A constant current of 2.8A exists in a resistor. The rms current …

statement$-1$ : The temperature dependence of resistance is usually given as $R=R_{0}(1+\alpha \Delta t)$. The resistance of a wire changes from $100\; \Omega$ to $150\; \Omega$ when its temperature is increased from $27^{\circ} C$ to $227^{\circ} C$. This implies that $\alpha=2.5$ $\times 10^{-3} /{ }^{\circ} C$

statement$-2\;: R=R_{0}(1+\alpha \Delta t)$ is valid only when the change in the temperature $\Delta T$ is small and $\Delta R=\left(R-R_{0}\right) < < R_{0}$

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In a $CE$ transistor amplifier, the audio signal voltage across the collector resistance of $2\,\, k\Omega$ is $2\, V.$ If the base resistance is $1 \,\,k\Omega$ and the current amplification of the transistor is $100,$ the input signal voltage is

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There are three resistance coils of equal resistance. The maximum number of resistances you can obtain by connecting them in any manner you choose, being free to use any number of the coils in any way is

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A charge $q$ is released in presence of electric $(E)$ and magnetic field $(B)$ then after some time its velocity is $v$ then

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Fermi level of energy of an intrinsic semiconductor lies

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If ${N_0}$ is the original mass of the substance of half life period ${T_{1/2}} = 5$ years, then the amount of substance left after $15$ years is

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A circular coil of conducting wire has an area $A$ and number of turns $N$. It is lying in a vertical plane in a region where uniform magnetic field $B$ exist with field direction normal to the coil plane. If the coil is rotated about a vertical axis by an angle $π$ in $0.5$ seconds, then the value of the emf induced at the ends of the coil is.