Ohm's Law & Circuits Math Edited

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Physics
•
9th - 12th Grade
•
Hard
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15 questions
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1.
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) of the conductor. It can be expressed as V = I × R.
2.
FLASHCARD QUESTION
Front
What is the formula for calculating power in an electrical circuit?
Back
Power (P) in an electrical circuit can be calculated using the formula P = V × I, where V is the voltage and I is the current.
3.
FLASHCARD QUESTION
Front
How do you calculate the total resistance in a parallel circuit?
Back
In a parallel circuit, the total resistance (R_total) can be calculated using the formula 1/R_total = 1/R1 + 1/R2 + 1/R3 + ... for all resistors in parallel.
4.
FLASHCARD QUESTION
Front
What is the unit of electrical resistance?
Back
The unit of electrical resistance is the Ohm (Ω).
5.
FLASHCARD QUESTION
Front
If the voltage across a resistor is 12V and the resistance is 4Ω, what is the current through the resistor?
Back
Using Ohm's Law, I = V/R, the current is I = 12V / 4Ω = 3A.
6.
FLASHCARD QUESTION
Front
What happens to the total current in a parallel circuit when more resistors are added?
Back
In a parallel circuit, the total current increases as more resistors are added because each additional resistor provides an alternative path for the current.
7.
FLASHCARD QUESTION
Front
What is the relationship between voltage, current, and resistance in a circuit?
Back
The relationship is defined by Ohm's Law: V = I × R, meaning voltage is the product of current and resistance.
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