what is the function of starter & choke in the tube light
set & how choke give 1000 volts while switching on.
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Answer Posted / soumitra debnath
When the switch is pressed current cannot pass through the tube initially because the gas inside it is not ionized and hence the tube light circuit behaves as open circuit. Once the gas is ionized, it will provide a conduction path for the current to flow. In order to ionize the gas, an initial high voltage of 800-1000 V is required for a short period across the filaments of the main tube. A starter initially provides a path to complete the circuit and once tube light starts the current flows through the ionized gas in the main tube.
Now we know that voltage across inductor E=L*di/dt.when ac switches from positive half cycle to negetive half cycle,magnetic flux changes its direction as well as magnitude and according to farady's law it will produce a large voltage accross inductor and so across the electrode and producing a voltage strike of 800 to 1000v and thus heats up(ionise) the gas.
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