## ELECTROSTATICS AND CAPACITANCE QUIZ-6

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.

Q1. A parallel plate capacitor with air as the dielectric has capacitance C. A slab of dielectric constant K and having the same thickness as the separation between the plates is introduced so as to fill one-fourth of the capacitor as shown in the figure. The new capacitance will be
•  (K+3) C/4
•  (K+2)C/4
•  (K+1)C/4
•  KC/4
Solution

Q2.An electric charge 10-3 Î¼C is placed at the origin (0, 0) of X-Y coordinate system. Two points A and B are situated at (√2,√2)and(2,0)respectively. The potential difference between the points A and B will be Which of the following sets of reactants is used for preparation of paracetamol from phenol?
•  9V
•  Zero
•  2V
•  4.5 v
Solution

Q3.  A parallel plate air capacitor has a capacitance C. When it is half filled with a dielectric constant 5, the percentage increase in the capacitance will be
•  400 %
•  66.6 %
•  33.3 %
•  200 %
Solution

Q4. In a charged capacitor the energy stored in
•  The positive charges
•  Negative Charges
•  The field between the plates
•  None of the above
Solution

Q5.The charge deposited on 4Î¼F capacitor the circuit is
•  6×10-6 C
•  12×10-6 C
•  24×10-6 C
•  36×10-6 C
Solution

Q6. A capacitor is charged to store an energy U. the charging battery is disconnected. An identical capacitor is now connected to the first capacitor in parallel. The energy in each of the capacitor is
•  3 U/2
•  U
• U/4
•  U/2
Solution

Q7.Work done in carrying a charge Q' once round the circle of radius r with a charge Q at the centre is
•  1/(4Ï€Ïµ0 )Q/r.
•  1/(4Ï€Îµ0 )QQ'/r.
•  Zero.
•  QQ'/2r
Solution

Q8.An uncharged sphere of metal is placed inside a charged parallel plate capacitor. The lines of force will look like:
•

•

•

•

Solution

Q9.Two identical air core capacitors are connected in series to a voltage source of 15 V. If one of the capacitors is filled with a medium of dielectric constant 4, the new potential across this capacitor is
•  5V
•  8 V
•  10 V
•  12 V
Solution

Q10. A spherical drop of mercury having a potential of 2.5V is obtained as a result of merging 125 droplets. The potential of a constituent droplets would be
•  1.0V
•  0.5V
•  0.2V
• 0.1V
Solution

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