What is a Choke coil? Why is a Choke coil preferred over transformer in operation of the tube light?
Answers
Choke coil
In electronics, a choke is an inductor used to block higher-frequency while passing direct current (DC) and lower-frequencies of alternating current (AC) in an electrical circuit. ... The name comes from blocking—"choking"—high frequencies while passing low
use:
The low electrical resistance allows DC and AC to pass with little power loss but it can limit the amount of AC passing through it due to its reactance. The choke coil works because it can act as an inductor.
In a.c. circuits, a choke coil is used to control the current in place of a resistance. If a resistance is used to control the current, the electrical energy will be wasted in the form of heat. Due to its inductive reactance, a choke coil decreases the current without wasting electrical energy in the form of heat.
Answer:
Explanation:
What is a Choke coil?
ans:- A choke coil is an inductance coil of very small resistance used for controlling current in an a.c. circuit. If a resistance is used to control current, there is wastage of power due to Joule heating effect in the resistance. On the other hand there is no dissipation of power when a current flows through a pure inductor.
Why is a Choke coil preferred over transformer in operation of the tube light?
ans:- When the switch is ON, in a tube light choke is nothing but the coil/ballast ( inductor) which is used to induce the high voltage across it. ... Gas discharge process continues and current gets the path to flow through the tube light gas only due to low resistance as compared to the resistance of starter. The purpose of the choke is to provide a very high voltage initially between the filaments (across the two ends of the tube light). Again once the gas in the tube is ionized the choke provides a low voltage. A choke is a coil of wire. In a.c. circuits, a choke coil is used to control the current in place of a resistance. If a resistance is used to control the current, the electrical energy will be wasted in the form of heat. Due to its inductive reactance, a choke coil decreases the current without wasting electrical energy in the form of heat.
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