Advertisements
Advertisements
प्रश्न
Name the principle on which a transformer works.
Advertisements
उत्तर
A transformer works on the principle of electromagnetic induction.
APPEARS IN
संबंधित प्रश्न
In which direction does conventional current flow around a circuit?
Why should the resistance of:
an ammeter be very small?
A car headlight bulb working on a 12 V car battery draws a current of 0.5 A. The resistance of the light bulb is:
Complete the following sentence:
A fuse is connected in ........... with the ......... wire.
Two cells each having an e.m.f. of 2 V and an internal resistance of 2Ω are
connected (a) In series, and ( b) In para 1le l as shown in fig. . What is the
current flowing through the cir cu it in each_ case?
If a fuse contains a 5 A fuse wire and the voltage is 240 V, what is the maximum power (wattage) which may be taken from the circuit?
A wire is passed through a piece of cardboard as shown in fig .. An electric current flows vertically down the wire and then flows back up. The two sections of the write are observed to repel each other.
(a) Wi th the aid of a diagram, describe how you would plot the magnetic field lines on the card .
(b) Sketch the magnetic field patterns around both the sections of the wire. Use your sketch to explain why the two sections repel each other.
(c) The repulsive force between the two sections is small. What changes could be made to increase it?
Electric current passes through a metallic conductor due to the movement of ______.
