Physics Exercise 9C Part 1 TA 2324

The properties of magnets, namely: attract ​ (a)   , have ​ (b)   poles, point in the North-South direction when suspended, the like poles ​ ​ (c)   and unlike poles ​ ​ (d)   and the greatest magnetic attraction lies at ​ (e)   .

• repel
• attract
• magnetic materials
• both poles
• two
• non magnetic materials

The way to make the magnet can be divided into three methods, namely: making the magnet using the ​ (a)   , magnetic induction, and the flow of electric current with ​ (b)   . The last method is to make ​ (c)   . We can test the strength of the electromagnet we can use a magnet to lift the metal clip. The number of metal clips lifted by the magnet is ​ (d)   proportional to the strength of the magnet.

• stroke method
• direct current (DC)
• Alternating Current (AC)
• electromagnets
• directly
• inversly

Look at the following picture! The image above shows three bar magnets. If C is the south pole, B and C attract, and D and E repel, then the types of magnetic poles in A and F are...

• A south pole, F north pole

• A north pole, F south pole

• A south pole of a magnet can attract all metals

• A south pole, F south pole

Two nails stick together due to magnetic induction from the north pole of a bar magnet as shown in the following picture. Determine the corresponding magnetic poles A-B-C-D...

• S - S - S - S

• S - N - S - N

• N - S - N - S

• N - N - S - S

The poles of a bar magnet in a free state always point ​ (a)   the north and south of the earth. The location of the earth's magnetic south pole is around the earth's ​ (b)   pole. The location of the earth's magnetic north pole is around the earth's ​ (c)   pole.

• towards
• north
• south
• not towards

A bar magnet is cut into three magnets. If magnet A forms the same poles as the original magnet, namely South and North, then magnets B and C respectively are ...

• N-S, S-N

• N-S, N-S

• S-N, N-S

• S-N, S-N

Determine the pole of points A-B-C-D for the following picture!

• S-S-N-N

• S-N-S-N

• N-S-N-S

• N-N-S-S

A 50 cm long wire is inside a magnetic charge. If the electric current flowing in the wire is 5,000 milli Amperes, then the Lorentz force is 25 N, and the magnitude of the magnetic field is...

• 40 T 

• 20 T

• 10 T

• 30 T

A device has a magnetic field strength of 5 T and a wire of 100 cm so that it produces a Lorentz force of 80 N. So the current strength used by the device is

• 4 A

• 16 A

• 8 A

• 2 A

The following is a picture of an electrical device that uses magnets. The correct direction of the Lorentz force is …

Note : Utara = North*

• to the top

• enter of the paper plane

• down

• exit of the paper plane