Current density is given by current per unit area.
So as area decreases current density increases.
Thus using above going from A to B current density increases.
Thus 1st option is correct.
QUESTION 7 A current-carrying ohmic metal wire has a cross-sectional area that gradually becomes smaller from...
QUESTION A current-carrying metal wire has a cross sectional area that gradually becomes aller from one end of the wire to the other and on A current is passing through the wire. How does the speed wary long the wires the area becomes smaller from and to end ī O remains constant O w increases O Not enough information O wydecreases
If a current-carrying wire has a cross-sectional area that gradually becomes smaller along the length of the wire, the drift velocity: a. increases along the length of the wire if the resistance increases too b. decreases along the length of the wire if the resistance decreases too c. decreases along the length of the wire d. increases along the length of the wire e. remains the same along the length of the wire
2. A copper wire carrying a current of 5.00 A has a cross-sectional area of 5.00 x 106 m2. Find the drift speed of the electrons in the wire. The density of copper is 8.96 g/cm3. (Assume that each copper atom supplies one free electron.)
A current-carrying conductor made of aluminum gradually narrows as shown in the figure below. The cross-sectional area of region 1 is twice that of region 2. In region 1, the current is 7.55 mA and the current density is 3.80 kA/m^2. Find the drift speed in both regions of the conductor. Region 1 Your response differs from the correct answer by more than 10%. Double check your calculations, m/s Region 2 m/s
1. As a stream of water flows, the cross-sectional area of the stream becomes smaller. If it initially moves with a speed of 1.8 m/s and then the cross-sectional area decreases to one-fourth of the original area, what is the water speed in this narrowed part of the stream?____ m/s 2. (As water falls, its speed increases, due to the acceleration of gravity. If you make a steady stream of water flow from a faucet, you will see that the...
A wire has a current density of 7.43 Times 10^6 A/m^2. If the cross-sectional area of the wire is 1.99 mm^2, current does the wire carry? With this current, how much time is required for 5.87 Times 10^20 electrons to pass any point on the wire?
A 10.0 cm length of copper wire has a uniform cross-sectional area of 1.0 mm2. If the drift speed of electrons in the wire is: 2.0x10-4 m/s and the electrons all move directly along the wire, what is the magnitude of the current density? What is the total current carried by the wire.
An aluminum wire has a mobile charge density is 8.0e28 electrons/m3, and a cross-sectional area of 2.3e-6 m2. When a current flows through the wire, the average drift speed of the electrons is 1.7e-4 m/s. What is the current in the wire?
Chapter 30, Problem 067 A solenoid that is 79.3 cm long has a cross-sectional area of 25.3 cm2. There are 807 turns of wire carrying a current of 6.47 A. (a) Calculate the energy density of the magnetic field inside the solenoid. (b) Find the total energy in joules stored in the magnetic field there (neglect end effects). (a) Number Units (b) Number Units
A copper wire of cross-sectional area of 8.2x10^-7 m^2 has a resistance of 1.11 Ω. a). How long is the wire? b). If a potential of 12.0 V is applied across the ends of the wire, what current will flow through the wire? c). How much electrical power is supplied to the spool? d). How many electrons (N) pass through this wire in 1.00 minutes?