Understanding Ohm's Law

What is the basic formula of Ohm's Law?

• V = I / R

• V = I * R

• V = R / I

• V = I + R

What happens to the current when the voltage is increased?

• The current decreases

• The current fluctuates

• The current remains the same

• The current increases

How are voltage and current related according to Ohm's Law?

• They are inversely proportional

• They are directly proportional

• They are unrelated

• They are logarithmically related

What effect does increasing resistance have on current?

• It has no effect on the current

• It increases the current

• It doubles the current

• It decreases the current

How are resistance and current related?

• They are exponentially related

• They are unrelated

• They are inversely proportional

• They are directly proportional

What is the purpose of the Ohm's Law triangle?

• To solve for resistance only

• To rearrange the formula to solve for any variable

• To solve for current only

• To solve for voltage only

In the Ohm's Law triangle, what does covering the 'I' reveal?

• R / V

• V / R

• I * R

• V * R

In a parallel circuit with a 9-volt battery, what is the current through a 7-ohm resistor?

• 2.0 amperes

• 0.75 amperes

• 0.6 amperes

• 1.29 amperes

What is the resistance of a heating element if the voltage is 240 volts and the current is 13.5 amperes?

• 20 ohms

• 22 ohms

• 18 ohms

• 15 ohms

In a parallel circuit, how does the voltage across each resistor compare?

• It is half of the battery voltage

• It is double the battery voltage

• It is the same as the battery voltage

• It is different for each resistor