Parallel-Plate Capacitors – numerical worksheet
In this post, we have presented a collection of numerical problems on Parallel-plate capacitors in the form of a numerical worksheet. This is good for grade 11 and grade 12 students.
Parallel-Plate Capacitors – worksheet | numerical problems
Q1 ) A synthetic sweater becomes statically charged by friction. The sweater and the skin beneath it act as a 75 nF capacitor. The person wearing the sweater comes into contact with a conducting surface that carries away the charge stored in the capacitor by producing a 240 mV spark.
How much charge was stored in the capacitor?
How many excess electrons were stored by the sweater? e = 1.6×10-19 C
Q2 ) An 12.5 µF parallel plate capacitor stores 1000 µC of charge. What is the potential difference across its plates?
Q3 ) A 675 µF parallel plate capacitor has a potential difference of 25 V across its plates. What charge does the capacitor store?
Q4 ) At the instant when the current through the resistor in the circuit shown in the diagram is 0.5 A, what charge is stored by the 20 µF capacitor in the circuit?
![](https://physicsteacher.in/wp-content/uploads/2022/05/image-54.png)
Q5 ) The capacitor in the circuit shown in the diagram stores a charge of 3 mC. What is the potential difference V across the resistor?
![](https://physicsteacher.in/wp-content/uploads/2022/05/image-55.png)
Q6 ) A parallel-plate capacitor has square plates with sides 25 cm long, 2.5 cm apart. Find the capacitance of the capacitor.
Use the value 8.85×10-12 C2/N⋅m2 for the permittivity of the space between the plates.
Q7 ) A 2.1 nF parallel plate capacitor has square plates with sides 15 cm long, 1.5 cm apart. Find the permittivity of the space between the plates.
Q8 ) A parallel plate capacitor has square plates with sides 25 cm long, 7.5 mm apart. The potential difference across the plates is 25 V and the permittivity of the space between the plates is 8.85×10-12 C2/N⋅m2. What is the charge stored by the capacitor?
Q9 ) A parallel plate capacitor has square plates with a 2.25 V/m uniform electric field between them. The permittivity of the space between the plates is 1.10×10-11 C2/N⋅m2. What is the charge density of the plates?
Solutions: coming soon