S2 Physics - Current, Potential Difference and Resistance

What is the unit of current?

• Volt

• Ampere

• Ohm

• Watt

What does Ohm’s law state?

• Voltage = Current x Resistance

• Resistance = Current x Voltage

• Current = Voltage x Resistance

• Voltage = Resistance / Current

How does increasing resistance in a circuit affect the current?

• It increases the current

• It decreases the current

• It has no effect

• It causes a short circuit

What does Ohm’s law describe?

• The relationship between voltage, current, and resistance

• The relationship between mass and acceleration

• The relationship between force and distance

• The relationship between power and energy

Which of the following will increase the current in a circuit?

• Increase resistance

• Decrease voltage

• Decrease resistance

• Decrease temperature

What is the unit of resistance?

• Volt

• Ampere

• Ohm

• Watt

Which component is necessary for a simple circuit?

• Battery

• Switch

• Resistor

• All of the above

What happens to the energy in a circuit?

• It is transferred and converted into other forms

• It is lost as heat

• It is stored in the wires

• It remains unchanged

What happens when the resistance is doubled in a circuit with constant voltage?

• The current is halved

• The current is doubled

• The current remains the same

• The current stops

What is the main purpose of a fuse in a circuit?

• To increase current

• To prevent overheating

• To store energy

• To change the voltage