Engineering Studio

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“Peace cannot be kept by force; it can only be achieved by understanding.” “Darkness cannot drive out darkness; only light can do that. Hate cannot drive out hate; only love can do that.”
~ Martin Luther King, Jr.

"A good friend is like a four-leaf clover, hard to find and lucky to have."
- Irish Proverb

https://www.youtube.com/watch?v=rs4lJWlWsR0

Amazing Science - What does an Electrical Engineer do? What's it really like to be an engineer or a scientist? What do they really do all day? You're about to find out! Meet the next generation of engineers and s...

Engineers and the team are working on a project in Sienkee Garments. Part of today's activities on the working site...

Q: What happen if we give 220 volts dc supply to bulb or tube light?

A: Bulbs or 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.

Q: Two bulbs of 100w and 40w respectively connected in series across a 230v supply which bulb will glow bright and why?

A: Since two bulbs are in series they will get equal amount of electrical current but as the supply voltage is constant across the Bulb (P=V^2/R).So the resistance of 40W bulb is greater and voltage across 40W is more (V=IR) so 40W bulb will glow brighter.

 Earth Resistance is the resistance existing between the electrically accessible part of a buried electrode and another point of the earth, which is far away.
 The resistance of the electrode has the following components:
(A) the resistance of the metal and that of the connection to it.
(B) The contact resistance of the surrounding earth to the electrode.

Eid Mubarak!