Snap Circuits 3

What is the unit of electrical resistance?

• ampere

• ohm

• watt

• volt

The purpose of a resistor in an electrical circuit is to limit the flow of current and control voltage levels.

• True

• False

The main difference between a parallel and series circuit is the way the components are connected and how the current flows through them.

• True

• False

The relationship between voltage, current, and resistance in a circuit is given by Ohm's law: V = I * R.

• True

• False

How does an LED (Light Emitting Diode) work?

• LEDs work by absorbing light when an electric current passes through them.

• LEDs work by producing sound when an electric current passes through them.

• LEDs work by generating heat when an electric current passes through them.

• LEDs work by emitting light when an electric current passes through them.

Which unit is used to measure electrical resistance?

• volt (V)

• ohm (Ω)

• ampere (A)

• joule (J)

Ohm's law is given by the formula V = IR, which means the voltage in a circuit is equal to the product of the current and the resistance.

• True

• False

What happens to the total resistance in a parallel circuit as more resistors are added?

• Total resistance becomes negative

• Total resistance remains the same

• Total resistance decreases

• Total resistance increases

The current flows through each resistor in sequence, with the same value of current passing through each one.

• True

• False

What are the safety precautions to be taken when working with electricity?

• Working with electricity in wet conditions

• Ignoring warning signs or labels

• Wearing appropriate PPE, ensuring proper grounding, using insulated tools, and being cautious around live wires or electrical panels.

• Using damaged or frayed electrical cords