Electricity and Magnetism

What is a magnetic field?

• A magnetic field is a type of electric current.

• A magnetic field is a solid object that attracts metals.

• A magnetic field is a measure of temperature in a material.

• A magnetic field is a region where magnetic forces can be observed.

How do you represent magnetic field lines?

• Magnetic field lines are represented as straight lines from east to west.

• Magnetic field lines are represented as continuous curves from north to south poles, indicating direction and strength.

• Magnetic field lines are depicted as circles around the magnetic source.

• Magnetic field lines are shown as dotted lines with no direction.

What is the purpose of a resistor in a circuit?

• To limit current and control voltage in a circuit.

• To convert electrical energy into heat.

• To store electrical energy for later use.

• To increase current flow in a circuit.

How do electromagnets work?

• Electromagnets operate by spinning a magnet at high speeds to generate electricity.

• Electromagnets work by using permanent magnets to create a magnetic field.

• Electromagnets work by generating a magnetic field through electric current in a coil of wire.

• Electromagnets function by heating metal to produce magnetism.

What is the effect of increasing current on an electromagnet's strength?

• Increasing current increases the strength of the electromagnet.

• Increasing current only affects the size of the electromagnet.

• Increasing current has no effect on the strength of the electromagnet.

• Increasing current decreases the strength of the electromagnet.

What is the role of a switch in an electric circuit?

• To increase the voltage in a circuit.

• The role of a switch is to control the flow of electricity in a circuit by opening or closing the circuit.

• To convert electrical energy into mechanical energy.

• To store electrical energy for later use.

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

• The total resistance fluctuates randomly.

• The total resistance increases.

• The total resistance decreases.

• The total resistance remains the same.

Which of the following does not conduct electricity?

• gloves
• penny
• paper clip
• key

Electricity is the flow of ______.

• electrons
• protons
• neutrons
• atoms

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

The force of magnetism is stronger when magnets are ________________

• cold
• round
• closer together
• farther apart

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