1
JEE Main 2020 (Online) 9th January Evening Slot
Numerical
+4
-0
In a meter bridge experiment S is a standard resistance. R is a resistance wire. It is found that balancing length is $$l$$ = 25 cm. If R is replaced by a wire of half length and half diameter that of R of same material, then the balancing distance $$l'$$ (in cm) will now be________.
2
JEE Main 2020 (Online) 8th January Evening Slot
Numerical
+4
-0
The series combination of two batteries, both of the same emf 10 V, but different internal resistance of 20$$\Omega$$ and 5$$\Omega$$, is connected to the parallel combination of two resistors 30$$\Omega$$ and R $$\Omega$$. The voltage difference across the battery of internal resistance 20$$\Omega$$ is zero, the value of R (in $$\Omega$$) is : _______
3
JEE Main 2020 (Online) 8th January Morning Slot
Numerical
+4
-0
Four resistances of 15$$\Omega$$, 12$$\Omega$$, 4$$\Omega$$ and 10$$\Omega$$ respectively in cyclic order to form Wheatstone's network. The resistance that is to be connected in parallel with the resistance of 10$$\Omega$$ to balance the network is _____$$\Omega$$.
4
JEE Main 2020 (Online) 7th January Evening Slot
Numerical
+4
-0
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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