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Electrical Engineering Practice Test: Capacitance and Capacitors
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Capacitance and Capacitors topics include: Capacitors, charge and voltage, capacitance, capacitors in parallel and series, electric fields, electric flux density, relative permittivity, composite dielectric capacitor, charging and discharging currents, growth and decay, CR networks transients, dielectric strength and displacement current, capacitor and capacitance types.  Capacitance is the ability of a circuit or component to store and collect energy in the form of an electrical charge. Capacitors are devices that store energy and come in many shapes and sizes.  The capacitance of a... Show more
Electrical Engineering Practice Test: Capacitance and Capacitors
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25 Questions

1. What is the equivalent capacitance?
Find the equivalent capacitance from the given diagram
2. Two capacitors having capacitance value 4F, three capacitors having capacitance value 2F and 5 capacitors having capacitance value 1F are connected in parallel, calculate the equivalent capacitance.
3. Calculate the charge in the 1F capacitor.
Find the charge in the 2F capacitor from the given diagram
4. What happens to the capacitance of a multi plate capacitor when the distance of separation between the plate increases?
5. Calculate the actual permittivity of a medium whose relative permittivity is 5.
6. An 8microF capacitor is connected in series with a 0.5 megaohm resistor. The DC voltage supply is 200V. Calculate the voltage in the capacitor 4s after the power is supplied.
7. What happens to the capacitance when a dielectric is introduced between its plates?
8. Energy stored in 2000mF capacitor charged to a potential difference of 10V is?
9. A metal parallel plate capacitor has ‘a’mm diameter and the distance between the plates is 1mm. The capacitor is placed in air. Force on each plate is 0.035N and the potential difference between the plates is 1kV. Find ‘a’.
10. Four 10F capacitors are connected in series, calculate the equivalent capacitance.
11. Find the capacitance of a multi plate capacitor whose actual permittivity= 5F/m, n=3, A=4m2and d=2m.
12. Which of the following depends on charging and discharging rate of a capacitor?
13. A power factor of a circuit can be improved by placing which, among the following, in a circuit?
14. What is the relation between current and voltage in a capacitor?
15. The electric field strength is 10N/C and the thickness of the dielectric is 3m. Calculate the potential drop in the dielectric.
16. The expression for the current in an RC circuit is?
17. What happens to the potential difference between the plates of a capacitor as the thickness of the dielectric slab increases?
18. Calculate the voltage across the 2F capacitor.
Find the capacitors connected in series from the given diagram
19. If the switch is closed at t=0, what is the current in the circuit?
Find the current in circuit when switch is closed from the given diagram
20. Which is the correct expression for capacitance of a multi plate capacitor?
21. What happens to the current flow in a fully charged capacitor?
22. Capacitors charge and discharge in __________ manner.
23. What is the relative permittivity when the actual permittivity is 4F/m?
24. A circuit has a resistance of 5 ohm connected in series with a capacitance of 10F. Calculate the discharging time constant.
25. The force applied to a conductor is 10N if the charge in the conductor is 5C, what is the electric field intensity?