A flat conductor of thickness 0.500 mm is placed in a magnetic field of 0.200 T perpendicular to the flat surface. If there are 8.00 × 1024 charge carriers (i.e., electrons) per m3, what is the Hall voltage generated when 3.40 A flows along the conductor?

A) 0.266 mV B) 0.531 mV C) 0.797 mV D) 1.06 mV E) 2.12 mV A) 0.266 mV B) 0.531 mV C) 0.797 mV D) 1.06 mV E) 2.12 mV

A cyclotron is designed to accelerate protons (mass 1.67 × 10−27 kg) up to a kinetic energy of 2.5 × 10−13 J. If the magnetic field in the cyclotron is 0.75 T, what is the radius of the dipole magnets in the cyclotron?

A) 14 cm B) 24 cm C) 17 cm D) 5.8 cm A) 14 cm B) 24 cm C) 17 cm D) 5.8 cm

Exam 19: Magnetic Forces and Fields

A charged particle enters a region of uniform magnetic field at a speed of 2.8 × 10⁴ m/s, at an angle of 37 degrees relative to the magnetic field direction. What will be the magnitude of the component of the particle's velocity that is parallel to the magnetic field while it is in this region?

(Multiple Choice)

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Question 41

Which of the following magnetic materials has domains?

(Multiple Choice)

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Question 42

The SI unit of magnetic field is the tesla, which is equivalent to a

(Multiple Choice)

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Question 43

A bar magnet has a north pole and a south pole. This arrangement is referred to as a

(Multiple Choice)

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Question 44

The magnetic force on a point charge in a given magnetic field and at a given speed is largest when the charge

(Multiple Choice)

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Question 45

Doubling the current, number of turns, the area, and the ambient magnetic field for a coil changes the maximum torque it can experience by what factor?

(Multiple Choice)

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Question 46

One wire, lying on the x-axis, carries a current of 8.0 A in the positive x-direction. Another wire, lying on the y-axis, carries a current of 12 A in the positive y-direction. What is the magnitude of the magnetic field at (x, y) = (8.0 cm, 12.0 cm)?

(Multiple Choice)

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Question 47

If the charge carriers are positive instead of negative, what difference will result when measuring the Hall voltage?

(Multiple Choice)

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Question 48

A negative ion is moving east near the equator where the Earth's magnetic field is horizontal to the north. The direction of the magnetic force on the ion is

(Multiple Choice)

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Question 49

An electron is moving at 3.0 × 10⁶ m/s at an angle of 40° to a 0.80 T magnetic field. What is the magnitude of the force on the electron?

(Multiple Choice)

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Question 50

A flat conductor of thickness 0.500 mm is placed in a magnetic field of 0.200 T perpendicular to the flat surface. If there are 8.00 × 10²⁴ charge carriers (i.e., electrons) per m³, what is the Hall voltage generated when 3.40 A flows along the conductor?

(Multiple Choice)

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(78)

Question 51

A straight wire is carrying a current upward. Observed from above (i.e., looking downward towards the wire), the magnetic field lines are

(Multiple Choice)

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Question 52

A 3.0 cm section of a horizontal wire, carrying a 6.7 A current from east to west, is placed in a horizontal north-to-south 0.42 T uniform magnetic field in the lab. In what direction is the magnetic force on the 3.0 cm section?

(Multiple Choice)

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Question 53

Two concentric circular wire loops in the same plane each carry a current. The larger loop has a current of 8.46 A circulating clockwise and has a radius of 6.20 cm. The smaller loop has a radius of 4.42 cm. What is the magnitude and direction of the current in the smaller loop if the total magnetic field at the center of the system is zero?

(Multiple Choice)

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Question 54

A 300-turn coil of area 25 cm² is placed in an 80 mT magnetic field. If the coil carries a current of 3.3 A and if the normal to the area of the coil makes an angle of 20° with the direction of the magnetic field, what is the magnitude of the torque on the coil?

(Multiple Choice)

4.9/5

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Question 55

A charged particle having electric charge Q = 4.0e enters a region of magnetic field 1.2 T at an angle of θ relative to the magnetic field direction. If the speed of the particle upon entering the region is 2.8 × 10⁴ m/s, and the magnitude of the force on it is 1.3 × 10^-14 N, which of the following could be the angle θ?

(Multiple Choice)

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Question 56

In a velocity selector for ions, when the velocity of the ions is double the value for which the selector is set, how do the magnetic force F_M and the electric force F_E compare?

(Multiple Choice)

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Question 57

In ancient times permanent magnets were known to the Greeks. These magnets were chunks of iron ore now called magnetite. What is the older name for this material?

