Question 1 of 10
What is the mathematical representation of Ohm's Law?
Ohm's Law is represented as V = IR and can be rearranged to R = V/I, where V is voltage, I is current, and R is resistance.
Question 2 of 10
If a resistor has a voltage drop of 12V and a current of 3A flowing through it, what is its resistance?
Using Ohm's Law (R = V/I), the resistance is 12V / 3A = 4 ohms.
Question 3 of 10
What is the unit of measurement for voltage?
Voltage is measured in Volts (V).
Question 4 of 10
What is the unit of measurement for current?
Current is measured in Amperes (A).
Question 5 of 10
What is the unit of measurement for resistance?
Resistance is measured in Ohms (?).
Question 6 of 10
If the voltage across a resistor is doubled, what happens to the current (assuming constant resistance)?
According to Ohm's law (V = IR), if V doubles and R remains constant, I must also double.
Question 7 of 10
If the resistance in a circuit is increased while the voltage remains constant, what happens to the current?
Ohm's Law: I = V/R. If R increases and V remains constant, I must decrease.
Question 8 of 10
Which of the following is NOT a factor that affects resistance?
Voltage applied does not directly affect the resistance. Resistance is dependent on the material, length, and temperature.
Question 9 of 10
What happens to the current in a circuit if a short circuit occurs (assuming a constant voltage source and negligible resistance of the short)?
A short circuit offers very low resistance. Therefore, according to Ohm's Law, the current increases drastically.
Question 10 of 10
What is the relationship between voltage and current in an ideal resistor, assuming constant temperature?
Ohm's Law states that voltage and current are directly proportional when resistance is constant.
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