Advertisements
Advertisements
प्रश्न
Advertisements
उत्तर
Given , Np = 800 , Ns = 8,Ep = 220V, Es=?
We know that for a step-down transformer,
`"N"_"s"/"N"_"p" = "E"_"s"/"E"_"p"`
`"E"_"s" = "N"_"s"/"N"_"p" xx "E"_"p" = 8/800 xx 220 = 2.2 "V"`
APPEARS IN
संबंधित प्रश्न
Draw the electrical symbols of the following components and state its use:
Rheostat (variable resistance)
A flash of lighting carries 10 C of charge which flows for 0.01 s. What is the current? If the voltage is 10 MV, what is the energy?
Draw a schematic diagram of an electric circuit consisting of a battery of two cells each of 1.5 V, 5 Ω, 10 Ω and 15 Ω resistors and a plug key, all connected in series.
Answer the following question.
An electric lamp of resistance 20 Ω and a conductor of resistance 4 0 are connected to a 6 V battery as shown in the circuit. Calculate: 
(a) the total resistance of the circuit,
(b) the current through the circuit,
(c) the potential difference across the (i) electric lamp and (ii) conductor, and
(d) power of the lamp.
State the condition when it is advantageous to connect cells in series.
State the condition when it is advantageous to connect cells in parallel.
A current of 2A passing through the conductor produces 80 J of heat in 10 seconds. The resistance of the conductor is ______.
The number of electrons constituting a 1-coulomb charge is ______.
