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- 1. Multiple Choice
When 3 capacitors are arranged in series , the equivalent capacitance C is
Ceq = C1 + C2 + C3
1/Ceq = 1/C1 + 1/C2 + 1/C3
Ceq = QV1 + QV2 + QV3
Ceq = CR1 + CR2 + CR3
- 2. Multiple Choice
When 3 capacitors are arranged in parallel , the equivalent capacitance is
Ceq = C1 + C2 + C3
Ceq = 1/C1 + 1/C2 + 1/C3
C = QV1 + QV2 + QV3
1/Ceq = 1/C1 + 1/C2 + 1/C3
- 3. Multiple Choice
The energy stored in the capacitor can be find by using this equation EXCEPT
1/2QV
1/2Q2/C
1/2CV2
1/2RC2
- 4. Multiple Choice
During charging a capacitor through a resistor
the current in the circuit increases linearly with time
the current in the circuit decreases linearly with time
the current in the circuit increases exponentially with time
the current in the circuit decreases exponentially with time
- 5. Multiple Choice
During discharging a capacitor through a resistor
the current in the circuit increases linearly with time
the current in the circuit decreases linearly with time
the current in the circuit increases exponentially with time
the current in the circuit decreases exponentially with time
- 6. Multiple Choice
How is the capacitance of a parallel-plate capacitor affected by the potential difference across the capacitor ?
C depend on the potential difference across the capacitor
C does not depend on the potential difference across the capacitor
C partially depend on the potential difference across the capacitor
C sometime depend on the potential difference across the capacitor
- 7. Multiple Choice
How is the capacitance of a parallel-plate capacitor affected by the area of each plate?
C is directly proportional to the area A of each plate
C is inversely proportional to the area A of each plate
C is partially proportional to the area A of each plate
C is fully proportional to the area A of each plate
- 8. Multiple Choice
How is the capacitance of a parallel-plate capacitor affected by the distance between the plates ?
C is directly proportional to the distance d between the plates
C is inversely proportional to the distance d between the plates
C is not affected by the a distance d between the plates
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- 9. Multiple Choice
How is the capacitance of a parallel-plate capacitor affected by filling the space between the plates with an insulator ?
C stable when the space between the plates is filled with an insulator, εr >1
C reduces when the space between the plates is filled with an insulator, εr >1
C increases when the space between the plates is filled with an insulator, εr >1
C fluctuate when the space between the plates is filled with an insulator, εr >1
- 10. Multiple ChoiceThe capacitance of a parallel-plate capacitor is:proportional to the plate areaproportional to the charge storedindependent of any material inserted between the platesproportional to the potential difference of the plates
- 11. Multiple ChoiceThe capacitance of a parallel-plate capacitor can be increased by:increasing the chargedecreasing the chargeincreasing the plate separationdecreasing the plate separation
- 12. Multiple Choice------------------------ is created out of two metal plates and an insulating material called a dielectric.An inductorA capacitorA fixed resistorA variable resistor
- 13. Multiple ChoiceA dielectric slab is slowly inserted between the plates of a parallel plate capacitor while the capacitor is connected to a battery. As it is being inserted:the capacitance and the charge on the plate increase but the potential difference between the plates remains the samethe capacitance and the charge on the positive plate decrease but the potential difference between the plates remains the samethe potential difference between the plates increases, the charge on the positive plate decreases, and the capacitance remains the samethe capacitance, the potential difference between the plates, the charge on the positive plate all decrease
- 14. Multiple Choice
What happens to the atoms in a dielectric when it is placed between the plates of a charged capacitor?
They begin to conduct electricity.
They create an electric field that is in the opposite direction of the field due to the charges on the plates.
They create an induced electric field that is in the same direction as the field due to the charges on the plates.
They completely cancel the electric field due to the charges on the plates.
- 15. Multiple ChoiceWhat is the symbol for dielectric permeativity.εεrε0εrε0
- 16. Multiple Choice
Which is the Q vs t graph for the charging process of a capacitor?
a
b
neither
both
- 17. Multiple ChoiceIf the capacitor is CONNECTED to the battery, what remains constant if the area of the metal plates is increased?Voltage across the metal platesCapacitanceCharge stored in the capacitorEnergy stored in the capacitor
- 18. Multiple Choice
Capacitor stores _______________
Charge
Voltage
Energy
Money.. Lots of money
- 19. Multiple Choice
Charge is measured in_________
Coulombs
Farads
Hz
Volts
- 20. Multiple Choice
Capacitance is measured in___________
Coulombs
Farads
Hz
Volts
- 21. Multiple ChoiceThe symbol for the relative permittivity is:εrε0εsεv
- 22. Multiple Choice
The symbol for the vacuum permittivity is:
εr
ε0
εs
εv
- 23. Multiple Choice
εr ,ε, ε0 are related to each other according to the following equation:
εr = ε / ε0
εr = ε0 / ε
εr = ε × ε0
ε0 = εr / ε
- 24. Multiple Choice
In RC circuit, and when charging the capacitor, the time constant (τ) is the time needed for the charge of the capacitor to reach ----------- of its maximum charge.
50%
63%
86%
37%
- 25. Multiple ChoiceIn the RC circuit, the time constant (τ) for the circuit is:τ = R × Cτ = R / Cτ = C × Rτ = R2 × C
- 26. Multiple Choice
In the RC discharging circuit, time constant (τ) is the time taken by the charge of the capacitor to reach ---------------- of the initial charge.
63%
37%
50%
67%
- 27. Multiple Choice
Which graph best represents the current versus time in the circuit?
A
B
C
D
E
- 28. Multiple Choice
What is a capacitor?
A device for storing energy.
A device for storing p.d.
A device for storing charge.
A device for storing capacitance.
- 29. Multiple Choice
As you charge up a capacitor, what happens to the current through it
Increases
Decreases
Stays the same
Fluctuates
- 30. Multiple Choice
What happens when a parallel plate capacitor is charged with d.c.
Electrons move away from the plate attached to the negative terminal
Electrons move away from the plate attached to the positive terminal
Protons move away from the plate attached to the negative terminal
Protons move away from the plate attached to the positive terminal
- 31. Multiple Choice
What happens to the charge in a capacitor during the discharging process?
Increases over time
Decreases over time
Remains the same
I dont know
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