S2 Physics - Circuit Rules

In a series circuit, what happens to the current?

• It increases

• It remains constant

• It decreases

• It alternates

What happens to the total resistance in a series circuit when more resistors are added?

• It decreases

• It stays the same

• It increases

• It fluctuates

In a parallel circuit, what happens to the total resistance when more resistors are added?

• It increases

• It stays the same

• It decreases

• It fluctuates

Which of the following is true for a parallel circuit?

• All components share the same current

• The total resistance increases with each added resistor

• The total current is the sum of the currents through each branch

• The voltage across each branch decreases

What is Ohm’s Law equation?

• V = I * R

• V = I / R

• I = V * R

• I = V / R

If the voltage in a circuit is 12V and the resistance is 6Ω, what is the current?

• 2A

• 12A

• 18A

• 6A

What is the unit for resistance in an electrical circuit?

• Watt

• Volt

• Ohm

• Ampere

What happens to the current in a circuit if the resistance is doubled, keeping the voltage constant?

• It doubles

• It is halved

• It stays the same

• It quadruples

In a parallel circuit, if one component fails, what happens to the others?

• They all stop working

• They continue to work

• Only one stops working

• The voltage decreases

Which of the following is an advantage of using parallel circuits over series circuits?

• Increased resistance

• More efficient energy usage

• Constant current in each branch

• If one component fails, the entire circuit is affected