Answer / gajendran.al

Bulbs [devices] for AC are designed to operate such that it
offers high impedance to AC supply. Normally they have low
resistance. When DC supply is applied, due to low
resistance, the current through lamp would be so high that
it may damage the bulb element.

Answer / usmanaslam271

If bulb's rated AC voltage is 220 volts then it will work
on 220 volts DC as well.

Answer / rajendran

if we give to the tube light that is FL lamp it will not
glow since since there is no ballast function...

if it is an 220 V incandescent lamp it will glow normally

Answer / prateek sharma

The bulb will glow just fine but in case of an Tubelight ,
it will light up initially, but due to loss of inductive
action towards the DC an excess current will flow in the
low resistance path f the tube so formed and will draw
excess current resulting in whatever it will lead to.

Answer / ayush verma

It may damage the bulb element

Answer / amir wagdarikar

As in tubelight there is a inductor so the property of
inductor is to oppose dc and pass only ac bcause this reason
the tubelight wont light

Answer / priya wani

It will depend upon the ac & dc resisitance of the bulb.

Answer / ranveer singh

nothing will happn only bulb will blast.

Answer / osayamwen osasere anthony

if u give a 220v dc to a bulb whose rating suppose to that
of 220v ac, i think the bulb wont glow unless a higher dc
source which as a higher voltage value more than 220v ac.

What difference between MCB,MCCB,RCCB,ELCB please explain briefly with its rating.

3 Answers  

Dear all i want to know FEWA Electrical Supervisor Licence test Previous Year Questions ? If any body know please send to me shibin_75@yahoo.com

1 Answers   FEWA,

If the generator will trip, what you will do as an electrical technician in charge.

1 Answers  

how to modify DOL control panel into Delta Y connection?

0 Answers   ABB, PDCS,

if the number of poles generated in stator and rotor side of an induction motor are different then what will happen and why?

0 Answers  

what is formula in determining the size of Circuit Breaker for transformer with the following specifications. 7 units of 1600 volts (primary) and 400 volts (secondary). Both Primary and Secondary will have a circuit breaker which is SF6. What should be the Switchgear Main Breaker Size anf the sizes of each brances Circuit Breaker for Primary.

1 Answers   ABB,

how capacitor can split the phase.

1 Answers  

how we have to calculate the short circuit current for 33/11kv 2mva, 7.5% Z, Transformer primary side breaker and secondary side breaker short circuit current for both sides?.

5 Answers  

how can service sitting be setted for MCCB?Example for sittings IR (CURRENT RATING),IS(CURRENT STARTING) I O (current operating)?

0 Answers  

What are dependent sources?

0 Answers  

A mass of 1200g is accelerated at 200 cm/s2by a force. The value of the force required is:(a) 2.4N(b) 2400N(c) 240 kN(d) 0.24N

0 Answers  

what is exact meaning of CT core saturation or simply saturation of core.

1 Answers