Podcast
Questions and Answers
If the distance between two charges is quadrupled, what happens to the force between them?
If the distance between two charges is quadrupled, what happens to the force between them?
- It increases by a factor of 2
- It decreases by a factor of 4 (correct)
- It decreases by a factor of 2
- It increases by a factor of 4
Which statement about the electric field lines due to charged particles is true?
Which statement about the electric field lines due to charged particles is true?
- They are always curved (correct)
- They are always circular
- They are always straight
- They are sometimes curved
What happens to the electric field intensity when the distance from a point charge is doubled?
What happens to the electric field intensity when the distance from a point charge is doubled?
- It increases by a factor of 2
- It decreases by a factor of 2 (correct)
- It increases by a factor of 4
- It decreases by a factor of 4
Why do charged bodies exert force on one another?
Why do charged bodies exert force on one another?
What is the correct unit of capacitance?
What is the correct unit of capacitance?
When three 15 uF capacitors are connected in series, what is the net capacitance?
When three 15 uF capacitors are connected in series, what is the net capacitance?
If three 10 uF capacitors are connected in parallel, what is the net capacitance?
If three 10 uF capacitors are connected in parallel, what is the net capacitance?
Why can alternating current flow in a capacitive circuit with AC voltage applied?
Why can alternating current flow in a capacitive circuit with AC voltage applied?
What is a common misconception about dielectric materials?
What is a common misconception about dielectric materials?
What happens to the voltage across the plates of a parallel plate capacitor when they are separated apart?
What happens to the voltage across the plates of a parallel plate capacitor when they are separated apart?
Study Notes
Electric Forces and Fields
- If the distance between two charges is quadrupled, the force between them is reduced to one-sixteenth of its original value.
Electric Field Lines
- Electric field lines due to charged particles always start from positive charges and end at negative charges.
Electric Field Intensity
- If the distance from a point charge is doubled, the electric field intensity decreases to one-fourth of its original value.
Forces between Charged Bodies
- Charged bodies exert forces on one another because they interact with each other through the electric field.
Capacitance
- The correct unit of capacitance is the Farad (F).
Capacitors in Series
- When three 15 μF capacitors are connected in series, the net capacitance is 5 μF.
Capacitors in Parallel
- When three 10 μF capacitors are connected in parallel, the net capacitance is 30 μF.
Capacitive Circuits
- Alternating current can flow in a capacitive circuit with AC voltage applied because the capacitor continuously charges and discharges.
Dielectric Materials
- A common misconception about dielectric materials is that they are conductors, when in fact they are insulators that can be polarized by an electric field.
Parallel Plate Capacitors
- When the plates of a parallel plate capacitor are separated, the voltage across the plates increases.
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Description
Test your knowledge of electrostatics with these multiple choice questions and answers. Covering topics such as electric force, electric field intensity, and lines of force due to charged particles.
