Advertisements
Advertisements
Question
- What kind of energy change takes place when a magnet is moved towards a coil having a galvanometer at its ends?
- Name the phenomenon.
Advertisements
Solution
- Mechanical energy changes to electrical energy.
- Electromagnetic induction is a phenomenon.
APPEARS IN
RELATED QUESTIONS
The device used for producing electric current is called _________.
A metal rod `1/sqrtpi `m long rotates about one of its ends perpendicular to a plane whose magnetic induction is 4 x 10-3 T. Calculate the number of revolutions made by the rod per second if the e.m.f. induced between the ends of the rod is 16 mV.
The diagram 10 shows two coils X and Y. The coil X is connected to a battery S and a key K. The coil Y is connected to a galvanometer G.
When the key K is closed. State the polarity
(i)At the end of the coil X,
(ii)At the end C of the coil Y,
(iii)At the end C of the coil Y if the coil Y is (a) Moved towards the coil X, (b) Moved away from the coil X.
Answer the following:
State the principles of the electric motor and electric generator.
List two ways of increasing the strength of an electromagnet if the material of the electromagnet is fixed.
The right-hand thumb rule is also called _______ rule.
The magnetic flux passing through a coil perpendicular to its plane is a function of time and is given by OB = (2t3 + 4t2 + 8t + 8) Wb. If the resistance of the coil is 5 Ω, determine the induced current through the coil at a time t = 3 second.
Name some equipment that uses electromagnetism for functioning.
For making a strong electromagnet the material of the core should be ______.
Which of the following phenomena makes use of electromagnetic induction?
