Current Electricity and Electrical InstrumentMedium
Question
A current passes through a wire of non-uniform cross-section. Which of the following quantities are independent of the cross-section?
Options
A.the charge crossing in a given time interval
B.drift speed
C.current density
D.free-electron density.
Solution
In series current remain same I = neAvd , J = I/A, for constant current vd ∝
and J ∝ .
and J ∝ . 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
If the length of a heater wire of 1000W, 220V is reduced by 20% then the power consumption will be...In the arrangement shown in figure when the switch S2 is open, the galvanometer chows no deflection for . When the switc...If i = 0.25 amp. in fig then value of R is : -...A new electric store house of 1.5 emf of a flash gives a current of 15A, when it is connected with an electric ammeter o...Maximum number of 60 W bulbs that can be used in a 220 V supply line protected by a 10 A fuse is...