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Questions and Answers
What constitutes an electric current?
What constitutes an electric current?
- The movement of charges in a steady manner. (correct)
- The oscillation of positive and negative charges.
- The random motion of particles in a conductor.
- The static accumulation of charges.
Which scenario best illustrates a non-steady electric current?
Which scenario best illustrates a non-steady electric current?
- Flow of charges through a fixed resistor.
- Flow of charges in a torch.
- Flow of charges during lightning. (correct)
- Flow of charges in a battery-operated clock.
How is the net amount of charge flowing in the forward direction defined?
How is the net amount of charge flowing in the forward direction defined?
- It is the total positive charge minus total negative charge.
- It is the total charge divided by the time interval.
- It is the sum of both positive and negative charges in a given interval.
- It is the difference between net positive charge and reverse flow of negative charge. (correct)
What is the relationship between the net amount of charge and time for a steady current?
What is the relationship between the net amount of charge and time for a steady current?
In which application is charge flow typically considered steady?
In which application is charge flow typically considered steady?
Flashcards
Electric Current
Electric Current
The movement of electric charges, often in a steady flow like water in a river.
Charge flow
Charge flow
The net amount of charge flowing across a given area in a specific time interval.
Steady Current
Steady Current
A type of electric current where the flow of charges is constant over time.
Lightning
Lightning
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Everyday device with steady current
Everyday device with steady current
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Study Notes
Chapter Three: Current Electricity
- Charges in motion constitute an electric current
- Lightning, a natural phenomenon, involves charge flow
- Many everyday devices (like torches and clocks) show steady current flow
- This chapter studies steady electric currents
3.2 Electric Current
- Imagine a small area perpendicular to charge flow
- Positive and negative charges can flow forward and backward
- q₁ is the net forward positive charge flow
- q₂ is the net forward negative charge flow
- Net charge flow (q) = q₁ - q₂
- q is proportional to time (t) for steady current
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