Topic - Electricity

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Anisha Banerjee

Q. What is an electron volt? ... 4 Like

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2 answers under Electricity 1 year, 11 months ago

A. A unit of energy equal to the work done on an electron in moving it through a potential difference of 1 volt. Its used to measure particle energies although it not an SI unit. 1 eV = 1.602*10^-19... link
1 year, 11 months ago

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Anisha Banerjee

Q. If 18.75 * 10^18 electrons flow through a conductor in 3 seconds, what is the total charge that flows through the conductor? ... 3 Like

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1 answer under Electricity 1 year, 11 months ago

A. The total charge flowing through the conductor is n*e(n = no. of electrons; e = charge on 1 electron) Therefore, charge flowing(q) = 3.00375 C The current, however is = q/t = 1.00125 A(here t=... link
1 year, 11 months ago

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Anisha Banerjee

Q.

You are given three bulbs of 25, 40 and 60 watt all operating at 220 V. which out of the three has the lowest resistance?

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1 answer under Electricity 1 year, 11 months ago

A. This needs quite a bit of calculation actually! all operating at same voltage, hence putting in W = V^2/R you can find the resistance in each case and compare. However, there is an easier way... link
1 year, 11 months ago

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siddharth mishra

Q. the resistance of a metal wire of length 1 metre is 26 ohm at 20 degree celsius if the diameter of the wire 0.3mm ... 2 Like

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3 answers under Electricity 2 years ago

A. we know from the extension of Ohm's law: R = ρl/A [R= 26Ω; l = 1m; diameter = 0.3mm, hence radius = 0.15mm, or, 0.15*10^(-3)m] putting this value in the relation, and finding out the value... link
2 years ago

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