A battery is connected to a uniform resi...

A battery is connected to a uniform resistance wire AB and B is earthed. Which one of the graphs below shows how the current density J varies along AB

Text Solution

Verified by Experts

The correct Answer is:

For uniform wire, current density is uniform

Topper's Solved these Questions

CURRENT ELECTRICITY
ERRORLESS|Exercise NCERT BASED QUESTIONS (Grouping of Resistances)|69 Videos
CURRENT ELECTRICITY
ERRORLESS|Exercise NCERT BASED QUESTIONS (KIRCHHOFF.S LAW, CELLS)|53 Videos
ATOMIC AND NUCLEAR PHYSICS
ERRORLESS|Exercise Assertion and Reason|23 Videos
ELECTROMAGNETIC INDUCTION
ERRORLESS|Exercise ASSERTION & REASON|20 Videos

Similar Questions

Explore conceptually related problems

A battery consists of a varialbe number n of identical cells having internal resistance connected in series. The terminals of the battery are short circuited and the current I measured. Which one of the graph below shows the correct relationship between I and n ?

is made of uniform material and cross-sectional area, and it has uniform resistance per unit length. The potential gradient depends upon the current in the wire. A potentiometer with a cell of emf 2 V and internal resistance 0.4 Omega is used across the wire AB . A standard cadmium cell of emf 1.02 V gives a balance point at 66 cm length of wire. The standard cell is then replaced by a cell of unknows emf e (internal resistance r ), and the balance. Point found similarly turns out to be 88 cm length of the wire. The length of potentiometer wire AB is 1 m . If the resistance is connected across the cell e , the balancing length will

is made of uniform material and cross-sectional area, and it has uniform resistance per unit length. The potential gradient depends upon the current in the wire. A potentiometer with a cell of emf 2 V and internal resistance 0.4 Omega is used across the wire AB . A standard cadmium cell of emf 1.02 V gives a balance point at 66 cm length of wire. The standard cell is then replaced by a cell of unknows emf e (internal resistance r ), and the balance. Point found similarly turns out to be 88 cm length of the wire. The length of potentiometer wire AB is 1 m . The reading of the potentiometer, if a 4V battery is used instead of e is

A electric current passes through non uniform cross-section wire made of homogeneous and isotropic meterial. If the j_(A) and J_(B) be the current densities and E_(A) and E_(B) be the electric field intensities at A and B respectively, then

AB and CD are two uniform resistance wires of lengths 100 cm and 80 cm respectively. The connections are shown in the figure. The cell of emf 5 V is ideal while the other cell of E has internal resistance 2 Omega . A length of 20 cm of wire CD is balanced by 40 cm of wire AB . Find the emf E in volt, if the reading of the ideal ammeter is 2 A . The other connecting wires have negligible resistance

A 2V battery is connected across AB as shown in the figure. The value of the current supplied by the battery when in one case battery's positive terminal is connected to A and in other case when positive terminal of battery is connected to B will respectively be :-

A 6 volt battery of negligible internal resistance is connected across a uniform wire AB of length 100 cm . The positive terminal of another battery of emf 4V and internal resistance 1 Omega is joind to the point A as shown in figure. Take the potential at B to be zero. (a) What are the potentials at the points A and C ? (b) At which D of the wire AB, the potential is equal to the potential at C. ( c) If the point C and D are connected by a wire. What will be the current through is ? (d) Id the 4V batteryt is replaced by 7.5 V battery, what whould be the answers of parts (a) and (b) ?

ERRORLESS-CURRENT ELECTRICITY-ASSERTION AND REASON

A battery is connected to a uniform resistance wire AB and B is eart...
Text Solution
|
Assertion : A person touching a high power line gas stuck with the lin...
Text Solution
|
Assertion : In a simple battery circuit the point of lowest potential ...
Text Solution
|
Statement-1 : The temperature coefficient of resistance is positive fo...
Text Solution
|
Assetion : In the following circuit emf is 2 V and internal resistance...
Text Solution
|
Assertion : There is no current in the metals in the absence of electr...
Text Solution
|
Assertion : Electric appliances with metallic body, e.g. heaters, pres...
Text Solution
|
Assertion : The drift velocity of electrons in a metallic wire will de...
Text Solution
|
Assertion : The electric bulbs glows immediately when switch is on. ...
Text Solution
|
Assertion : Bending a wire does not effect electrical resistance. Re...
Text Solution
|
Assertion : In meter bridge experiment, a high resistance is always co...
Text Solution
|
Statement -1 : Voltameter measures current more accurately than ammete...
Text Solution
|
Assertion : The e.m.f. of the drivercell in the potentiometer experime...
Text Solution
|
Assertion : The resistance of super-conductor is zero. Reason : T...
Text Solution
|
Assertion : A potentiometer of longer length is used of accurate measu...
Text Solution
|
Assertion: The possibility of an electric bulb fusing is higher at the...
Text Solution
|
Assertion : Fuse wire must have high resistance and low melting point....
Text Solution
|
Assertion : Two electric bulbs of 50 and 100 W are given. When connect...
Text Solution
|
Assertion : Two bulbs of same wattage, one having a carbon filament an...
Text Solution
|
Assertion : An electric bulb is first connected to a dc source and t...
Text Solution
|
Assertion : An electric bulb becomes dim, when an electric heater in p...
Text Solution
|