NEET 2020 Revision: Electric Potential and Capacitance- 03 (24.02.2020)

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Question 1

A parallel plate air capacitor is charged to a potential difference of V volts. After disconnecting the charging battery the distance between the plates of the capacitor is increased using an insulating handle. As a result the potential difference between the plates:

• Adecreases
• Bdoes not change
• Cbecomes zero
• Dincreases

Question 2

A series combination of n1 capacitors, each of value C₁, is charged by a source of potential difference 4V. When another parallel combination of n₂ capacitors, each of value C₂, is charged by a source of potential difference V, it has the same (total) energy stored in it, as the fi rst combination has. The value ofC₂ , in terms of C₁, is then

• A
• B
• C
• D

Question 3

A parallel plate air capacitor has capacity C, distance of separation between plates is d and potential difference V is applied between the plates. Force of attraction between the plates of the parallel plate air capacitor is

• A
• B
• C
• D

Question 4

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

• A1.06 pF
• B4 pF
• C6.36 pF
• D12.72 pF

Question 5

The two spherical conductor A and B. of radii a and b(b>a) are placed concentrically in air. The two arc connected by a copper wire as shown in figure. The equivalent capacitance of the system is

• A
• B4πε₀(a+b)
• C4πε₀b
• D4πε₀a
  

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