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The current in a wire varies with time according to the equation `i=4+ 2t`, where `i` is in ampere and `t` is in second. The quantity of charge which passes through a cross-section of the wire during the time `t= 2 s` to `t = 6 s`

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

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How many electrons pass through a lamp in 1 min, if the current is `300 mA`? Given, the charge on an electron is `1.6 xx 10^(-19)

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

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The plot represents the flow of current through a wire at three different timesThe ratio of charges flowing through the wire at different times

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Drift velocity `v_d` varies with the intensity of electric field as per the

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A metal wire is subjected to a constant potential difference. When the temperature of the metal wire increases, then the drift velocity of the electron in

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The drift velocity of the electrons in a copper wire of length 2 m under the application of a potential difference of `220 V` is `0.5 ms^(-1)`. Their mobility (in `m^2 V^(-1)

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

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If charges move without collisions through the conductor, their kinetic energy would also change, so that the total energy

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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`

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

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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

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

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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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