Doubts
Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents
Sign in to save progress →
Doubts
Sign in

Capacitor question

2017 · 8 Apr · Shift 1 · Q59
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /JEE Main
  3. /Physics
  4. /Capacitor
  5. /2017 · 8 Apr · Shift 1 · Q59

Capacitor question

2017 · 8 Apr · Shift 1 · Q59

JEE MainPhysicsCapacitorMCQ+4 / −1
The energy stored in the electric field produced by a metal sphere is 4.5 J. If the sphere contains 4 μ\muμ C charge, its radius will be : [ Take : 14 π∈0={1 \over {4\,\pi { \in _0}}} =4π∈0​1​= 9 ×\times× 109 N −-− m2/C2 ]
  1. A
    20 mm
  2. B
    32 mm
  3. C
    28 mm
  4. D
    16 mm
PreviousNext

More from Capacitor

  • A combination of parallel plate capacitors is maintained at a certain potential difference. When a 3 mm thick slab is introduced between all the plates, in order to maintain the same potential difference, the distance between the plates is… Includes diagram2017 · MCQ
  • In the given circuit diagram when the current reaches steady state in the circuit, the charge on the capacitor of capacitance C will be: Includes diagram2017 · MCQ
  • A capacitance of 2 μ F is required in an electrical circuit across a potential difference of 1.0 kV. A large number of 1 μ F capacitors are available which can withstand a potential difference of not more than 300 V. The minimum…2017 · MCQ
  • Three capacitors each of 4 μ F are to be connected in such a way that the effective capacitance is 6 μ F. This can be done by connecting them :2016 · MCQ
  • Figure shows a network of capacitors where the numbers indicates capacitances in micro Farad. The value of capacitance C if the equivalent capacitance between point A and B is to be 1 μ F is : Includes diagram2016 · MCQ
  • A combination of capacitors is set up as shown in the figure. The magnitude of the electric field, due to a point charge Q(having a charge equal to the sum of the charges on the 4μF and 9μF capacitors), at a point distance 30m… Includes diagram2016 · MCQ
  • In the given circuit, charges Q2​ on the 2μF capacitor changes as C is varied from 1μF to 3μF.Q2​ as a function of ′C′ is given properly by: (figuresaredrawnschematicallyandarenottoscale)… Includes diagram2015 · MCQ
  • A parallel plate capacitor is made of two circular plates separated by a distance 5mm and with a dielectric of dielectric constant 2.2 between them. When the electric field in the dielectric is 3×104V/m the charge density…2014 · MCQ