Understanding Voltage, Current, and Resistance

What does voltage in a circuit compare to in a water flow analogy?

• The speed of the water flow

• The pressure pushing water through

• The depth of the water

• The width of the river

What does resistance in a circuit compare to in a water flow analogy?

• The color of the water

• The temperature of the water

• Obstacles in the water

• The amount of water

What is the unit of measurement for current?

• Ohms

• Volts

• Watts

• Amps

What is the effect of voltage on current in a circuit?

• Changes the direction of the current

• Decreases the current

• No effect

• Increases the current

How does adding resistance to a circuit affect the current?

• Decreases the current

• Increases the current

• Initially decreases then increases the current

• Does not affect the current

What happens in a short circuit?

• The current bypasses parts of the circuit, increasing overall

• The voltage drops to zero

• The circuit becomes more efficient

• The resistance increases dramatically

What demonstrates a higher resistance in the analogy given?

• A straw with a narrower diameter

• A wider straw

• A straw made of a different material

• A shorter straw

Why are short circuits dangerous?

• They make the circuit more complex

• They can lead to a surge in current, potentially causing fires

• They can cause the circuit to stop working

• They reduce the efficiency of the circuit

What property of materials affects their electrical conductivity?

• Temperature

• Density

• Color

• Resistance

How does voltage affect the speed of the motor in the experiment?

• No effect

• Decreases speed

• Reverses direction

• Increases speed