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Q JEE MAIN 2019
In the circuit shown, a four wire potentiometer is made of a 400 cm long wire, which extends between A and B . The resistance...
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Q JEE MAIN 2021
In the given figure switches $S_1$ and $S_2$ are in open condition. The resistance across ab when the switches $S_1$ and $S_2$ are closed is...
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Q JEE MAIN 2019
A cell of internal resistance r drives current through an external resistance R. The power delivered by the cell to the external resistance will be...
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Q JEE MAIN 2021
The Value of current in the $6 \Omega$ resistance is :
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Q JEE MAIN 2021
Two resistors $\mathrm{R}_1=(4 \pm 0.8) \Omega$ and $\mathrm{R}_2=(4 \pm 0.4) \Omega$ are connected in parallel. The equivalent resistance of their parallel combination will be :
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Q JEE MAIN 2022
In the given figure of meter bridge experiment, the balancing length AC corresponding to null deflection of the galvanometer is 40 cm. The balancing length,...
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Q JEE MAIN 2022
A. The drift velocity of electrons decreases with the increase in the temperature of conductor.
B. The drift velocity is inversely proportional to the...
JEE Main Physics Medium
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Q JEE MAIN 2021
Two wires of same length and thickness having specific resistances $6 \Omega \mathrm{~cm}$ and $3 \Omega \mathrm{~cm}$ respectively are connected in parallel. The effective resistivity...
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Q JEE MAIN 2021
Consider a 72 cm long wire AB as shown in the figure. The galvanometer jockey is placed at P on AB at a distance x...
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Q JEE Main 2019
Drift speed of electrons, when 1.5 A of current flows in a copper wire of cross section $5 \mathrm{~mm}_2$, is v . If the electron...
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