10.2 - Applying Magnetic Forces

Where is the the pushing or pulling force of a magnet strongest?

• In the middle of the magnet

• At the ends of the magnet

• Same all the way through the magnet

• none of them

This is a picture of a simple electromagnet. How can the electromagnet be made stronger?

• Add more coils of wire to the nail.
• Use a smaller battery.
• Reverse the poles of the magnet.
• Remove all the coils and the nail.

Why does a compass needle point north?

• Because it is being attracted to the Magnetic South Pole

• Because north is up

• Because it is being attracted to the Magnetic North Pole

• Because north is down

In the figure shown, the direction of the magnetic field is ________.

• out of the page

• into the page

What is the direction of the force exerted on the current-carrying wire shown in the figure?

• upward

• downward

• to the right

• to the left

Which of the following can increase the magnitude of the force by a magnetic field on a current-carrying wire? You can select more than one option.

• Increasing the current in the wire

• Decreasing the current in the wire

• Increasing the length of the wire

• Decreasing the length of the wire

• Increasing the strength of the magnetic field.

Which of the following is used to measure very small currents?

• galvanometers

• ammeters

• voltmeters

• electric motors

Which of the following is used to measure large currents?

• galvanometers

• ammeters

• voltmeters

• electric motors

Which of the following is used to measure voltage?

• galvanometers

• ammeters

• voltmeters

• batman

A faster moving charged particle would experience a larger magnetic force than a slower moving charged particle.

• True

• False