Magnetism Grade 9B

The correct picture of the magnetic field pattern at the two poles of the following bar magnets is

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A wire is flowing with a current of 4,5 A, which is directed to the west on a two-dimensional plane. The length of the wire is 120 cm, find the direction and amount of the magnetic field formed, if the Lorentz force is 27 N and the direction is out of the reading plane.

Which is paramagnetic materials

• Sand

• Lead

• Gold

• Copper

Which statement is correct

• Magnet always has west and north poles

• Opposite poles of magnets attract each other

• Like two equal magnetic poles attracting each other

• Two magnetic north poles attract each other

On a three-dimensional plane, the center of the earth indicates the direction in which the reading plane enters. If a 65 cm wire is electrified by x A, so that it forms a magnetic field of 10 T coming out of the reading plane, and the lorentz force formed is 39 N towards the east of the earth. Find the direction and the amount x

• 0,3 T, East

• 0,3 T, West

• 6 T, North

• 6 T, East

In a wire that has an electric field, electrons are flowed so that an electric field of 25 N / C is formed. Find the amount of electric force that is formed in the area of the rod

• 2.5 x 10^-18 N
• 5.0 x 10^-19 N
• 1.0 x 10^-16 N

• 4.0 x 10^-18 N

A wire with a current of 5.5 A towards the center of the earth forms a magnetic field 30 T that points north of the earth. If the length of the wire is 60 cm, find the direction and amount of the Lorentz force.

• 9,9 N North

• 9,9 N West

• 9,9 N South

• 9,9 N East

A way for the magnetic field to be concentrated, and stronger, can be done by?

• Soaking magnets in salt water

• Makes less copper turns in the conductor

• Improved by windingthe conductors to form coil

• Cutting the bar magnet into two pieces

A wire is supplied with a current that causes a lorentz force of 144 N, Calculate how much the electric field on the rod is?

A Lorentz force of 125 N is formed on a wire with an electric current of 5 A. This causes a magnetic field of 50 T. Find the size of the wire, and the amount of electric field formed on the wire.

• 0,5 m and 72,825 x 10^-18 N/C

• 5 m and 72,825 x 10^-18 N/C

• 50 cm and 78,125 x 10¹⁹ N/C

• 50 m and 72,825 x 10¹⁹ N/C