NEET 2020 Revision: Electric Potential and Capacitance- 02 (23.02.2020)

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Question 1

As shown in the figure, assume that there are two capacitors, one of them circular and the other square shaped. If the distance between the two plates is same i.e. x and the radius of circular plate is r and the length of the square plates r/2, then find the relation between their capacitance.

• AC_square = 4πC_circ
• BC_circ = 4πC_square
• CC_circ = 2πC_square
• DC_square = 4πC_circ

Question 2

In an experiment of making a supercapacitor, scientists designed a parallel plate capacitor using two triangular plates each having of base 2 cm and altitude of 4 cm. What will be the charge on each plate if, the potential difference of 1000 V is applied when the plates are separated by 2 mm?

• A1 × 10⁻⁷ C
• B2.2125 × 10⁻⁷ C
• C4.425 × 10⁻⁷ C
• D8.85 × 10⁻⁷ C

Question 3

Find the total energy of the system if the capacitance of each capacitor is 4 µC.

• A98 µJ
• B134.75 µJ
• C52.77 µJ
• D61.25 µJ

Question 4

Find the equivalent capacitance between points A and B if every capacitor is of 2 mF.

• A7.267
• B5.667
• C1.667
• D5

Question 5

A toy car is propelled by using energy of 2 capacitors each of 100μF and charged to 3 kV. At what maximum speed can this car move if its mass is 2 Kg?

• A60 m/s
• B20 m/s
• C30 m/s
• D40 m/s

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