Waves & Electromagnetic Induction Quiz

How can you induce a voltage with a magnet and coil of wire?

Moving a magnet through coiled wire

How does increasing the number of coils affect the voltage induced?

Increase voltage

What are some applications of Faradays’ Law?

Traffic lights, metal detectors, credit cards, hard drives

Can a transformer change power? current? Voltage?

current and voltage

Define medium

Substance that carries the wave

Define frequency

number of cycles/time

define period

time to complete one cycle

Relationship between frequency and period

Inverse- f=1/T, T=1/f

2 equations for wave speed

s=d/t, v=fㅅ

units for speed

m/s

units for period

s

units for wavelength

m

units for frequency

Hz

Transverse waves

disturbance is perpendicular to wave

Longitudinal waves

disturbance to is parallel to wave

Mechanical waves

require a medium

electromagnetic waves

don’t require a medium

which factor affect the speed of a wave

property of the medium

constructive interference

pulse on same side (greater amplitude)

destructive interterence

pulse on opposite side (amplitude cancel)

What happens when a wave reflects off a rigid barrier

The pulse flips to other side (out of phase)

What happens when a wave reflects off a loose barrier

The pulse stays on same side (in phase)