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
What does an electric circuit mean?
A Radio Set Draws a Current of 0.36 a for 15 Minutes. Calculate the Amount of Electric Charge that Flows Through the Circuit.
V1, V2 and V3 are the p.ds. across the 1Ω, 2Ω and 3Ω resistors in the following diagram, and the current is 5 A.
Which one of the columns (a) to (d) shows the correct values of V1, V2 and V3measured in volts?
`V_1` `V_2` `V_3`
(a) 1.0 2.0 3.0
(b) 5.0 10.0 15.0
(c) 5.0 2.5 1.6
(d) 4.0 4.0 2.0
Two resistors of 4 Ω and 6 Ω are connected in parallel. The combination is
connected across a 6 volt battery of negligible resistance. Calculate:
( i) The power supplied by the battery,
(ii) The power dissipated in each resistor.
Fig . shows the core of a transformer and i ts input and output connections
State the material used for the core and describe th e structure of the core.
(a) Use the values given in the diagram to calculate the turns ratio for the transformer and connections, labeling all parts of the diagram .
(b) If a current of 2 A is taken from th e output, calculate th e current in the input circuit (Assume the transformer to be ideal ).
An electric bulb is rated at 220 V, 100 W.
- What is its resistance?
- What safe current can be passed through it?
In current electricity, a positive charge refers to ______.
Match the following:
| 1. | 1 mA | a. | series |
| 2. | 1 pA | b. | ohmmeter |
| 3. | Ammeter | c. | 10-6 ampere |
| 4. | Electrical resistivity | d. | 10-3 ampere |
What is the SI unit for the current?
The magnitude of Alternating Current (AC):
