Ohm's law

A child has drawn the electric circuit to study Ohm's law as shown in (Fig. 3.42). His teacher told him that the circuit diagram needs correction. Study the circuit diagram and redraw it after making all corrections. .

The relaxation time tau is nearly independent of applied electric field E whereas it changes significiantly with temperature T . First fact is (in part) responsible for Ohm's law whereas the second fact leads to variation of p with temperature. Elaborate why ?

The relaxation time tau is nearly independent of applied electric field E whereas it changes significiantly with temperature T . First fact is (in part) responsible for Ohm's law whereas the second fact leads to variation of p with temperature. Elaborate why ?

Draw the circuit for experimental verification of Ohm's law using a source of variable DC voltage, a main resistance of 100 Omega , two galvanometers and two resistances of value 10^6 Omega and 10^-3Omega respectively. Clearly show the positions of the voltmeter and the ammeter.

Draw the circuit for experimental verfication of Ohm's law using a source of variable DC voltage, a main resistance of 100 (Omega) , two galvanometers and two resistances of values 10^(6) Omega and 10^-3 respectively. Clearly show the positions of the voltmeter and the ammeter.

Choose the word or phrase that is most closely associated with the given word. You may use a choice more than once or not at all. Eliminate those choices that you think to be incorrect and mark the letter of your choice on the answer sheet (1)Graham's law of diffusion (2)Charles's law (3)Ohm's law (4) Gresham's law I=E/R

Consider a block of conducting material of resistivity 'rho' shown in the figure. Current 'I' enters at 'A' and leaves from 'D'. We apply superposition principle to find voltage DeltaV developed between 'B' and 'C'. The calculation is done in the following steps: (i) Take current 'I' entering from 'A' and assume it to spread over a hemispherical surface in the block. (ii) Calculate field E(r) at distance 'r' from A by using Ohm's law E = rhoj, where j is the current per unit area at 'r'. (iii) From the 'r' dependence of E(r), obtain the potential V(r) at r. (iv) Repeat (i), (ii) and (iii) for current 'I' leaving 'D' and superpose results for 'A' and 'D'. Delta V measured between B and C is

State Ohm' law and deduce it from the knowledge of drift velocity of free electrons in a conductor carrying current.

State ohm's law. In the circuit shown in figure, a voltmeter reads 30 volts when it is connected across 400 ohm resistance. Calculate what the same voltmeter will read when it is connected across the 300 ohm resistance.

In the experiment of Ohm's law, when potential difference of 10.0 V is applied, current measured is 1.00 A. If length of wire is found to be 10.0cm and diameter of wire 2.50 mm, then find maximum permissible percentage error in resistivity.