ELECTROSTATICS-AND-CAPACITANCE-QUIZ-8

ELECTROSTATICS AND CAPACITANCE QUIZ-8

Dear Readers,

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. Two parallel large thin metal sheets have equal surface charge densities (σ=26.4×10^-12 Cm^-2of opposite signs. The electric field between these sheets is

•  1.5 NC^-1
•  1.5×10^-10 NC^-1
•  3 NC^-1
•  3×10^-10 NC^-1

Solution

Q2.For the circuit shown figure, which of the following statements is true?

•  With S₁ closed, V₁=15 V,V₂=20 V
•  With S₃ closed, V₁=V₂=20 V
•  With S₁and, S₃ closed,V₁=V₂=0
•  With S₁ and S₃closed, V₁=30 V,V₂=20 V

Solution

Q3.  Electric field on the axis of a small electric dipole at a distance r is E1andE2 at a distance of 2r on a line of perpendicular dissector. Then

•  E2=-(E1/8)
•  E2=-(E1/16)
•  E2=-(E1/4)
•  E2=(E1/8)

Solution

Q4. On increasing the plate separation of a charged capacitor, the energy

•  Increases
•  Decreases
•  Remain Unchanged
•  Zero

Solution

Q5.Two capacitors of capacitance C are connected in series. If one of them is filled with dielectric substance K, what is the effective capacitance?

•  KC/((1+K))
•  C(K+1)
•  2KC/((1+K))
•  None of These

Solution
 

Q6. 1000 similar electrified rain drops merge together into one drop so that their total charge remains unchanged. How is the electric energy affected?

•  100 times
•  102 times
• 200 times
•  400 times

Solution

Q7.Three charges 1μC,2μC,3μC are kept at vertices of an equilateral triangle of side 1m. If they are brought nearer, so that they now form an equilateral triangle of side 0.5m, then work done is

•  11J.
•  1.1J
•  0.01J
•  0.11J

Solution

Q8. 27 identical drops of mercury are charged simultaneously to the same potential of 10 V each. Assuming drops to be spherical, if all the charged drops are made to combine to form one large drop, then the potential of larger drop would be :

•  45 V
•  135 V
•  270 V
•  90 V

Solution

Q9.If the potential of a capacitor having capacity 6μF is increased from 10 V to 20 V, then increase in its energy is

•  12×10^-6 J
•  9×10^-4 J
•  4.5×10^-4 J
•  2.25 ×10^-6 J

Solution

Q10. For the circuit shown in figure the charge on 4μF capacitor is

•  40 μC
•  30 μC
•  24 μC
• 54 μC

Solution