Advertisements
Advertisements
प्रश्न
How is the e.m.f. across primary and secondary coils of a transformer related with the number of turns of the coil in them?
Advertisements
उत्तर
`E_S/E_P = N_S/N_P`
Here e.m.f. is directly propotional to number of turns.
APPEARS IN
संबंधित प्रश्न
Explain the significance of Lenz’s law to show the conservation of energy in electromagnetic induction.
Why is the iron core of a transformer made laminated (thin sheets) instead of being in one solid piece?
The primary of a transformer has 40 turns and works on 100 V and 100 W. Find a number of turns in the secondary to step up the voltage to 400 V. Also calculate the current in the secondary and primary.
Transformer works on ______.
Explain the working of the transformer.
A transformer is used ______
Magnetic flux Φ in weber in a closed circuit of resistance 10Ω varies with time Φ (sec) as Φ = 6t2 - 5t + 1. The magnitude of induced current at t = 0.25s is ______.
What type of transformer is used in a mobile phone charger?
A 12 V, 60 W lamp is connected to a 220 V AC supply using an ideal transformer. Find the primary current.
In an ideal transformer, the turns ratio is `N_p/N_s = 1/2`. The ratio Vs : Vp is equal to (the symbols carry their usual meaning):
