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JEE Main 2020 (Online) 7th January Evening Slot
Numerical
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A 60 pF capacitor is fully charged by a 20 V supply. It is then disconnected from the supply and is conneced to another uncharged 60 pF capacitor in parallel. The electrostatic energy that is lost in this process by the time the charge is redistributed between them is (in nJ) _____
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JEE Main 2020 (Online) 7th January Evening Slot
Numerical
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JEE Main 2020 (Online) 7th January Evening Slot Physics - Rotational Motion Question 120 English Consider a uniform cubical box of side a on a rough floor that is to be moved by applying minimum possible force F at a point b above its centre of mass (see figure). If the coefficient of friction is $$\mu $$ = 0.4, the maximum possible value of 100 × $${b \over a}$$ for box not to topple before moving is .......
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JEE Main 2020 (Online) 7th January Evening Slot
Numerical
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The balancing length for a cell is 560 cm in a potentiometer experiment. When an external resistance of 10 $$\Omega $$ is connected in parallel to the cell, the balancing length changes by 60 cm. If the internal resistance of the ceil is $${N \over {10}}$$ $$\Omega $$ , where N is an integer then value of N is .............
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4
JEE Main 2020 (Online) 7th January Evening Slot
Numerical
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M grams of steam at 100oC is mixed with 200 g of ice at its melting point in a thermally insulated container. If it produced liquid water at 40oC [heat of vaporization of water is 540 cal/g and heat of fusion of ice is 80 cal/g] the value of M is ____
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