Q8 of 25 Page 13

What is the meaning of the term ‘frequency’ of an alternating current? What is its value in India? Why is an alternating current considered to be advantageous over direct current for long range transmission of electric energy?


More from this chapter

All 25 →
6

Why it necessary to connect an earth wire to electric appliances having metallic bodies? ( CBSE 2012)

 7 A compass needle is placed near a current carrying wire. State your observation for the following cases, and give reasons for the same in each case.
(a) The magnitude of electric current in the wire is increased
(b) The compass needle is displaced away from the wire. ( CBSE 2009) 9

A charged particle enters at right angle into an a uniform magnetic field as shown. What should be the nature of charge on te particle if ti begins to move in a diretion pointing vertically out of the page due to its interaction with magnetic field? ( CBSE 2009)

 10

What is a solenoid? Draw the pattern of magnetic field lines of solenoid