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 $AB$
Medium
Download our app for free and get started
(d) Wire $AB$ is uniform so current through wire $AB$ at every across section will be same. Hence current density $J\left( { = i/A} \right)$ at every point of the wire will be same.
Download our appand get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
Similar Questions
- 1If two bulbs of wattage $25$ and $30$, each rated at $220\, volts$, are connected in series with a $440$ $volt$ supply, which bulb will fuseView Solution
- 2View SolutionIn the given circuit, the terminal potential difference of the cell is:
- 3The electric current through a wire varies with time as $I=I_0+\beta t$. where $I_0=20 \mathrm{~A}$ and $\beta=3 \mathrm{~A} / \mathrm{s}$. The amount of electric charge crossed through a section of the wire in $20 \mathrm{~s}$ is :View Solution
- 4View SolutionA constant voltage is applied between the two ends of a uniform metallic wire. Some heat is developed in it. The heat developed is double if
- 5Three resistors of $4\,\Omega ,6\,\Omega $ and $12\,\Omega $ are connected in parallel and the combination is connected in series with a $1.5\, V$ battery of $1\,\Omega $ internal resistance. The rate of Joule heating in the $4\,\Omega $ resistor is ................ $W$View Solution
- 6The length of a wire of a potentiometer is $100\, cm$, and the $emf$ of its standard cell is $E\,volt$. It is employed to measure the $e.m.f$ of a battery whose internal resistance is $0.5 \,\Omega$. If the balance point is obtained at $l = 30\, cm$ from the positive end, the $e.m.f.$ of the battery isView Solution
where $i$ is the current in the potentiometer
- 7In an experiment, a graph was plotted of the potential difference $V$ between the terminals of a cell against the circuit current $i$ by varying load rheostat. Internal conductance of the cell is given byView Solution
- 8A current of $2\, A$ flows in a system of conductors as shown. The potential difference $(V_A -V_B)$ will be ................ $\mathrm{V}$View Solution
- 9Two solid conductors are made up of same material, have same length and same resistance. One of them has a circular cross section of area $A_{1}$ and the other one has a square cross section of area $A_{2}$. The ratio $\frac{A _{1}}{A _{2}}$ isView Solution
- 10The resistivity $(\rho)$ of semiconductor varies with temperature. Which of the following curve represents the correct behaviourView Solution