List of top Physics Questions on Capacitors and Capacitance asked in NEET (UG)

ત્રણ સમાન કેપેસિટર P, Q અને S, દરેકની કેપેસિટન્સ C,ને વોલ્ટેજ Vવાળી બેટરી સાથે જોડવામાં આવ્યા છે. જો કેપેસિટર Pમાં સંગ્રહિત સંભવિત ઊર્જા \( U_P \) અને સિસ્ટમમાં કુલ સંગ્રહિત ઊર્જા \( U_T \) હોય, તો ગુણોત્તર \( \frac{U_P}{U_T} \) છે:

The plates of a parallel plate capacitor are separated by d. Two slabs of different dielectric constant \(K_1\) and \(K_2\) with thickness \(d/2\) and \(d/2\) respectively are inserted in the capacitor. Due to this, the capacitance becomes two times larger than when there is nothing between the plates. If \(K_1 = 1.25 K_2\), the value of \(K_2\) is :

A 10 µF capacitor is connected to a 210 V, 50 Hz source as shown in figure. The peak current in the circuit is nearly (π = 3.14) :
:

The capacitance of a capacitor with charge q and a potential difference V depends on :

A parallel plate capacitor is charged by connecting it to a battery through a resistor. If I is the current in the circuit, then in the gap between the plates :

In the following circuit, the equivalent capacitance between terminal A and terminal B is :

The capacitance of a parallel plate capacitor with air as medium is $6\, \mu F$. With the introduction of a dielectric medium, the capacitance becomes 30 $\mu F.$ The permittivity of the medium is : $(\epsilon_0 = 8.85 \times 10^{-12} C^2N^{-1}m^{-2}$)

A battery consists of a variable number ‘n’ of identical cells (having internal resistance ‘r’ each) which are connected in series. The terminals of the battery are short-circuited and the current I is measured. Which of the graphs shows the correct relationship between I and n ?