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Shortcut used: Choose the governing electricity or magnetism relation, convert prefixes to SI units, and check sign, direction, and dimensions.
Solve in 3 steps:
- Mark the given values and the exact target.
- Apply the relevant formula, rule, or concept.
- Check the final value against the options.
Common mistake: Do not choose an option before confirming the exact demand of the question.
Question 8
Multiple Choice Question
Question
A 4.0 Ω resistor is connected across a 12 V ideal battery. What current passes through the resistor?
Explanation
Correct Answer: D
ANSWER
Correct Answer: D
Method / Topic: Electricity
Ohm's law gives I = V/R = 12/4.0 = 3.0 A.
Why this answer is correct
The correct option matches the required rule and the given information.
Short Explanation
Ohm's law gives I = V/R = 12/4.0 = 3.0 A.
Detailed Explanation
Question
A 4.0 Ω resistor is connected across a 12 V ideal battery. What current passes through the resistor?
ANSWER
Correct Answer: D
Method / Topic: Electricity
Ohm's law gives I = V/R = 12/4.0 = 3.0 A.
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Question 8
Learn + Solve: Shortcut, Trap & Fast Route Click to view shortcut, steps, and common mistake
Learn + solve
Shortcut used, common trap, and the fastest solving route
Shortcut used: Choose the governing electricity or magnetism relation, convert prefixes to SI units, and check sign, direction, and dimensions.
Solve in 3 steps:
- Mark the given values and the exact target.
- Apply the relevant formula, rule, or concept.
- Check the final value against the options.
Common mistake: Do not choose an option before confirming the exact demand of the question.
Question
A 4.0 Ω resistor is connected across a 12 V ideal battery. What current passes through the resistor?
Explanation
Correct Answer: D
ANSWER
Correct Answer: D
Method / Topic: Electricity
Ohm's law gives I = V/R = 12/4.0 = 3.0 A.
Why this answer is correct
The correct option matches the required rule and the given information.
Short Explanation
Ohm's law gives I = V/R = 12/4.0 = 3.0 A.
Detailed Explanation
Question
A 4.0 Ω resistor is connected across a 12 V ideal battery. What current passes through the resistor?
ANSWER
Correct Answer: D
Method / Topic: Electricity
Ohm's law gives I = V/R = 12/4.0 = 3.0 A.
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Concept tagged
convert prefixes to SI units
and check sign
direction
and dimensions.
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