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Electrostatic Potential and Capacitance, (1+2+3+5=11), For: PU Board 2021, , 1 Marks, 1. What is a capacitor?, (2014), 2. What is an electric dipole?, (2016), 3. How does the electrostatic force between two-point charges change, when a dielectric, medium is introduced between them?, (2017s), 4. What is electrostatic shielding?, (2021m), 5. What is an equipotential surface?, (2021m), 2 Marks, 1. Establish the relation between electric field and electric potential., (2014,2017s), 2. Derive the expression for capacitance of parallel plate capacitor., (2015), 3. On what factors does the capacitance of a parallel plate capacitors depends?, (2017,2021m), 4. Obtain the expression for effective capacitance of two capacitors connected in series., (2018s,2019s), 5. A parallel plate capacitor with air between the plates has a capacitance C. what will be the, capacitance if, (2020), a) The distance between the plates is doubled?, b) The space between the plates is filled with a substance of dielectric constant 5?, 6. Write the relation between electric field and potential. A point charge +Q is placed at point O, as shown in the figure. Is the potential difference VA – VB positive, negative or zero? (2021m), , 3 Marks, 1. Derive the expression for potential energy of a system of charges in the absence of the external, electric field., (2014,2016s,2021m), 2. Derive the expression for capacitance of parallel plate capacitor., (2015), 3. Derive the relation between electric field and electric potential due to a point charge., (2015,2017,2020), 4. Derive an expression for energy stored in a charged capacitor., (2016,2020,2021m), 5. Derive an expression for potential energy of electric-di-pole placed in an uniform electric field., (2019), 5 Marks, 1. In a parallel plate capacitor with air between the plates, each plate has an area of 6×10-3 m2 and, the distance between the plates is 3 mm. calculate the capacitance of capacitor., If this capacitor is connected to a 100V supply. What is the charge on each plate of the, capacitor? [Absolute permittivity of free space = 8.85×10-12Fm-1], (2014), -8, -8, 2. Two charges 3×10 c and -2×10 c are located 15 cm apart. At what point on the line joining, the two charges is the electric potential zero? Take the potential at infinity to be zero., (2014s), 3. Two-point charges +1nC and -4nC are 1m apart in air. Find the positions along the line joining, the two charges at which resultant potential is zero., (2015), , Download our App “SimplifiedMinds”, , @SimplifiedMinds, www.simplifiedminds.com, Call Us: 7411-008-008, Whatsapp Us: 8867-008-008

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Electrostatic Potential and Capacitance, (1+2+3+5=11), For: PU Board 2021, , 4. ABCD is a square of side 2m. Charge of 5nC, +10nC and -5nC are placed at corner A, B and, C respectively. What is the work done in transferring a charge of 5𝜇C from D to the point of, intersection of the diagonals, (2015s), 5. When two capacitors are connected in series and connected across 4kV line, the energy stored, in the system is 8J. The same capacitor, if connected in parallel across the same line, the energy, stored is 36J. Find the individual Capacitances., (2016), 6. Charges 2𝜇C, 4𝜇C and 6𝜇C are placed at the three corners A, B and C respectively of a square, ABCD of side x meter. Find, what charge must be placed at the fourth corner so that the total, potential at the center of the square is zero., (2016s), -3, 7. In a parallel plate capacitor with air between the plates, each plate has an area 8 × 10 m2, and distance between the plates is 2 mm. Calculate the capacitance of the capacitor. If this, capacitor is connected to a 50 V supply, what is the charge on each plate of the capacitor?, (Absolute permittivity of free space = 8.85 × 10-12 Fm-1), (2017s), 2, 8. The plates of a parallel plate capacitor have an area of 100 cm each and are separated by 3, mm. The capacitor is charged by connecting it to a 400 V simply., (2018s), a) Calculate the electrostatic energy stored in the capacitor., b) If a dielectric of dielectric constant 2.5 is introduced between the plates of the capacitor,, then find the electrostatic energy stored and also change in the energy stored., 9. In a circular parallel plate capacitor radius of each plate is 5 cm and they are separated by a, distance of 2mm. calculate the capacitance and the energy stored, when it is charged by, connecting the battery of 200 V (given ∈0 = 8.854 × 10-12Fm-1)., (2019), 10. ABCD is a square of side 1m. Charges of +3Nc, -5nC and +3 nC are placed at the comers A,, B and C respectively. Calculate the work done in transferring a charge of 12𝜇C from D to the, point of intersection of the diagonals?, (2019s), 11. Two charges 5×10-8c and -3×10-8c are located 16 cm apart. At what point on the line joining, the two charges is the electric potential zero? Take the potential at infinity to be zero. (2021m), 12. A 4 μF capacitor is charged by a 200 V supply. It is then disconnected from the supply, and, is connected to another uncharged 2 μF capacitor. How much electrostatic energy of the first, capacitor is lost in the form of heat and electromagnetic radiation?, (2021m), NOTE:, Delete Portions as per 2021 Board : Nil, , What you get on our app?, 1., 2., 3., , Video Solutions for topic and marks wise, Lecture pdfs and Hand written notes for important formulas and derivations for PU Board., In app chat feature for all your doubts directly with the faculty (RP Sir), , Download our App “SimplifiedMinds”, , @SimplifiedMinds, www.simplifiedminds.com, Call Us: 7411-008-008, Whatsapp Us: 8867-008-008