## Electrostatics and Capacitance Quiz-3

As per analysis for previous years, it has been observed that students preparing for NEET find Physics out of all the sections to be complex to handle and the majority of them are not able to comprehend the reason behind it. This problem arises especially because these aspirants appearing for the examination are more inclined to have a keen interest in Biology due to their medical background.

Furthermore, sections such as Physics are dominantly based on theories, laws, numerical in comparison to a section of Biology which is more of fact-based, life sciences, and includes substantial explanations. By using the table given below, you easily and directly access to the topics and respective links of MCQs. Moreover, to make learning smooth and efficient, all the questions come with their supportive solutions to make utilization of time even more productive. Students will be covered for all their studies as the topics are available from basics to even the most advanced.

Q21. Three capacitors of capacitance C(Î¼F) are connected in parallel to which a capacitor of capacitance C is connected in series. Effective capacitance is 3.75, then capacity of each capacitor is
•  4 Î¼F
•  5 Î¼F
•  8 Î¼F
•  6 Î¼F
Solution

Q22.Two capacitors of capacitance 2 Î¼F and 4Î¼F respectively are connected in series. The combination is connected across a potential difference of 10 V. The ratio of energies stored by capacitors will be
•  1 ∶ √2
•  2 : 1
•  1 : 4
•  4 : 1
Solution

Q23.  If dielectric is inserted in charged capacitor (battery removed ), then quantity that remains constant is
•   Capacitance
•  Potential
•  Intensity
•  Charge
Solution

Q24. Number of electric lines of force from 0.5 C if positive charge in a dielectric medium of constant 10 is
•  5.65×109
•  1.13×1011
•  9×109
•  8.85×10-12
Solution

Q25.In bringing an electron towards another electron, the electrostatic potential energy of the system
•  Decreases
•  Increases
•  Remains same
•  Becomes zero
Solution

Q26. A gang capacitor is formed by interlocking a number of plates as shown in figure. The distance between the consecutive plates is 0.885 cm and the overlapping area of the plates is 5 cm2. The capacity of the unit is

•  1.06 pF
•  4 pF
•  6.36 pF
•  12.72 pF
Solution

Q27.The potential at a point P which is forming a corner of a square of side 93mm with charges, Q1=33 nC,Q2=-51 nC,Q3=47nC located at the other three corners is nearly
•  16kV
•  4kV
•  400V
•  160V
Solution

Q28.In the given figure, a hollow spherical capacitor is shown. The electric field will not be zero at

•  r < r1
•  r1 < r2
•  r < r2
•  r1 < r < r2
Solution

Q29.Two positive point charges of 12Î¼C and 5Î¼C are placed 10 cm apart in air. The work needed to bring them 4 cm closer is
•  2.4 J
•  3.6 J
•  1.6 J
•  6 J
Solution

Q30. A thin spherical conducting shell of radius R has a charge q. Another charge Qis placed at the centre of the shell. The electrostatic potential at a point P at a distance R/2 from the centre of the shell is
•  2Q/(4Ï€Îµ0 R)
•  2Q/(4Ï€Îµ0 R)-2q/(4Ï€Îµ0 R)
•  2Q/(4Ï€Îµ0 R)+q/(4Ï€Îµ0 R)
• ((q+Q))/(4Ï€Îµ0 ) 2/R
Solution

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