JEE Questions for Physics Electrostatics Ii Quiz 8 - MCQExams.com

For the circuit shown figure, which of the following statements is true ?
Physics-Electrostatics II-73617.png

  • Physics-Electrostatics II-73618.png
  • 2)
    Physics-Electrostatics II-73619.png

  • Physics-Electrostatics II-73620.png

  • Physics-Electrostatics II-73621.png
Two identical metal plates are given positive charges Q1 and Q2 (< Q1) respectively. If they are now brought close to together to form a parallel plate capacitor with capacitance C, the potential difference between them is

  • Physics-Electrostatics II-73623.png
  • 2)
    Physics-Electrostatics II-73624.png

  • Physics-Electrostatics II-73625.png

  • Physics-Electrostatics II-73626.png

Physics-Electrostatics II-73628.png
  • 80, 40, 40 and 20V
  • 20, 40, 40 and 80V
  • 35, 35, 35 and 35V
  • 80, 20, 20 and 20V
In the arrangement of capacitors shown in figure, each capacitor is of 9μF, then the equivalent capacitance between the points A and B is
Physics-Electrostatics II-73630.png
  • 18 F
  • 9 F
  • 15 F
  • 4.5 F

Physics-Electrostatics II-73632.png

  • Physics-Electrostatics II-73633.png
  • 2)
    Physics-Electrostatics II-73634.png

  • Physics-Electrostatics II-73635.png

  • Physics-Electrostatics II-73636.png
Two air capacitors A = 1F , B = 4 F are connected in series with 35 V source. When a medium of dielectric constant K = 3 is introduced between the plates of A, change on the capacitor changes by
  • 16 c
  • 32 c
  • 28 c
  • 60 c
A parallel plate capacitor with air between the plates has a capacitance of 9 pF. The separation between its plates is d. The space between the plates is now filled with two dielectrics. One of the dielectric constant K1 = 3 and thickness d/3 while the other one has dielectric constant K2 = 6 and thickness 2d/3. Capacitance of the capacitor is now
  • 1.8 pF
  • 20.25 pF
  • 40.5 pF
  • 45 pF

Physics-Electrostatics II-73640.png

  • Physics-Electrostatics II-73641.png
  • 2)
    Physics-Electrostatics II-73642.png

  • Physics-Electrostatics II-73643.png

  • Physics-Electrostatics II-73644.png
A parallel plate condenser with dielectric of constant K between the plates has a capacity C and is charged to potential V volt. The dielectric slab is slowly removed from between the plates and reinserted. The network done by the system in this process is
  • Zero
  • 2)
    Physics-Electrostatics II-73645.png

  • Physics-Electrostatics II-73646.png

  • Physics-Electrostatics II-73647.png

Physics-Electrostatics II-73648.png

  • Physics-Electrostatics II-73649.png
  • 2)
    Physics-Electrostatics II-73650.png

  • Physics-Electrostatics II-73651.png

  • Physics-Electrostatics II-73652.png

Physics-Electrostatics II-73653.png

  • Physics-Electrostatics II-73654.png
  • 2)
    Physics-Electrostatics II-73655.png

  • Physics-Electrostatics II-73656.png

  • Physics-Electrostatics II-73657.png
A battery is used to charge a parallel plate capacitor till the potential difference between the plates becomes equal to the electromotive force of the battery. The ratio of the energy stored in the capacitor and work done by the battery will be

  • Physics-Electrostatics II-73659.png
  • 2)
    Physics-Electrostatics II-73660.png
  • 1

  • Physics-Electrostatics II-73661.png
Two spherical conductors A and B of radii 1mm and 2mm are separated by a distance of 5mm and are uniformly charged. If the spheres are connected by a conducting wire then in equilibrium condition, the ratio of the magnitude of the electric fields at the surfaces of sphere of A and B is
  • 1 : 2
  • 2 : 1
  • 4 : 1
  • 1 : 4
The following arrangement consists of five identical metal plates marked 1, 2, 3, 4 and 5 parallel to each other. Area of each plate is A and separation between the successive plates is d. The capacitance between P and Q is
Physics-Electrostatics II-73664.png

  • Physics-Electrostatics II-73665.png
  • 2)
    Physics-Electrostatics II-73666.png

