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QJEE 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,...
JEE MainPhysicsEasy
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QJEE 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 MainPhysicsMedium
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QJEE 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...
JEE MainPhysicsEasy
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QJEE 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...
JEE MainPhysicsEasy
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QJEE 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...
JEE MainPhysicsEasy
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QJEE Main 2019
When the switch S, in the circuit shown, is closed, then the value of current i will be
The four arms of a Wheatstone bridge have resistances as shown in the figure. A galvanometer of $15 \Omega$ resistance is connected across BD. Calculate...
JEE MainPhysicsEasy
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QJEE-MAIN 2021
Two cells of emf 2E and E with internal resistance r1 and r2 respectively are connected in series to an external resistor R (see figure)....
JEE MainPhysicsEasy
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QJEE MAIN 2021
The energy dissipated by a resistor is 10 mJ in 1 s when an electric current of 2 mA flows through it. The resistance is...
JEE MainPhysicsEasy
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QJEE Main 2019
A resistance is shown in the figure. Its value and tolerance are given respectively by
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