1
JEE Advanced 2019 Paper 1 Offline
MCQ (More than One Correct Answer)
+4
-1
A charged shell of radius R carries a total charge Q. Given $$\phi$$ as the flux of electric field through a closed cylindrical surface of height h, radius r and with its center same as that of the shell. Here, center of the cylinder is a point on the axis of the cylinder which is equidistant from its top and bottom surfaces. Which of the following option(s) is/are correct?

[$$\in$$0 is the permittivity of free space]
A
If h > 2R and r = 4R / 5 then $$\phi$$ = Q / 5 $$\in$$0
B
If h > 2R and r = 3R / 5 then $$\phi$$ = Q / 5 $$\in$$0
C
If h > 8R /5 and r = 3R / 5 then $$\phi$$ = 0
D
If h > 2R and r = R then $$\phi$$ = Q / $$\in$$0
2
JEE Advanced 2019 Paper 1 Offline
MCQ (More than One Correct Answer)
+4
-1
Two identical moving coil galvanometers have 10$$\Omega$$ resistance and full scale deflection at 2$$\mu$$A current. One of them is converted into a voltmeter of 100 mV full scale reading and the other into an ammeter of 1 mA full scale current using appropriate resistors. These are then used to measure the voltage and current in the Ohm's law experiment with R = 1000$$\Omega$$ resistor by using an ideal cell. Which of the following statement(s) is/are correct?
A
The resistance of the voltmeter will be 100 k$$\Omega$$.
B
The resistance of the ammeter will be 0.02 $$\Omega$$

(round off to 2nd decimal place).
C
If the ideal cell is replaced by a cell having internal resistance of 5$$\Omega$$ then the measured value of R will be more than 1000$$\Omega$$.
D
The measured value of R will be 978$$\Omega$$ < R < 982$$\Omega$$.
3
JEE Advanced 2016 Paper 2 Offline
MCQ (More than One Correct Answer)
+4
-2
Consider two identical galvanometers and two identical resistors with resistance R. If the internal resistance of the galvanometers Rc < R/2, which of the following statement(s) about anyone of the galvanometers is(are) true?
A
The maximum voltage range is obtained when all the components are connected in series
B
The maximum voltage range is obtained when the two resistors and one galvanometer are connected in series, and the second galvanometer is connected in parallel to the first galvanometer
C
The maximum current range is obtained when all the components are connected in parallel
D
The maximum current range is obtained when the two galvanometers are connected in series, and the combination is connected in parallel with both the resistors
4
JEE Advanced 2016 Paper 2 Offline
MCQ (More than One Correct Answer)
+4
-2
In the circuit shown below, the key is pressed at time t = 0. Which of the following statement(s) is (are) true?

A
The voltmeter display $$-$$5V as soon as the key is pressed and displays +5 V after a long time
B
The voltmeter will display 0 V at time t = ln 2 seconds
C
The current in the ammeter becomes 1/e of the initial value after 1 second
D
The current in the ammeter becomes zero after a long time
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