Free Printable Flemings Left Hand Rule

Worksheets

Flemings Left Hand Rule

Total questions: 19

Worksheet time: 19mins

Name

Class

Date

In Flemings Left hand rule what does the thumb point in the direction of?

The direction of the magnetic field

The direction of the current

The direction of the force (movement)

None of these

The current in the green wire flows from the left to the right. What direction does the wire move?

Down

Into the page

Out of the page

The strength of the magnetic field produced by a flowing current in a wire is affected by:

The size of the Current

The distance from the wire

The number of coils of wire

All 3

What should the blanks be?
When a wire carrying an electric current is placed in a ________________, it may experience a force. The field from the fixed magnet ___________ with the field due to the current. This can cause the wire to be attracted or repelled from the fixed magnet you will see the effect of the attraction/repulsion in the ___________of the wire.

magnetic field, interacts, movement

electric field, interacts, movement

magnetic field, interacts, vibration

circuit, interacts, movement

What will happen when these magnets are brought close together?

They will attract each other.

They will repel each other.

Both magnets will turn to the left

Both magnets will turn to the right

Magnets have a north and a south ___________

shape

color

pole

region

Which of the following is true about a bar magnet?

Its magnetic field is strongest near its center.

It is surrounded by a magnetic field.

The north pole is stronger than the south pole.

The south pole is stronger than the north pole.

How is an electromagnet different from a permanent magnet?

An electromagnet is smaller and less powerful.

An electromagnet's magnetism can be turned off.

An electromagnet can be built without using metal.

An electromagnet does not attract objects containing iron.

In Flemings Left Hand Rule, in what direction does the second (middle) finger point? (The first finger is the one by your thumb

The direction of movement

The direction of the magnetic field

The direction of electrical current

The direction of electron flow

10.

A __________ is an electrical device that converts AC electricity from one voltage level to another

transformer

primary coil

secondary coil

center tap

11.

Step-up transformers...

improve the efficiency of the national grid

reduce the voltage to a safe level for the home

increase resistance

are better than the Autobots

12.

Step-down transformers...

improve the efficiency of the national grid

reduce the voltage to a safe level for the home

both

13.

Thumb and first finger represent .......

magnetic field, force

force, current

force, magnetic field

current, force

14.

The diagram show the direction of magnetic field,B and current, I.

By using Fleming left hand rules, determine the direction of Magnetic force, F.

left

downward

into the page

out from the page

15.

The diagram show the direction of magnetic field,B and current, I.

By using Fleming left hand rules, determine the direction of Magnetic force, F.

no force produced

downward

into the page

out from the page

16.

The diagram show the direction of magnetic field,B and current, I.

By using Fleming left hand rules, determine the direction of Magnetic force, F.

no force produced

right

into the page

out from the page

17.

The diagram show the direction of magnetic field,B and current, I.

By using Fleming left hand rules, determine the direction of Magnetic force, F.

no force produced

right

downward

out from the page

18.

The diagram shows a cross-section through a simple DC motor. Select the correct statement:

The loop will rotate clockwise

The loop will rotate anticlockwise

The slip rings aid commutation

The loop rotates the same way even if the battery is reveresed

19.

If a conductor is wound into a coil and a current is passed through it creating a magnetic field, what is it known as?

Bar Magnet

Solenoid

Polarnoid

Transformer

Reset

Flemings Left Hand Rule

Total questions: 19

Worksheet time: 19mins

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