The function of a choke in a fluorescent lamp is - Networks Analysis and Synthesis

Electronics and Communication Engineering (ECE) : Networks Analysis and Synthesis - Quiz(MCQ)

The function of a choke in a fluorescent lamp is

at the time of starting only

during the working of time but not at starting time

both at the time of starting and during working

None of the above

Correct Answer : Option (C) : both at the time of starting and during working

Explanation : At the time of starting the choke provides a high voltage. During working there is voltage drop across choke so that lamp gets proper voltage.

Recently Updated in Networks Analysis and Synthesis Questions

Ohm's law is valid for

dc voltage and current

ac voltage and current

dc and ac voltages and currents

all voltages and current

Correct Answer : all voltages and current

Explanation : KCL and KVL are valid for voltages and currents of all wave shapes during transient as well as steady state conductions.

If e = 110 sin (ωt + p/3) and i = 5 sin (ωt - p/3), the impedance of the circuit is

11 Ω

16 Ω

22 Ω

30.8 Ω

Correct Answer : 22 Ω

Explaination :

Two phasors having rms values V₁ and V₂ which are added to give a phasor having rms value V₃. V₃ is maximum if phase angle between V₁ and V₂ is

90°

180°

270°

360°

Correct Answer :

360°

Explaination : Sum of phasors is maximum if they are in phase and 360° = 0.

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