What is Ohm's Law?
Electricity and Magnetism

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Science
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9th - 12th Grade
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Easy
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1.
FLASHCARD QUESTION
Front
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. The formula is I = V/R.
2.
FLASHCARD QUESTION
Front
How do you calculate voltage using Ohm's Law?
Back
Voltage (V) can be calculated using the formula V = I x R, where I is the current in Amperes and R is the resistance in Ohms.
3.
FLASHCARD QUESTION
Front
What happens to total resistance in a parallel circuit when one light goes out?
Back
The total resistance increases because there are fewer paths for the electrons to flow, leading to more backed up electrons.
4.
FLASHCARD QUESTION
Front
What is the effect on brightness of remaining lights in a parallel circuit when one light goes out?
Back
The remaining lights become dimmer because the total current is reduced as the total resistance increases.
5.
FLASHCARD QUESTION
Front
If a circuit operates at 75 Volts and has a resistance of 5 Ohms, what is the current?
Back
The current can be calculated using Ohm's Law: I = V/R = 75V / 5Ω = 15 Amps.
6.
FLASHCARD QUESTION
Front
What is the unit of electrical resistance?
Back
The unit of electrical resistance is the Ohm (Ω).
7.
FLASHCARD QUESTION
Front
What is the unit of electrical current?
Back
The unit of electrical current is the Ampere (A), often shortened to Amp.
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