Resistors and Electrical Circuits

How do resistors affect current in an electric circuit?

• They decrease the current.

• They increase the current.

• They have no effect on current.

• They stop the current completely.

What is the primary function of resistors in an electrical circuit?

• To increase voltage

• To store electrical energy

• To resist the flow of current

• To convert electrical energy into light

What unit is used to measure electrical resistance?

• Volts (V)

• Ohms (Ω)

• Amperes (A)

• Watts (W)

According to Ohm’s law, what happens to current if resistance is increased, keeping voltage the same?

• Current becomes zero

• Current increases

• Current remains the same

• Current decreases

What physical property of resistors determines their ability to resist current flow?

• Their material and length

• Their color code

• Their shape

• Their weight

How does the control knob in a radio circuit affect the sound you hear from the speakers?

• It changes the shape of the speakers.

• It changes the resistance in the circuit and affects the sound.

• It stops the current flow completely.

Tags

NGSS.HS-PS4-5

Which wire has more resistance, a thicker wire or a thinner wire?

• Thicker wire has more resistance.

• Thinner wire has more resistance.

• Both have the same resistance.

• It depends on the length of the wire.

How does the length of a wire affect its resistance?

• Both have the same resistance

• Shorter wires have higher resistance

• Length does not affect resistance

• Longer wires have higher resistance

How could you find out if a resistor uses up any electrical energy?

• By using Ohm’s law

• By observing its color

• By measuring its length

• By touching it to see if it heats up

How was the relationship between voltage and current for a constant resistance shown on your graph?

• A zig-zag pattern

• A straight line

• A curve

• A circle