Magnetic Fields - MCAT Chemical and Physical Foundations of Biological Systems

First, magnetic field lines, like electric field lines, can never cross. Also, unlike electric field lines, magnetic field lines are continuous—they do not have starting or ending points. Next, the force experienced by a charge in a magnetic field depends on the charge's velocity direction, not just the magnetic field. So the only remaining choice is that magnetic field lines show both the relative strength and direction of the field.

A charged particle in a particle accelerator moves in uniform circular motion. The equation for centripetal force caused by uniform circular motion is:

The equation for magnetic force is:

Set the equations equal to each other, and solve for velocity.

The only answer choice that does not correspond to an increase in velocity is increasing the mass of the particles in the accelerator.

We use the formula for force on a wire in a magnetic field:

Where = force, = current, = length of wire, and = magnetic mield

Recall that , where . The shape, material characteristics, and resistance do not appear in this equation. So only the size (area) of the loop influences the emf.

First, magnetic field lines, like electric field lines, can never cross. Also, unlike electric field lines, magnetic field lines are continuous—they do not have starting or ending points. Next, the force experienced by a charge in a magnetic field depends on the charge's velocity direction, not just the magnetic field. So the only remaining choice is that magnetic field lines show both the relative strength and direction of the field.

A charged particle in a particle accelerator moves in uniform circular motion. The equation for centripetal force caused by uniform circular motion is:

The equation for magnetic force is:

Set the equations equal to each other, and solve for velocity.

The only answer choice that does not correspond to an increase in velocity is increasing the mass of the particles in the accelerator.

We use the formula for force on a wire in a magnetic field:

Where = force, = current, = length of wire, and = magnetic mield

First, magnetic field lines, like electric field lines, can never cross. Also, unlike electric field lines, magnetic field lines are continuous—they do not have starting or ending points. Next, the force experienced by a charge in a magnetic field depends on the charge's velocity direction, not just the magnetic field. So the only remaining choice is that magnetic field lines show both the relative strength and direction of the field.

Recall that , where . The shape, material characteristics, and resistance do not appear in this equation. So only the size (area) of the loop influences the emf.

A charged particle in a particle accelerator moves in uniform circular motion. The equation for centripetal force caused by uniform circular motion is:

The equation for magnetic force is:

Set the equations equal to each other, and solve for velocity.

The only answer choice that does not correspond to an increase in velocity is increasing the mass of the particles in the accelerator.

We use the formula for force on a wire in a magnetic field:

Where = force, = current, = length of wire, and = magnetic mield

Recall that , where . The shape, material characteristics, and resistance do not appear in this equation. So only the size (area) of the loop influences the emf.

First, magnetic field lines, like electric field lines, can never cross. Also, unlike electric field lines, magnetic field lines are continuous—they do not have starting or ending points. Next, the force experienced by a charge in a magnetic field depends on the charge's velocity direction, not just the magnetic field. So the only remaining choice is that magnetic field lines show both the relative strength and direction of the field.

A charged particle in a particle accelerator moves in uniform circular motion. The equation for centripetal force caused by uniform circular motion is:

The equation for magnetic force is:

Set the equations equal to each other, and solve for velocity.

The only answer choice that does not correspond to an increase in velocity is increasing the mass of the particles in the accelerator.

We use the formula for force on a wire in a magnetic field:

Where = force, = current, = length of wire, and = magnetic mield

Recall that , where . The shape, material characteristics, and resistance do not appear in this equation. So only the size (area) of the loop influences the emf.

First, magnetic field lines, like electric field lines, can never cross. Also, unlike electric field lines, magnetic field lines are continuous—they do not have starting or ending points. Next, the force experienced by a charge in a magnetic field depends on the charge's velocity direction, not just the magnetic field. So the only remaining choice is that magnetic field lines show both the relative strength and direction of the field.

A charged particle in a particle accelerator moves in uniform circular motion. The equation for centripetal force caused by uniform circular motion is:

The equation for magnetic force is:

Set the equations equal to each other, and solve for velocity.

The only answer choice that does not correspond to an increase in velocity is increasing the mass of the particles in the accelerator.

We use the formula for force on a wire in a magnetic field:

Where = force, = current, = length of wire, and = magnetic mield