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Quiz 3

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MDCAT - Practice Test - Physics - Electrostatics Quiz

Attempt 10 MCQs on MDCAT - Practice Test - Physics - Electrostatics | Quiz 3

21. What is the formula for capacitance?

Q/V
V/Q
Q/V²
V/Q²

22. What is the capacitance of a parallel plate capacitor?

ε₀d/A
ε₀A/d
A/(ε₀d)
d/(ε₀A)

23. What is the time constant for an RC circuit?

RC
R/C
C/R
1/(RC)

24. What is the charging equation for capacitor voltage?

V₀(1 - e^{-t/RC})
V₀ e^{-t/RC}
V₀(1 + e^{-t/RC})
V₀(1 - e^{t/RC})

25. What is the discharging equation for capacitor voltage?

V₀ e^{-t/RC}
V₀(1 - e^{-t/RC})
V₀(1 - e^{t/RC})
V₀(1 + e^{-t/RC})

26. What is the nature of force between two like charges?

Attractive for same sign
Repulsive for same sign
Always attractive
Always repulsive

27. Calculate force between 2 μC and 3 μC separated by 0.1 m (k=9×10⁹).

0.54 N
1.8 N
5.4 N
54 N

28. Find electric field at 0.2 m from a 5 μC point charge.

2.25×10⁵ N/C
5.6×10⁵ N/C
1.13×10⁶ N/C
2.25×10⁶ N/C

29. What is the electric potential at 0.2 m from a 5 μC charge?

2.25×10⁵ V
1.13×10⁶ V
4.5×10⁵ V
9×10⁵ V

30. If plate area of a capacitor is doubled, capacitance becomes:

Half
Double
Quadruple
Remains same

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