Current Electricity and Electrical InstrumentHard
Question
The drift velocity of electrons in a conducting wire is of the order of 1mm/s, yet the bulb glows very quickly after the switch is put on because
Options
A.The random speed of electrons is very high, of the order of 106 m/s
B.The electrons transfer their energy very quickly through collisions
C.Electric field is set up in the wire very quickly, producing a current through each cross section, almost instantaneously
D.All of above
Solution
The drift velocity of electrons in a conducting wire is of the order of 1mm/s. But electric field is set up in the wire very quickly, producing a current through each cross section, almost instantaneously.
Create a free account to view solution
View Solution FreeTopic: Current Electricity and Electrical Instrument·Practice all Current Electricity and Electrical Instrument questions
More Current Electricity and Electrical Instrument Questions
A 100 V, 50 Hz A.C. supply is connected to a series L-R circuit. The current in the circuit is 5A and the average power ...Four resistances are connected in a circuit as shown in the following diagram.The value of the current in ampere in 4 oh...At time t = 0, terminal A in the circuit shown in the figure is connected to B by a key and an alternating current I(t) ...In the following circuit the resultant e.m.f. between AB is :-...For the resistance network shown in the figure, choose the correct option(s)...