Electric Current
Flashcard
•
Science
•
8th Grade
•
Medium
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15 questions
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1.
FLASHCARD QUESTION
Front
What is Electric Current?
Back
Electric current is the flow of electric charge, typically measured in amperes (A). It is caused by the movement of electrons through a conductor.
2.
FLASHCARD QUESTION
Front
What is Voltage?
Back
Voltage, or electric potential difference, is the measure of the energy per unit charge available to drive the flow of current in a circuit, measured in volts (V).
3.
FLASHCARD QUESTION
Front
What is Resistance?
Back
Resistance is the opposition to the flow of electric current, measured in ohms (Ω). It depends on the material, length, and cross-sectional area of the conductor.
4.
FLASHCARD QUESTION
Front
What is Ohm's Law?
Back
Ohm's Law states that the current (I) through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R). Formula: V = I × R.
5.
FLASHCARD QUESTION
Front
How do you calculate current using Ohm's Law?
Back
To calculate current (I), use the formula: I = V / R, where V is voltage and R is resistance.
6.
FLASHCARD QUESTION
Front
What is the unit of electric current?
Back
The unit of electric current is the ampere (A).
7.
FLASHCARD QUESTION
Front
What factors affect resistance in a conductor?
Back
Resistance is affected by the material, length, cross-sectional area, and temperature of the conductor.
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