0
Advantage of a choke coil over a resistor in a power supply filter?
Wiki User
∙ 14y ago
A choke is an inductor. For typical power frequency, an inductor will slightly change the power factor, but will not actively use much energy. An abnormal voltage spike on a power supply is equivalent to voltage at a much higher frequency. Inductors appear to be a much greater impedance to high frequencies. This allows the choke to pass "normal" power, while at the same time it blocks "abnormal" power.
A resistor acts independent of frequency. It will limit the effects of the high frequency voltage spikes by dissipating their energy, but it will do the same for the normal power system frequency. In effect, it is always using power, when the choke only uses what you don't want to get to the power supply.
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
What is a choke in electric panel?
It could be to filter out outside interference from getting out or in. Radio equipment needs good filtering in the supply.
Why choke used in dc drives?
choke is used before drives to reduce the source supply fluctuation problem , which will effect drives
Is tube light run without choke?
No it will not. If you need increase the supply voltage and remove the choke.
What is use of RFC in Hartley oscillator?
it is a radio frequency choke which connects the dc supply to the circuit but isolate the dc supply from the high frequency oscillations generated in the feedback circuit
What is electric choke?
The choke enriches the mixture for start-up and then is heated by a small electrical heating coil so the choke goes off when the engine is at operating temperature.
Why are you using bleeder resistor in LC filter?
In LC filter , Bleeder resistance is connected in Parallel with the load to maintain the minimum current through the choke and so the performance of the Filter improves.
What is a choke in electric panel?
It could be to filter out outside interference from getting out or in. Radio equipment needs good filtering in the supply.
Can choke replaced by a resistor in fluorescent lamp circuit?
fluorescent lamp work on the principle of ionizing the gas , which requires very high potential difference . this excess voltage is provided by the choke coil . when the starter breaks the circuit , current suddenly drops , thus to maintain the current the choke coil a very high voltage is supplied by the choke coil . this very high voltage cannot be obtained from a resistor or a rheostat , since it being a linear element , thus it cannot be a replacement for choke.
Why choke used in dc drives?
choke is used before drives to reduce the source supply fluctuation problem , which will effect drives
Is tube light run without choke?
No it will not. If you need increase the supply voltage and remove the choke.
Were is the choke?
On the intake of the carburettor where the air ram pipe / air filter fits.
Weedeater only runs when you keep moving throttle from full choke to half choke?
Clean and adjust the carburetor. Also clean the air filter.
Why cant freshwater plants live in saltwater?
they aren't able to filter out the salt, so they choke on it.
How we check phase sequence of three phase supply with help of two bulbs and a choke?
i don know
Why does lawnmower quit when the choke is off?
it is starving for gas,could be as simple as a fuel filter,check air filter to see if its clean. if need be adjust carburater!!
What do you do when you have spark and your engine will turn over only when in choke but dies as soon as the gas runs through on a Briggs and stratton 20hp lawn motor?
When you say the engine will turn over only when in choke, I assume you mean it runs while chokedand then dies when you let off the choke. Check the fuel filter,the air filter,makecarburetor adjustments if necessary and ultimately, checkthe throttle linkage.
How do you change the air filter on a Murray 22' lawnmower?
There is a screw on the top above the choke (Push button 3 times). Un-screw this, and inside is the air filter.
