Capacitors - Factors

Capacitors - Factors

12th Grade

10 Qs

quiz-placeholder

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Capacitors - Factors

Capacitors - Factors

Assessment

Quiz

Physics

12th Grade

Easy

Created by

Amy Webber

Used 1+ times

FREE Resource

10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

The insulating layer of a capacitor is called the

plate

conductors

dielectric

terminals

Answer explanation

The insulating layer of a capacitor is called the dielectric. It separates the conductive plates and allows the capacitor to store electrical energy without conducting current.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The capacitance of a parallel-plate capacitor can be increased by: 

increasing the charge 

decreasing the charge 

increasing the plate separation

decreasing the plate separation 

Answer explanation

The capacitance of a parallel-plate capacitor is given by C = ε(A/d), where A is the area and d is the plate separation. Decreasing the plate separation (d) increases capacitance, making it the correct choice.

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

How is the capacitance of a parallel-plate capacitor affected by the distance between the plates ?

C is directly proportional to the area A of each plate

C is inversely proportional to the distance d between the plates

C is partially proportional to the area A of each plate

C is not affected by the area A of each plate

Answer explanation

The capacitance C of a parallel-plate capacitor is given by C = ε(A/d), where A is the area of the plates and d is the distance between them. This shows that C is inversely proportional to d, meaning as the distance increases, capacitance decreases.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If C is the capacitance in Farads, ϵ permittivity of the dielectric, A area of plate overlap in square meters and d distance between plates in meters, then:

C = ϵd/A 

C = A/ϵd

C = ϵA/d

C = d/ϵA

Answer explanation

The capacitance C of a parallel plate capacitor is given by the formula C = ϵA/d, where ϵ is the permittivity, A is the area of overlap, and d is the distance between the plates. Thus, the correct choice is C = ϵA/d.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The following are factors affecting capacitance, except.

Dielectric in between the metal plates

Area  of the metal plates

Distance of separation of the metal plates

Voltage across the metal plates

Answer explanation

Capacitance is affected by the dielectric material, area of the plates, and the distance between them. The voltage across the plates does not affect capacitance; it influences the charge stored instead.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to the capacitance if the area of the plates in a parallel-plate capacitor is doubled?

It is halved

It remains the same

It is doubled

It is quadrupled

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following statements is true about the relationship between capacitance and permittivity?

Capacitance is directly proportional to permittivity

Capacitance is not affected by permittivity

Capacitance is inversely proportional to permittivity

Capacitance is exponentially related to permittivity

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