The switch in Figure (a) closes when `Vc = 2V//3` and opens when `Vc = V//3`. The voltmeter reads a voltage as plotted in figure (b). What is the period T of the waveform? (take `R_(1) = 6R` and `R_(2) = 3R`, and `ln2 = 0.7` if required)
(a)

V_C is the ideal voltmeter in the figure. Resistance of the resistor shown is R. Initially the switch is in position 2 when charging of the capacitor starts. Initially the capacitor was uncharged. The switch in circuit shifts automatically from 2 to 1 when V_C gt 2V//3 and goes back to 2 from 1 when V_C lt V//3 . The ideal voltmeter reads voltage across capacitor as plotted. What is the period T of the wave from in terms of R and C ? ,

In the following figure, the reading of an ideal voltmeter V is zero. Then, the relation between R, r_(1) " and " r_(2) is

Two spheres of radii R and 2R are charged to potential V0 and 2 V0 and are connected by a battery of emf V0 as shown in figure. When switch 'S' is closed then

An ammeter A, a voltmeter V and a resistance R are connected as shown in the figure. If the voltmeter reading is 1.6V and the ammeter reading is 0.4 A, then R is

An ammeter A, a voltmeter V and a resistance R are connected as shown in the figure. If the voltmeter reading is 1.6V and the ammeter reading is 0.4 A, then R is

In the circuit shown, when switch S_(1) is closed and S_(2) is open, the ideal voltmeter shows a reaiding of 18 V . When switch S_(2) is closed and S_(1) is open, the reading of voltmeter is 24 V . When S_(1) and S_(2) both are closed, the voltmeter reading will be

In the circuit shown, when switch S_(1) is closed and S_(2) is open, the ideal voltmeter shows a reaiding of 18 V . When switch S_(2) is closed and S_(1) is open, the reading of voltmeter is 24 V . When S_(1) and S_(2) both are closed, the voltmeter reading will be

The circuit in figure, where there are three resistors R_(1),R_(2) and R_(3) . If the voltage between A and C is V, the current / is given by