{{asɛmtiNe Ɔkyerɛwfo}} | Nhomakorabea | Nneɛma a ɛma wotumi yɛ ade

4

Study the diagram of an electromagnet. Identify what each component does in the circuit.

Draggable item		Corresponding Item
_____ Becomes a temporary magnet		F
_____ Provides the pathway to carry the electricity from component to component		A
_____ Controls the flow of electricity by opening and closing the circuit		E
_____ Has potential energy to run the circuit		C

2

You can’t see electricity when it is flowing. You need to have some other kind of evidence.
Check each statement that describes evidence that electricity is flowing.

_____ A component gets hot.

_____ A motor in a circuit is not moving.

_____ The switch is closed.

_____ A lightbulb shines.

1

Which circuit will light the bulb?

A

B

C

D

1

What is the energy source in the circuits shown above?

The bulb filament

The bulb casing

The wire

The D-cell (battery)

1

A student set a compass on top of a wire not yet connected in a circuit. When she connected the
wire to the positive side of the D-cell, the compass needle moved.
Why did the compass needle change position when the circuit was closed?

When the circuit is complete, electricity also runs through the compass.

The magnetic poles of the D-cell reversed, causing the compass needle to move.

The compass-needle change indicates the potential energy in the D-cell.

A magnetic field surrounds a wire when electric current flows through it.

2

Check each statement that describes where electricity flows in an
electromagnet. Leave the box blank if the statement does not describe where electricity flows.

Electricity flows through the rivet (core).

Electricity flows through the wire wrapped around the core.

Electricity flows through the switch when it is closed.

Electricity flows through the plastic insulation on the wire.

0

A group of students from another class wanted to improve their electromagnet design. Starting
with the standard design that everyone used in class, they decreased the number of winds on the
core and added three more batteries. Then they tested their new design. Their electromagnet
could pick up more paper clips than the original design. They recorded the following
conclusion:
The fact that our modified electromagnet picked up more paper clips tells us that
less winds and more batteries are both ways to make an electromagnet stronger.
Evaluate this group’s investigation and explain to them why you agree or why you disagree with
their conclusion.

Electromagnetic Force Investigation 3 I-Check

Electromagnetic Force Investigation 3 I-Check

Study the diagram of an electromagnet. Identify what each component does in the circuit.

You can’t see electricity when it is flowing. You need to have some other kind of evidence.
Check each statement that describes evidence that electricity is flowing.

Which circuit will light the bulb?

What is the energy source in the circuits shown above?

A student set a compass on top of a wire not yet connected in a circuit. When she connected the
wire to the positive side of the D-cell, the compass needle moved.
Why did the compass needle change position when the circuit was closed?

Check each statement that describes where electricity flows in an
electromagnet. Leave the box blank if the statement does not describe where electricity flows.

Study the diagram of an electromagnet. Identify what each component does in the circuit.

You can’t see electricity when it is flowing. You need to have some other kind of evidence.
Check each statement that describes evidence that electricity is flowing.

Which circuit will light the bulb?

What is the energy source in the circuits shown above?

A student set a compass on top of a wire not yet connected in a circuit. When she connected the
wire to the positive side of the D-cell, the compass needle moved.
Why did the compass needle change position when the circuit was closed?

Check each statement that describes where electricity flows in an
electromagnet. Leave the box blank if the statement does not describe where electricity flows.

Electromagnetic Force Investigation 3 I-Check

Electromagnetic Force Investigation 3 I-Check

Study the diagram of an electromagnet. Identify what each component does in the circuit.

You can’t see electricity when it is flowing. You need to have some other kind of evidence.Check each statement that describes evidence that electricity is flowing.

Which circuit will light the bulb?

What is the energy source in the circuits shown above?

A student set a compass on top of a wire not yet connected in a circuit. When she connected thewire to the positive side of the D-cell, the compass needle moved.Why did the compass needle change position when the circuit was closed?

Check each statement that describes where electricity flows in anelectromagnet. Leave the box blank if the statement does not describe where electricity flows.

Study the diagram of an electromagnet. Identify what each component does in the circuit.

You can’t see electricity when it is flowing. You need to have some other kind of evidence.Check each statement that describes evidence that electricity is flowing.

Which circuit will light the bulb?

What is the energy source in the circuits shown above?

A student set a compass on top of a wire not yet connected in a circuit. When she connected thewire to the positive side of the D-cell, the compass needle moved.Why did the compass needle change position when the circuit was closed?

Check each statement that describes where electricity flows in anelectromagnet. Leave the box blank if the statement does not describe where electricity flows.

You can’t see electricity when it is flowing. You need to have some other kind of evidence.
Check each statement that describes evidence that electricity is flowing.

A student set a compass on top of a wire not yet connected in a circuit. When she connected the
wire to the positive side of the D-cell, the compass needle moved.
Why did the compass needle change position when the circuit was closed?

Check each statement that describes where electricity flows in an
electromagnet. Leave the box blank if the statement does not describe where electricity flows.

You can’t see electricity when it is flowing. You need to have some other kind of evidence.
Check each statement that describes evidence that electricity is flowing.

A student set a compass on top of a wire not yet connected in a circuit. When she connected the
wire to the positive side of the D-cell, the compass needle moved.
Why did the compass needle change position when the circuit was closed?

Check each statement that describes where electricity flows in an
electromagnet. Leave the box blank if the statement does not describe where electricity flows.