1
JEE Advanced 2021 Paper 2 Online
Numerical
+4
-0
Change Language
In order to measure the internal resistance r1 of a cell of emf E, a meter bridge of wire resistance R0 = 50$$\Omega$$, a resistance R0/2, another cell of emf E/2 (internal resistance r) and a galvanometer G are used in a circuit, as shown in the figure. If the null point is found at l = 72 cm, then the value of r1 = __________ $$\Omega$$.

JEE Advanced 2021 Paper 2 Online Physics - Current Electricity Question 19 English
Your input ____
2
JEE Advanced 2020 Paper 2 Offline
Numerical
+4
-0
Change Language
In the balanced condition, the values of the resistances of the four arms of a Wheatstone bridge are shown in the figure below. The resistance R3 has temperature coefficient 0.0004$$^\circ$$C-1. If the temperature of R3 is increased by 100$$^\circ$$C, the voltage developed between S and T will be ________ volt.

JEE Advanced 2020 Paper 2 Offline Physics - Current Electricity Question 22 English
Your input ____
3
JEE Advanced 2019 Paper 1 Offline
Numerical
+3
-0
Change Language
A parallel plate capacitor of capacitance C has spacing d between two plates having area A. The region between the plates is filled with N dielectric layers, parallel to its plates, each with thickness, $$\delta = {d \over N}$$. The dielectric constant of the mth layer is $${K_m} = K\left( {1 + {m \over N}} \right)$$. For a very large N(>103), the capacitance C is $$\alpha \left( {{{K{\varepsilon _0}A} \over {d\ln 2}}} \right)$$

The value of $$\alpha $$ will be ..................

[$$ \in $$0 is the permittivity of free space.]
Your input ____
4
JEE Advanced 2015 Paper 2 Offline
Numerical
+4
-0
In the following circuit, the current through the resistor R(=2$$\Omega$$) is I amperes. The value of I is :
JEE Advanced 2015 Paper 2 Offline Physics - Current Electricity Question 21 English
Your input ____
JEE Advanced Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
CBSE
Class 12