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Graph showing the variation of current versus voltage for a material GaAs is shown in the figure .Identify the region, where Ohm’s law is obeyed.

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Ohm’s law in point form in field theory can be expressed

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The variation between `V -i` for heating filament is shown by which

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The resistance of a wire is R ohm. If it is melted and stretched to `n` times its original length, its new resistance will

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If an ammeter in the given circuit shown in the diagram reads `2A`, the resistance `R`

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At room temperature `(27.0°C)` the resistance of a heating element is `100 Omega`. What is the temperature of the element, if the resistance is found to be `117 Omega`, given that the temperature coefficient of the material of the resistor is `1.70 xx

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The temperature `(T)` dependence of resistivity `(rho)` of a semiconductor is represented

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The temperature coefficient of resistance of an alloy used for making resistors

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The electrical conductivity of the metal decreases with temperature,

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Electric field and current density have

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Two bulbs of `40W and 60W` are connected to `220V` line, the ratio of resistance will

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The heat produced by 100W heater in 2 min is equal

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Current through the `5 Omega` resistor

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A battery of emf E has an internal resistance r. A variable resistance R is connected to the terminals of the battery. A current `i` is drawn from the battery. V is the terminal potential difference. If R alone is gradually reduced to zero, which of the following best describes `i and

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A cell of emf (E) and internal resistance r is connected across a variable external resistance R . The graph of terminal potential difference V as a function of R

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In the electric circuit shown, each cell has an emf of `2 V` and internal resistance is `1Omega` . The external resistance is `2Omega`. The value of the current `I` is (in

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Consider first two cells in series as shown in figure. The potential difference between the terminals A and C of the combination

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In the circuit shown in figure, `E_1=10V, E_2=4 V , r_1 = r_2 = 1Omega and R = 2Omega` Find the potential difference across battery 1 and battery

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Under what conditions current passing through the resistance R can be increased by short circuiting the battery of emf `E_2` ? The internal resistances of the two batteries are `r_1 and r_2`,

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12 cells, each of emf `1.5 V` and internal resistance of `0.5 Omega`, are arranged in `m` rows each containing `n` cells connected in series, as shown in the figure.Calculate the values of `n and m` for which this combination would send maximum current through an external resistance of `1.5

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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