(Multiple Choice)

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Question 58

A cyclotron is designed to accelerate protons (mass 1.67 × 10⁻²⁷ kg) up to a kinetic energy of 2.5 × 10⁻¹³ J. If the magnetic field in the cyclotron is 0.75 T, what is the radius of the dipole magnets in the cyclotron?

(Multiple Choice)

4.9/5

(84)

Question 59

A proton is moving at 2.0 × 10⁷ m/s in a magnetic field of 30 mT. What is the magnitude of the magnetic force on the proton?

(Multiple Choice)

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(80)

Question 60

Showing 41 - 60 of 68

Exam 19: Magnetic Forces and Fields

A charged particle enters a region of uniform magnetic field at a speed of 2.8 × 104 m/s, at an angle of 37 degrees relative to the magnetic field direction. What will be the magnitude of the component of the particle's velocity that is parallel to the magnetic field while it is in this region?

Which of the following magnetic materials has domains?

The SI unit of magnetic field is the tesla, which is equivalent to a

A bar magnet has a north pole and a south pole. This arrangement is referred to as a

The magnetic force on a point charge in a given magnetic field and at a given speed is largest when the charge

Doubling the current, number of turns, the area, and the ambient magnetic field for a coil changes the maximum torque it can experience by what factor?

One wire, lying on the x-axis, carries a current of 8.0 A in the positive x-direction. Another wire, lying on the y-axis, carries a current of 12 A in the positive y-direction. What is the magnitude of the magnetic field at (x, y) = (8.0 cm, 12.0 cm)?

If the charge carriers are positive instead of negative, what difference will result when measuring the Hall voltage?

A negative ion is moving east near the equator where the Earth's magnetic field is horizontal to the north. The direction of the magnetic force on the ion is

An electron is moving at 3.0 × 106 m/s at an angle of 40° to a 0.80 T magnetic field. What is the magnitude of the force on the electron?

A flat conductor of thickness 0.500 mm is placed in a magnetic field of 0.200 T perpendicular to the flat surface. If there are 8.00 × 1024 charge carriers (i.e., electrons) per m3, what is the Hall voltage generated when 3.40 A flows along the conductor?

A straight wire is carrying a current upward. Observed from above (i.e., looking downward towards the wire), the magnetic field lines are

A 3.0 cm section of a horizontal wire, carrying a 6.7 A current from east to west, is placed in a horizontal north-to-south 0.42 T uniform magnetic field in the lab. In what direction is the magnetic force on the 3.0 cm section?

A 300-turn coil of area 25 cm2 is placed in an 80 mT magnetic field. If the coil carries a current of 3.3 A and if the normal to the area of the coil makes an angle of 20° with the direction of the magnetic field, what is the magnitude of the torque on the coil?

In a velocity selector for ions, when the velocity of the ions is double the value for which the selector is set, how do the magnetic force FM and the electric force FE compare?

In ancient times permanent magnets were known to the Greeks. These magnets were chunks of iron ore now called magnetite. What is the older name for this material?

A cyclotron is designed to accelerate protons (mass 1.67 × 10−27 kg) up to a kinetic energy of 2.5 × 10−13 J. If the magnetic field in the cyclotron is 0.75 T, what is the radius of the dipole magnets in the cyclotron?

A proton is moving at 2.0 × 107 m/s in a magnetic field of 30 mT. What is the magnitude of the magnetic force on the proton?

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A charged particle enters a region of uniform magnetic field at a speed of 2.8 × 10⁴ m/s, at an angle of 37 degrees relative to the magnetic field direction. What will be the magnitude of the component of the particle's velocity that is parallel to the magnetic field while it is in this region?

An electron is moving at 3.0 × 10⁶ m/s at an angle of 40° to a 0.80 T magnetic field. What is the magnitude of the force on the electron?

A flat conductor of thickness 0.500 mm is placed in a magnetic field of 0.200 T perpendicular to the flat surface. If there are 8.00 × 10²⁴ charge carriers (i.e., electrons) per m³, what is the Hall voltage generated when 3.40 A flows along the conductor?

A 300-turn coil of area 25 cm² is placed in an 80 mT magnetic field. If the coil carries a current of 3.3 A and if the normal to the area of the coil makes an angle of 20° with the direction of the magnetic field, what is the magnitude of the torque on the coil?

In a velocity selector for ions, when the velocity of the ions is double the value for which the selector is set, how do the magnetic force F_M and the electric force F_E compare?

A cyclotron is designed to accelerate protons (mass 1.67 × 10⁻²⁷ kg) up to a kinetic energy of 2.5 × 10⁻¹³ J. If the magnetic field in the cyclotron is 0.75 T, what is the radius of the dipole magnets in the cyclotron?

A proton is moving at 2.0 × 10⁷ m/s in a magnetic field of 30 mT. What is the magnitude of the magnetic force on the proton?