In the circuit shown, initially there is no charge on the capacitors and keys S1 and S2 are open. The values of the capacitors are C1 = 10$$\mu $$F, C2 = 30$$\mu $$F and C3 = C4 = 80$$\mu $$F.
Which of the statement(s) is/are correct?
A
The key S1 is kept closed for long time such that capacitors are fully charged. Now, key S2 is closed, at this time, the instantaneous current across 30$$\Omega $$ resistor (between points P and Q) will be 0.2 A (round off to 1st decimal place).
B
If key S1 is kept closed for long time such that capacitors are fully charged, the voltage across the capacitor C1 will be 4V.
C
At time t = 0, the key S1 is closed, the instantaneous current in the closed circuit will be 25 mA.
D
If key S1 is kept closed for long time such that the capacitors are fully charged, the voltage difference between points P and Q will be 10 V.
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
