Physics 7.2.1

Question 1

What is Produced Around a Conducting Wire when a Current Flows Through it?

Answer 1

When a Current Flows Through a Conducting Wire, a Magnetic Field is Produced Around the Wire.

Question 2

What is a ‘Conducting Wire’?

Answer 2

A Conducting Wire is any Wire that has a Current Flowing Through it. (made of magnetic material eg iron, cobalt, for an electromagnet.)

Question 3

What Piece of Equipment Can be Used to Investigate the Shape & Direction of Magnetic Fields Produced by Conducting Wires?

Answer 3

Plotting Compass.

Question 4

To Increase the Strength of the Magnetic Field Around the Conducting Wire, it Should be Coiled to Form a…

Answer 4

Solenoid.

Question 5

The Magnetic Field Around a Solenoid is Similar to that of a…

Answer 5

Bar Magnet.

Question 6

If the Current in a Solenoid is Travelling Clockwise, then it is the ___ Pole.

Answer 6

South.

Question 7

If the Current in a Solenoid is Travelling Anticlockwise, then it is the ___ Pole.

Answer 7

North.

Question 8

If the Current Through a Conducting Wire (in Solenoid Form) Changes Direction, what will happen?

Answer 8

The North & South Poles will be Reversed.

Question 9

The Strength of the Magnetic Field Produced Around a Solenoid can be Increased by: (3)

Answer 9

-Increasing the Size of the Current which is Flowing Through the Wire.

-Increasing the Number of Turns in the Coil.

-Adding an Iron Core Through the Centre of the Coils.

Question 10

What happens to the Iron Core when it is Added to a Solenoid?

Answer 10

The Iron Core will Become an Induced Magnet when Current is Flowing Through the Coils.

Question 11

What is an ‘Electromagnet’?

Answer 11

An Electromagnet is a Conducting Wire that has a Current Flowing Through it, which Forms a Magnetic Field Around it.

Question 12

The Magnetic Field Produced by an Electromagnet can be…

Answer 12

Switched On / Off.

Question 13

The Strength of an Electromagnet can be Changed by: (2)

Answer 13

-Increasing the Current will Increase the Magnetic Field Produced Around the Electromagnet.

-Decreasing the Current will Decrease the Magnetic Field Produced Around the Electromagnet.

Question 14

Electromagnets are Conducting Wires with Current. They can be Strengthened by Coiling it into a ___. This can be Further Strengthened by Adding an ___ ___. These are all still Electromagnets.

Answer 14

Solenoid, Iron Core.

Question 15

Electromagnets with Iron Cores are still…

Answer 15

Electromagnets. It is like a Sub-Category of Electromagnets.