meters long and are separated by 6.3 mm. What is the force if both wires carry a current of 11.8 amps?

 a) 1.94 x 10-3 newtons b) 6.15 x 10-3 newtons c) 1.94 x 10-2 newtons d) 6.15 x 10-2 newtons e) 1.94 x 10-1 newtons

3 Blood is flowing at an average rate of 19.5 cm/s in an artery that has an inner diameter of 4.5 mm. What is the voltage across a hall probe placed across the inner diameter of the artery if the perpendicular magnetic field is 0.15 Tesla?

 a) 1.32 x 10-5 Volts b) 4.16 x 10-5 Volts c) 1.32 x 10-4 Volts d) 4.16 x 10-4 Volts e) 1.32 x 10-3 Volts

4 An electron tube on Earth's surface is oriented horizontally towards magnetic north. The electron is traveling at 0.09c, and Earth's magnetic field makes an angle of 47.5 degrees with respect to the horizontal. To counter the magnetic force, a voltage is applied between two large parallel plates that are 40 mm apart. What must be the applied voltage if the magnetic field is 36μT?

 a) 9.1 x 10-1 volts b) 2.9 x 100 volts c) 9.1 x 100 volts d) 2.9 x 101 volts e) 9.1 x 101 volts

## K

1 A cosmic ray alpha particle encounters Earth's magnetic field at right angles to a field of 16 μT. The kinetic energy is 365 keV. What is the radius of particle's orbit?

 a) 5.5 x 103 m. b) 1.7 x 104 m. c) 5.5 x 104 m. d) 1.7 x 105 m. e) 5.5 x 105 m.

2 Two parallel wires are 4.8 meters long and are separated by 5 mm. What is the force if both wires carry a current of 13.8 amps?

 a) 1.16 x 10-2 newtons b) 3.66 x 10-2 newtons c) 1.16 x 10-1 newtons d) 3.66 x 10-1 newtons e) 1.16 x 100 newtons

3 Blood is flowing at an average rate of 35.5 cm/s in an artery that has an inner diameter of 3.6 mm. What is the voltage across a hall probe placed across the inner diameter of the artery if the perpendicular magnetic field is 0.13 Tesla?

 a) 5.25 x 10-5 Volts b) 1.66 x 10-4 Volts c) 5.25 x 10-4 Volts d) 1.66 x 10-3 Volts e) 5.25 x 10-3 Volts

4 An electron tube on Earth's surface is oriented horizontally towards magnetic north. The electron is traveling at 0.06c, and Earth's magnetic field makes an angle of 36.5 degrees with respect to the horizontal. To counter the magnetic force, a voltage is applied between two large parallel plates that are 46 mm apart. What must be the applied voltage if the magnetic field is 44μT?

 a) 6.8 x 10-1 volts b) 2.2 x 100 volts c) 6.8 x 100 volts d) 2.2 x 101 volts e) 6.8 x 101 volts

## L

1 A cosmic ray alpha particle encounters Earth's magnetic field at right angles to a field of 23.7 μT. The kinetic energy is 438 keV. What is the radius of particle's orbit?

 a) 4 x 103 m. b) 1.3 x 104 m. c) 4 x 104 m. d) 1.3 x 105 m. e) 4 x 105 m.

2 Two parallel wires are 7.3 meters long and are separated by 6.7 mm. What is the force if both wires carry a current of 9.3 amps?

 a) 1.88 x 10-3 newtons b) 5.96 x 10-3 newtons c) 1.88 x 10-2 newtons d) 5.96 x 10-2 newtons e) 1.88 x 10-1 newtons

3 Blood is flowing at an average rate of 16.5 cm/s in an artery that has an inner diameter of 4.7 mm. What is the voltage across a hall probe placed across the inner diameter of the artery if the perpendicular magnetic field is 0.15 Tesla?

 a) 1.16 x 10-5 Volts b) 3.68 x 10-5 Volts c) 1.16 x 10-4 Volts d) 3.68 x 10-4 Volts e) 1.16 x 10-3 Volts

4 An electron tube on Earth's surface is oriented horizontally towards magnetic north. The electron is traveling at 0.06c, and Earth's magnetic field makes an angle of 45.5 degrees with respect to the horizontal. To counter the magnetic force, a voltage is applied between two large parallel plates that are 45 mm apart. What must be the applied voltage if the magnetic field is 36μT?

 a) 2.1 x 100 volts b) 6.6 x 100 volts c) 2.1 x 101 volts d) 6.6 x 101 volts e) 2.1 x 102 volts

## M

1 A cosmic ray alpha particle encounters Earth's magnetic field at right angles to a field of 11.8 μT. The kinetic energy is 353 keV. What is the radius of particle's orbit?

 a) 2.3 x 103 m. b) 7.3 x 103 m. c) 2.3 x 104 m. d) 7.3 x 104 m. e) 2.3 x 105 m.

2 Two parallel wires are 5.4 meters long and are separated by 5.2 mm. What is the force if both wires carry a current of 9.4 amps?

 a) 5.8 x 10-3 newtons b) 1.84 x 10-2 newtons c) 5.8 x 10-2 newtons d) 1.84 x 10-1 newtons e) 5.8 x 10-1 newtons

3 Blood is flowing at an average rate of 21.5 cm/s in an artery that has an inner diameter of 4.3 mm. What is the voltage across a hall probe placed across the inner diameter of the artery if the perpendicular magnetic field is 0.18 Tesla?

 a) 5.26 x 10-5 Volts b) 1.66 x 10-4 Volts c) 5.26 x 10-4 Volts d) 1.66 x 10-3 Volts e) 5.26 x 10-3 Volts

4 An electron tube on Earth's surface is oriented horizontally towards magnetic north. The electron is traveling at 0.06c, and Earth's magnetic field makes an angle of 25.5 degrees with respect to the horizontal. To counter the magnetic force, a voltage is applied between two large parallel plates that are 39 mm apart. What must be the applied voltage if the magnetic field is 34μT?

 a) 3.2 x 100 volts b) 1 x 101 volts c) 3.2 x 101 volts d) 1 x 102 volts e) 3.2 x 102 volts