Capacitor calculations - Basic calculations for capacitors in series and parallel

This video tutorial covers basic capacitor calculations in DC circuits, focusing on electrolytic and ceramic capacitors. It explains how capacitors charge and discharge, and provides formulas for calculating charge and energy. The video also explores the behavior of capacitors in parallel and series configurations, and introduces the concept of time constants and exponential charging curves.

What is a key characteristic of an electrolytic capacitor?

• It is always larger than ceramic capacitors.

• It is polarized and has a specific positive and negative side.

• It can be connected in any direction.

• It is non-polarized.

How is the charge stored in a capacitor calculated?

• Charge equals voltage divided by capacitance.

• Charge equals capacitance multiplied by voltage.

• Charge equals capacitance divided by voltage.

• Charge equals voltage squared.

What happens when capacitors are connected in parallel?

• The total capacitance is the sum of individual capacitances.

• The total capacitance decreases.

• The voltage across each capacitor is different.

• The total charge is divided among capacitors.

In a parallel circuit with a 9V battery and capacitors, what is the voltage across each capacitor?

• 0 volts

• 4.5 volts

• 9 volts

• 18 volts

How is the total capacitance of capacitors in series calculated?

• By adding the capacitances together.

• By taking the reciprocal of the sum of reciprocals of individual capacitances.

• By multiplying the capacitances.

• By subtracting the smallest capacitance from the largest.

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

• It doubles the total capacitance.

• It has no effect on the total capacitance.

• It decreases the total capacitance.

• It increases the total capacitance.

What is a time constant in an RC circuit?

• The time it takes for a capacitor to fully discharge.

• The time it takes for a capacitor to charge to 63.2% of the supply voltage.

• The time it takes for a resistor to reach maximum resistance.

• The time it takes for a circuit to reach equilibrium.

How many time constants does it take for a capacitor to charge to nearly full voltage?

• 3 time constants

• 5 time constants

• 10 time constants

• 1 time constant

What happens to the current in a circuit as a capacitor charges?

• The current remains constant.

• The current increases.

• The current decreases.

• The current fluctuates.

What is the voltage across a capacitor after one time constant during discharge?

• 63.2% of the initial voltage

• 100% of the initial voltage

• 0% of the initial voltage

• 36.8% of the initial voltage