JEE Main · Physics
Capacitance
20 practice questions, each with the answer and an explanation.
Practise Capacitance now
Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.
All 20 questions
- A parallel plate capacitor with air between the plates has capacitance and is charged to a potential difference by a battery. The battery is then disconne…
- A parallel plate capacitor has plate area and plate separation . A dielectric slab of dielectric constant and thickness is inser…
- Two capacitors of capacitances and are connected in series across a DC supply. What is the potential difference across the…
- What is the electrostatic force of attraction between the two plates of a parallel plate capacitor carrying charge and having plate area ?
- A capacitor is charged to and then connected in parallel with an uncharged capacitor. What is the loss of electrostatic potential energy during the re…
- What is the electrostatic energy density stored in an electric field of magnitude in vacuum? (…
- An isolated conducting spherical shell has radius . What is its capacitance in free space? ()
- A parallel plate capacitor is permanently connected across a battery of voltage . If the distance between the plates is doubled while keeping the battery connected, which of the following statement…
- Three identical capacitors each of capacitance are connected as shown: two in parallel, and this combination connected in series with the third. What is the equivalent capacitance of the network?
- A thin metallic sheet of thickness () is introduced between the plates of a parallel plate capacitor of plate separation . What is the new capacitance?
- In a cylindrical capacitor composed of two coaxial cylinders of radii and () and length , the capacitance per unit length is given by which expression?
- A parallel plate capacitor is charged by a battery. Which of the following quantities remains UNCHANGED when a dielectric slab is inserted while the battery remains connected?
- The equivalent capacitance of an infinite ladder network of capacitors, where each repeating section consists of a series capacitor and a shunt parallel capacitor…
- A parallel plate capacitor is filled with two different dielectric slabs of equal thickness and dielectric constants and placed one on top of the other between plates of separation…
- What is the capacitance of a spherical capacitor formed by two concentric conducting spheres of radii and () with vacuum between them, when the outer sphere is grounded?
- How much charge is stored on each plate of a capacitor connected to a battery?
- A capacitor of capacitance is charged to a potential and then discharged through a resistor . At time (one time constant), what fraction of the initial charge remains on the…
- If identical small spherical droplets of mercury, each of radius and capacitance , coalesce to form a single large spherical drop, what is the capacitance of the combined drop?
- What is the potential of the large drop formed by the coalescence of identical spherical droplets, each charged to a potential ?
- A variable air capacitor has 11 parallel movable plates interleaved with 10 fixed plates. The area of each plate is and the separation between consecutive plates is . What is the maximum capaci…