The charges Q, +q, and +q are placed at the vartices of an equilateral
The charges Q, +q, and +q are placed at the vartices of an equilateral triangle of side l. If the net electrostatic potential energy of the system is zero, the Q is equal to
Electrostatics
A parallel plate capacitor with air between the plates has a capacitance of 9 pF.
A parallel plate capacitor with air between the plates has a capacitance of 9 pF. The seperation between its plates is d. The space between the plates is now filled with two dielectrics. One of […]
A parallel plate condenser with a dielectric of dielectric constant K between the plates
A parallel plate condenser with a dielectric of dielectric constant K between the plates has a capacity C and is charges to a potential V volt. The dielectric slab is slowly removed from between the […]
An electric charge 10⁻³ μC is placed at the origin (0,0) of X-Y co-ordinate system.
An electric charge 10⁻³ μC is placed at the origin (0,0) of X-Y co-ordinate system. Two points A and B are situated at (√2,√2) and (2,0) respectively. The potential difference between the points A and […]
If the distance between the plates of two capacitor is increased then capacitance
If the distance between the plates of two capacitor is increased then capacitance
Options
(a) increase (b) decrease (c) remains constant (d) first increase then decrease
Correct Answer:
decrease
Explanation:
Capacitance of a […]
A parallel plate air capacitor is connected to battery. After charging fully
A parallel plate air capacitor is connected to battery. After charging fully, the battery is disconnected and the plates are pulled further apart. The strength of the electric field inside the capacitor would
Options […]
Three capacitors each of capacity 4 μF are to be connected in such a way that the effective
Three capacitors each of capacity 4 μF are to be connected in such a way that the effective capacitance is 6 μF. This can be done by
Options
(a) connecting two in parallel […]
The potential of a large liquid drop when eight liquid drops are combined is 20 V.
The potential of a large liquid drop when eight liquid drops are combined is 20 V. Then the potential of each single drop was
Options
(a) 10 V (b) 7.5 V (c) 5 […]
Two identical charges repel each other with a force equal to 10 mgwt they are 0.6 m
Two identical charges repel each other with a force equal to 10 mgwt they are 0.6 m apart in air. (g=10 ms⁻²). The value of each charge is
Options
(a) 2 mC (b) […]
Two identical capacitors each of capacitance 5 mF are charged potentials 2 kV and 1 kV
Two identical capacitors each of capacitance 5 mF are charged potentials 2 kV and 1 kV respectively. The -ve ends are connected together. When +ve ends are also connected together, the loss of energy of […]