11.2 & 11.4 - Electromagnetism

11.2 Applications of Induced Current

By Ms. Alaa Mattar

Warmer Activity

By Ms. Alaa Mattar​

Multiple Choice

Magnetic field lines go from:

• South to North

• North to South

Learning Check Point 1

By Ms. Alaa Mattar​

Multiple Choice

What is Lenz's Law?

• is when an induced electric current flows in a direction such that the current opposes the change that induced it.

• the property of a wire to create an induced EMF that opposes the change in the potential difference across the wire

Multiple Choice

If a generator is not in a circuit does it generate current?

• Nooo way

• Yesss

Multiple Choice

When a mechanical load is placed on a motor, the rotation of the motor _____

• slows

• speeds up

Learning Check Point 2

By Ms. Alaa Mattar​

Multiple Choice

Where can we find eddy current?

• Inside the coil

• inside a conductor (such as a metal)

Multiple Choice

Which is the term for the property of a wire to create an induced EMF that opposes the change in the potential difference across the wire?

• resistivity

• conductivity

• self-inductance

• mutual inductance

Plenary​

​

That is enough physics for today​

By Ms. Alaa Mattar​

Open Ended

Any questions?

11.4 Applications of Induced Current

By Ms. Alaa Mattar

Learning Check Point 1

By Ms. Alaa Mattar​

Multiple Choice

A radio-wave has a wavelength that is closest to the size of a(n) _______.

• house

• molecule

• cell

• proton

Multiple Choice

An infrared wave has a wavelength that is closest to the size of a(n) _______.

• house

• molecule

• cell

• proton

Learning Check Point 2

By Ms. Alaa Mattar​

Multiple Choice

Which is the term for a device that converts voice, music, pictures, or data to electronic signals, amplifies the signals, and then sends the signals?

• receiver

• transmitter

• dielectric

• antenna

Learning Check Point 3

By Ms. Alaa Mattar​

Multiple Choice

A wire antenna is most efficient when its length is _______ the length of the wave it is designed to detect

• double

• the same as

• one-half

• one-quarter

Plenary​

​

Bye Bye Chapter 21!

By Ms. Alaa Mattar​

Open Ended

Any questions?