EMF vokatry ny induction elektromagnetika - Olana sy vahaolana

3 Fampidirana elektromagnetika EMF vokatry ny olan'ny olana sy ny vahaolana

1. Boil iray nosoloina boil hafa izay manana tadivavarana in-2 noho ny tadivavarana voalohany ary tsy miova ny tahan'ny fiovan'ny flux magnetika. Fantaro ny tahan'ny emf nateraka voalohany sy farany.

Fantatra:

Tadivavarana voalohany (N) = 1

Tadivavarana farany (N) = 2

Ny tahan'ny fiovan'ny fikorianan'ny andriamby voalohany (ΔØ_B / Δt) = ny tahan'ny fiovan'ny fikorianan'ny andriamby farany (ΔØ_B /Δt)

Mitady: The ratio of initial and final induced emf

vahaolana:

The equation of Faraday’s law of induction :

E = -N (ΔØ_B /Δt)

E = induced EMF, N = number of loops, ΔØ_B / Δt = the rate of change of magnetic flux

The ratio of initial and final induced emf :

E initial: E final

-N (ΔØ_B / Δt) : -N (ΔØ_B /Δt)

1: 2

2. In the initial state (1), the magnetic flux is changed by 5 Wb in 2 seconds on a coil with 20 loops. In the final state (2), the same flux changed in 8 seconds. Determine the ratio of the initially induced emf and the final induced emf.

Fantatra:

Ny tahan'ny fiovan'ny fikorianan'ny andriamby voalohany (ΔØ_B / Δt) = 5/2

The rate of change of final magnetic flux (ΔØ_B / Δt) = 5/8

Number of loops (N) = 20

Mitady: The ratio of the initially induced emf and the final induced emf

vahaolana:

E initial: E final

-N (ΔØ_B / Δt) : -N (ΔØ_B /Δt)

20 (5/2) : 20 (5/8)

5/2: 5/8

1/1: 1/4

4: 1

3. The magnetic flux of the initial coil has 200 loops changes by 0.06 Wb in 0.4 seconds. The magnetic flux of the final coil has 0.08 Wb in 0.2 seconds. If several loops of the final coils are substituted with the half number of the first coil’s loops, determine the ratio of the induced emf of the initial loops and the final loops.

Fantatra:

Ny tahan'ny fiovan'ny fikorianan'ny andriamby voalohany (ΔØ_B / Δt) = 0.06 / 0.4

Number of initial loops (N) = 200

The rate of change of final magnetic flux (ΔØ_B / Δt) = 0.08 / 0.2

Number of final loops (N) = 100

Tadiavina: The ratio of the initial induced emf and the final induced emf

vahaolana:

E initial : E final

-N (ΔØ_B / Δt) : -N (ΔØ_B /Δt)

200 (0.06/0.4) : 100 (0.08/0.2)

2 (0.15) : 1 (0.4)

0.3: 0.4

3: 4