Answer the following questions: Why is choke coil needed in the use of fluorescent tubes with ac mains? Why can we not use an ordinary resistor instead of the choke coil?

What is the fucntion of a choke coil in fluorescent tube?

Why choke coil cannot be used in d.c.?

Answer the following questions: A choke coil in series with a lamp is connected to a dc line. The lamp is seen to shine brightly. Insertion of an iron core in the choke causes no change in the lamp’s brightness. Predict the corresponding observations if the connection is to an ac line.

Answer the following questions: A capacitor is used in the primary circuit of an induction coil.

Answer the following question: It is necessary to use satellites for long distance TV transmission. Why?

Answer the following question: Long distance radio broadcasts use short-wave bands. Why?