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NCAT Practice Test - Practice Test - Physics - Electrostatics - 2026 Quiz

Attempt 10 MCQs on NCAT Practice Test - Practice Test - Physics - Electrostatics (Year 2026) | Quiz 8

71. Find capacitance of parallel plates with area 0.01 m², separation 1 mm.



72. A 12 V battery charges a 5 μF capacitor through 10 kΩ resistor. What is voltage across capacitor after 0.1 s?



73. A 20 μF capacitor is charged to 50 V. Find stored energy.



74. A parallel plate capacitor has A=0.02 m², d=2 mm, dielectric constant κ=5. Find C.



75. Two charges in vacuum experience 8 N force. In a medium with εᵣ=4, force becomes:



76. A uniform electric field of 500 N/C exists. What distance gives a potential difference of 200 V?



77. An RC circuit has time constant 0.1 s. How long does it take to reach 50% of full charge?



78. At a point, electric field is 2000 N/C and potential is 100 V. Find the charge (k=9×10⁹).



79. Two point charges +2 μC and +8 μC are 30 cm apart. Where is the electric field zero?



80. A 4 μF and 6 μF capacitor are connected in series to a 100 V battery. Find total stored energy.



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