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Magnetics > Electromagnetic Induction > Flashcards

Electromagnetic Induction Flashcards

1
Q

Flux formula

A
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2
Q

Emf formula w.r.t flux

A
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3
Q

Emf formula w.r.t B L V with vector form

A
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4
Q

how to find the positive terminal of the emf induced in a wire

A
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5
Q

induced emf in loop by rotating in field

A

A—> area

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6
Q

Emf Formula if rotating rod in a Magnetic field

A

l represents displacement lentgh

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7
Q

What to replace theta with if an area is rotating with omega angular speed

A

omega * t

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8
Q

induced electric field relation with flux or emf

A
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9
Q

are magnetic field lines closed ?!

A

yes

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10
Q

are electric field lines closed

A

no

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11
Q

whats eddy current??

A
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12
Q

Flux formula wrt L(inductance) and with current/time

A
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13
Q

coeff of inductance depends on

A
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14
Q

coeff of inductance for a circular coil

A
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15
Q

Energy of inductor formula

A
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16
Q

Energy by unit volume of inductor (E/V)

A

1/2 uknot * B^2

17
Q

L formula for a solenoid

A

n—> number of turns/total lentgh

V—. volume enclosed by the solenoid

18
Q

Mutual induction formula

A
19
Q

Mutual induction constant is same / different for 2 coils for each other

A

same

20
Q

Steps to find Mutual inductance:-

A

(a) consider current in which loop: big
(b) calculate Flux of which loop: small
(c) apply it to the flux= M.i formula to get M

21
Q

Mutual induction formula of two co axial solenoids

A
22
Q

mutual induction consant depends

A
23
Q

Magnetic Force formula with BqV and vector form

A
24
Q

Transformer works on concept ofStep up and step down difference

A

mutual induction

25
Q

Step up and step down difference

A
26
Q

does frequecy changes in transformer

A

Nopes it remains

27
Q

V1,V2,N1,N2,I1,I2 relation(transformer)

A
28
Q

effecience formula for a transformer

A
29
Q

Inductor current decay formula, whats time constant! What the e^ stuff

A
30
Q

Inductor current decay graph

A
31
Q

time constant formula

A

τ = L/R

32
Q

Inductor current growth formula, whats time constant! What the e^ stuff

A
33
Q

Inductor current growth graph

A
34
Q

what does inductor turns at t=0 and t=inf

A
35
Q

how to find the positive terminal of the emf induced in a wire

A

Magnetics (3 decks)

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