Electricity unit

Flashcard
•
Science
•
8th - 9th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is resistance in an electrical circuit?
Back
Resistance is a measure of the opposition to the flow of electric current, measured in ohms (Ω).
2.
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). It can be expressed as V = I × R.
3.
FLASHCARD QUESTION
Front
What is the unit of electric current?
Back
The unit of electric current is the ampere (A).
4.
FLASHCARD QUESTION
Front
What is the difference between series and parallel circuits?
Back
In a series circuit, components are connected end-to-end, so the same current flows through all components. In a parallel circuit, components are connected across the same voltage source, allowing multiple paths for current.
5.
FLASHCARD QUESTION
Front
What happens to the total resistance in a series circuit?
Back
The total resistance in a series circuit is the sum of the individual resistances: R_total = R1 + R2 + R3 + ...
6.
FLASHCARD QUESTION
Front
What happens to the total resistance in a parallel circuit?
Back
The total resistance in a parallel circuit is less than the smallest individual resistance and can be calculated using the formula: 1/R_total = 1/R1 + 1/R2 + 1/R3 + ...
7.
FLASHCARD QUESTION
Front
What is a generator?
Back
A generator is a device that converts mechanical energy into electrical energy.
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