  • Physics-Electrostatics II-73667.png

  • Physics-Electrostatics II-73668.png
A parrallel plate capacitor of capacitance 5F and plate separation 6 cm is connected to a1 V battery and charged. A dielectric of dielectric constant 4 and thickness 4 cm is introduced between the plates of the capacitor. The additional charge that flows into the capacitor from the battery is
  • 2 c
  • 5 c
  • 3 c
  • 10 c
For circuit the equivalent capacitance between points P and Q is
Physics-Electrostatics II-73671.png
  • 6 C
  • 4 C

  • Physics-Electrostatics II-73672.png

  • Physics-Electrostatics II-73673.png
Four identical capacitors are connected in series with a 10 V battery as shown in the figure. Potentials at A and B are
  • 10 V, 0 V
  • 5 V, –5V
  • 7.5 V, –2.5 V
  • 7.5 V, 2.5 V
64 identical drops of mercury are charged simultaneously to the same potential of 10 volt. Assuming the drops to be spherical, if all the charged drops are made to combine to form one large drop, then its potential will be
  • 100 V
  • 320 V
  • 640 V
  • 160 V
Two metal plate form a parallel plate capacitor. The distance between the plates is d. A metal sheet of thickness d/2 and of the same area is introduced between the plates. What is the ratio of the capacitance in the two cases ?
  • 4 : 1
  • 3 : 1
  • 2 : 1
  • 5 : 1

Physics-Electrostatics II-73677.png
  • 0.1224 J
  • 0.2224 J
  • 0.4224 J
  • 0.3224 J
Two parallel conducting plates of area A = 25m2 each are placed 6 mm apart and are both earthed. A third plate, identical with the first two, is placed at a distance of 2 mm from one of the earthed plates and is given a charged of 1 C. The potencial of the central plate is
Physics-Electrostatics II-73679.png

  • Physics-Electrostatics II-73680.png
  • 2)
    Physics-Electrostatics II-73681.png

  • Physics-Electrostatics II-73682.png

  • Physics-Electrostatics II-73683.png
What is the energy stored in the capacitor between terminals A and B of the network shown in the figure ? (Capacitance of each capacitor C = 1μF )
Physics-Electrostatics II-73685.png
  • Zero
  • 50 J
  • 12.5 J
  • 25 J

Physics-Electrostatics II-73687.png

  • Physics-Electrostatics II-73688.png
  • 2)
    Physics-Electrostatics II-73689.png

  • Physics-Electrostatics II-73690.png

  • Physics-Electrostatics II-73691.png
A parallel plate capacitor has plate of area A and separation d. It is charged to a potential difference Vo. The charging battery is disconnected and the plates are pulled apart to three times the initial separation. The work required to separate the plates is

  • Physics-Electrostatics II-73692.png
  • 2)
    Physics-Electrostatics II-73693.png

  • Physics-Electrostatics II-73694.png

  • Physics-Electrostatics II-73695.png
Two identical capacitors have the same capacitance C. one of them is charged to a potential V1 and the other V2. The negative ends of the capacitors are connected together. When the positive ends are also connected, the decrease in energy of the combined system is

  • Physics-Electrostatics II-73697.png
  • 2)
    Physics-Electrostatics II-73698.png

  • Physics-Electrostatics II-73699.png

  • Physics-Electrostatics II-73700.png
A parallel plate air capacitor has a capacitance C. When it is half filled with a dielectric of dielectric constant 5, the percentage increase in the capacitance will be
  • 200 %
  • 33.3 %
  • 400 %
  • 66.6 %
A network of six identical capacitors, each of value C is made as shown in figure. Equivalent capacitance between points A and B is
Physics-Electrostatics II-73703.png

  • Physics-Electrostatics II-73704.png
  • 2)
    Physics-Electrostatics II-73705.png

  • Physics-Electrostatics II-73706.png
  • 3C

Physics-Electrostatics II-73707.png
  • 4, 6, 7
  • 1, 2, 3
  • 1, 3, 6
  • 2, 3, 4
In the given arrangement of capacitors equivalent capacitance between points M and N is
Physics-Electrostatics II-73708.png

  • Physics-Electrostatics II-73709.png
  • 2)
    Physics-Electrostatics II-73710.png

  • Physics-Electrostatics II-73711.png

  • Physics-Electrostatics II-73712.png
An electric circuit requires a total capacitance of 2F across a potential of 1000 V. Large number of 1F capacitances are available each of which would breakdown if the potential is more then 350 V. How many capacitances are required to make the circuit ?
  • 24
  • 12
  • 20
  • 18
0:0:1


Answered Not Answered Not Visited Correct : 0 Incorrect : 0

Practice Physics Quiz Questions and Answers