1
JEE Advanced 2020 Paper 1 Offline
Numerical
+4
-0 A circular disc of radius R carries surface charge density
$$\sigma \left( r \right) = {\sigma _0}\left( {1 - {r \over R}} \right)$$, where $$\sigma$$0 is a constant and r is the distance from the center of the disc. Electric flux through a large spherical surface that encloses the charged disc completely is $$\phi$$0. Electric flux through another spherical surface of radius $${R \over 4}$$ and concentric with the disc is $$\phi$$. Then the ratio $${{{\phi _0}} \over \phi }$$ is ________.
2
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 : 3
JEE Advanced 2014 Paper 1 Offline
Numerical
+3
-0
A galvanometer gives full scale deflection with 0.006 A current. By connecting it to a 4990 $$\Omega$$ resistance, it can be converted into a voltmeter of range 0-30V. If connected to a $${{2n} \over {249}}\Omega$$ resistance, it becomes an ammeter of range 0-1.5 A. The value of n is
4
IIT-JEE 2011 Paper 2 Offline
Numerical
+3
-0

Two batteries of different emfs and different internal resistance are connected as shown. The voltage across AB in volts is __________. Physics
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