FARADAY'S LAW AND LENZ'S LAW + a bit of transformers

The magnetic field oriented into the page has an initial field strength of 5 Tesla into the page. It changes to 2 Tesla into the page. What is the direction of the induced current?

• CW

• CCW

Magnetic flux is measured in

• teslas

• coulombs

• webers

• farads

A conductive loop moves downward into the magnetic field as shown in the diagram. Which way will the induced current flow in the conductive loop?

• Clockwise

• Anti-clockwise

Can you produce current in a wire with a magnet that is sitting still?

• Yes; having a magnet near a wire is enough to excite the electrons

• No; the magnetic field has to be changing to excite the electrons

• No; magnets cannot create electricity

The magnetic field oriented out of the page has an initial strength of 6 Tesla. Over time the field out of the page increases to 10 Tesla out of the page. What is the direction of induced current in the loop?

• Clockwise

• Anticlockwise

If you wrap more coils around an electromagnet, it will become...

• brighter
• stronger
• weaker
• invisible

Find the direction of the magnetic force assuming the charge is negative.

• Into the screen

• Out of the screen

• Right

• Left

What is the direction of the induced magnetic field?

• Left
• Right
• Up
• Down

What is the direction of the induced magnetic field?

• Left
• Right
• Up
• Down

In what direction is the magnet moving?

• Left
• Right
• Up
• Down