Topics are: 1. Farady's Law 2.Lenz's Law 3. Voltage Induced in a conductor. 4.Voltage equation in generator.

1. PRESENTATION

2. FARADAY’S LAW
• First Law
• Second Law 𝜀 = 𝑁
𝑑𝜑
𝑑𝑡
S N
v
emf

3. LENZ'S LAW
Lenz's law states that when an emf is generated by a change in
magnetic flux according to Faraday's Law, the polarity of the
induced emf is such, that it produces an current that's magnetic
field opposes the change which produces it.
𝜀 = −𝑁
𝑑𝜑
𝑑𝑡

4. VOLTAGE INDUCED IN A
CONDUCTOR

5. VOLTAGE EQUATION IN
GENERATOR
𝐸𝑔 =
𝑍
𝑎
×
𝜑𝑃(
𝑟
min
)
60
volts
Or, 𝐸𝑔 =
𝑍
𝑎
×
𝜑𝑃𝑁
60
volts
Where,
Φ = flux
Z = total number of armature conductors
P = Number of generator poles
a = Number of parallel paths in armature
N =
𝑟
min
=armature rotation in revolutions per minute (r.p.m)
E = e.m.f induced in any parallel path in armature

6. THANK YOU