Understanding Capacitors in Electronics

What is the primary function of a capacitor in an electrical circuit?

• To convert AC to DC

• To store electrical energy

• To increase current

• To decrease voltage

Which unit is used to measure the capacitance of a capacitor?

• Ohm

• Volt

• Farad

• Ampere

What happens to the charge on a capacitor when the voltage across it is doubled?

• The charge is halved

• The charge remains the same

• The charge is doubled

• The charge is quadrupled

Which of the following materials is commonly used as a dielectric in capacitors?

• Copper

• Aluminium

• Paper

• Iron

In a parallel plate capacitor, if the distance between the plates is halved, what happens to the capacitance?

• It is halved

• It remains the same

• It is doubled

• It is quadrupled

What is the formula for the energy stored in a capacitor?

Which type of capacitor is known for having a very high capacitance value?

• Ceramic capacitor

• Electrolytic capacitor

• Tantalum capacitor

• Film capacitor

What is the effect of connecting capacitors in series on the total capacitance?

• It increases

• It decreases

• It remains the same

• It becomes zero

What is the effect of connecting capacitors in parallel on the total capacitance?

• It increases

• It decreases

• It remains the same

• It becomes zero

Which of the following is a non-polarised capacitor?

• Electrolytic capacitor

• Tantalum capacitor

• Ceramic capacitor

• Supercapacitor