Ohm’s Law
Physics ⇒ Electricity and Magnetism
Ohm’s Law starts at 8 and continues till grade 12.
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See sample questions for grade 8
If the resistance in a circuit is halved and the voltage remains the same, what happens to the current?
If the voltage across a resistor is doubled, what happens to the current (assuming resistance is constant)?
What is Ohm’s Law?
A student claims that doubling the length of a wire will double its resistance, assuming all other factors remain constant. Is this statement true or false? Explain your answer.
A student connects a 9 V battery to a resistor and measures a current of 0.3 A. What is the resistance of the resistor?
A student measures a current of 0.4 A through a resistor when a voltage of 2 V is applied. What is the resistance?
A student uses a 10 Ω resistor in a circuit with a 5 V battery. What is the current in the circuit?
A 6 V battery is connected to a resistor, and a current of 0.5 A flows. If the resistance is increased to 24 Ω, what will be the new current?
Ohm’s Law is applicable to which type of materials?
(1) Only metals
(2) Only insulators
(3) Ohmic conductors
(4) All materials
Which of the following devices is most likely to obey Ohm’s Law?
(1) Light bulb
(2) Resistor
(3) Diode
(4) Transistor
Which of the following equations correctly represents Ohm’s Law?
(1) V = I × R
(2) V = R / I
(3) V = I + R
(4) V = I - R
Which of the following is a correct statement about Ohm’s Law?
(1) It is only valid for superconductors.
(2) It is only valid for ohmic materials.
(3) It is valid for all materials.
(4) It is only valid for insulators.
Fill in the blank: Ohm’s Law is named after the scientist __________.
Fill in the blank: The current in a circuit is __________ proportional to the voltage, according to Ohm’s Law.
Fill in the blank: The formula for current using Ohm’s Law is I = __________.
Fill in the blank: The resistance of a conductor is __________ proportional to its cross-sectional area.
True or False: According to Ohm’s Law, if the resistance increases and the voltage remains the same, the current will decrease.
True or False: Ohm’s Law can be used to calculate the resistance of a component if the voltage and current are known.
True or False: Ohm’s Law can be used to calculate the voltage, current, or resistance if the other two quantities are known.
True or False: Ohm’s Law can be written as I = V / R.
