There is a steel magnet if we saw it in half

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The scope of application of permanent magnets today is very wide, but the purpose of their. USREOU/ЄDRPOU code 22976428Trade supplies: permanent magnets. Title: Permanent Magnets: Reference book Author: Altman A.V. Б., Herberg A. Н., Gladyshev P. И.et al; Edited by Yu. Pyatin Publisher: “Energy” Year: 1980. Pages: 488. Abstract: The reference book provides the materials necessary for designing permanent magnets. Download the reference book on the topic “Test 11. “Permanent magnets. The magnetic field of the Earth””. Permanent magnets: Reference book 2nd ed., revised. And add.: Pyatin Yu.

Buy permanent magnets in Russia Permanent magnets are used in devices where it is necessary to create a permanent high-energy magnetic fields. For example, permanent magnets are used in the construction of small dynamic loudspeakers, magnetron traps in their magnetic systems, displacement sensors, magnetic couplings, electromechanical devices, etc. Permanent magnets are made on the basis of neodymium-iron-boron alloy. Also in the manufacture of permanent magnets, polymeric and composite materials are used. Permanent magnets possess the characteristics of high value of coercive force and high residual magnetic induction.

Permanent magnets for electrical products are products made of hard magnetic material. The permanent magnet for electrical products has a high degree of residual magnetic induction and maintains its state of magnetization for a long time. The higher the residual magnetic induction, the higher the stability of the permanent magnet for electrical products. If a magnet must have a complex shape, magnetic powder and plastic binder are used. Permanent magnets are used as autonomous sources of magnetic fields.

“Permanent magnets. The Earth’s Magnetic Field” Option 1 1.

Permanent magnets are called. Bodies that remain magnetized for a long time. Bodies made of iron or steel. Any bodies that are in a magnetic field. From the diagram, determine whether two flat magnets will interact. Do not interact.

Which magnetic poles are shown in the diagram? 1. northern, 2. southern. 1. south, 2. south.

south, 2. north. 1 North, 2 North. At which point does the magnet act on the steel ball the strongest? Everywhere the same. The north magnetic pole is located. North geographic pole. South geographic pole.

There is a steel magnet. If it is sawed in half (see the diagram on the left), the poles can be cut into two halves. Fig.), what magnetic property will have end 1 and end 2 of this magnet? Will not interact magnetically. 1. South Pole, 2. North Pole.

Walter Egan w/ Stevie Nicks. Magnet And Steel

there, steel, magnet, half

south pole, 2. south pole. 1 North Pole, 2 North Pole. 1. north pole, 2. south pole.

Identical poles of the magnet. Would not interact. Which magnetic poles are shown in the illustration? 1. north pole, 2. south pole. 1. South pole, 2. South pole. 1. south pole, 2. north pole.

1 North, 2 North. At which point would the action of the magnet on the steel ball be weakest? It is the same everywhere. The magnetic lines of the Earth’s magnetic field are directed. from geographic South Pole to geographic North Pole. From the North Geographic Pole to the South Geographic Pole.

Test 11. “Permanent magnets. Magnetic field of the Earth

А. Bodies that stay magnetized for a long time.

Б. Bodies made of iron or steel.

В. Any bodies in a magnetic field.

From the diagram, determine whether the interaction­We are going to use two flat magnets.

Which magnetic pole is depicted in the diagram below??

А. 1 is North, 2 is South.

At which point does the action of the magnet on the steel ball­of the steel ball is strongest? O O O A. 1. В. 3. Б. 2. Г. Everywhere is the same.

The magnetic North Pole is located near.

There is a steel magnet. If it is sawn in­on the head (see e.g. figure), what is the magnetic property of end 1 and end 2 of this magnet?

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Which magnetic poles are depicted in the figure?

А. 1. north, 2. south.Б. 1 is south, 2 is south.В. 1. south, 2. north.Г. 1. magnetic north, 2. magnetic north.

At what point does the action of the magnet on the steel ball­the steel ball is weakest?

The magnetic lines of the Earth’s magnetic field point­Lena.

А. From southern geographic to northern geographic­geographic pole.

Б. From the North Geographic Pole to the South Geographic Pole.

Test 11. “Permanent magnets. The magnetic field of the Earth

A steel magnet is broken into three parts (see Fig. ri­susnok). What will be the magnetic properties of the­end 1 and end 2 of this magnet?

From the diagram below, determine whether the interaction­Two planar magnets will repel the strongest.

Which magnetic poles form the magnet?­The magnetic field shown in the diagram below?

А. The same-named poles.

At what point does the action of the magnet on the steel ball­The magnetic field is the strongest?

А. Slight deviation in the direction of the Earth’s magnetic field in this area.

Б. Temporal deviation of the direction of the Earth’s magnetic field in this area.

В. A Constant and large deviation in the direction of the Earth’s magnetic field in this region.

Б. The location on the magnet where the magnetic field is strongest.

В. The place where the magnetic force of the­the magnetic field is weakest.

Determine from the figure how two planar magnets will interact­two planar magnets will interact. А. repel.

Which magnetic poles produce the magnetic field shown in the diagram??

А. With the same poles.

At what point of action of a magnet on a steel ball is weakest

The magnetic south pole is located near.

Test 11. “Permanent magnets. Earth’s magnetic field”

There is a steel magnet. If it is sawn in two halves­lamps (cf. figure), what will be the magnetic property of end 1 and end 2 of this magnet?

Which magnetic pole is shown in the diagram below??

А. 1 is north, 2 is south.

В. 1. South, 2. North. Г. 1 is north, 2 is north.

At what point does the magnet act on the steel ball­the strongest?

Do the Earth’s magnetic poles match its geo­graphic poles? А. Match.

A steel magnet is broken into three parts (see. See­cloth). What magnetic properties will the­end 1 and end 2 of this magnet will have?

How do two flat magnets interact?

Which magnetic poles are shown in the diagram?

А. 1. north, 2. south.

“Electromagnetic phenomena

1.There is a steel magnet. If it is cut in half between A and B. What will be the magnetic property of the end of A?

2.A coil is suspended on thin wires, and a permanent magnet is located nearby (see. figure). A direct current is passed through the coil and the coil is attracted to the magnet. If the magnet is turned toward the coil with its south pole

2) the coil will be repelled by the magnet

3) the coil will be attracted even more strongly to the magnet

3. A steel needle is placed between the poles of the magnet. After a while the needle is magnetized. Which poles will correspond to points 1 and 2?

4.What will happen to the magnetic arrow as the ship-permanent magnet approaches?

  • Turns clockwise 90 0
  • Turn clockwise 180 0
  • It will rotate counterclockwise by 90 0
  • Will rotate counterclockwise 180 0
5. Toward the magnetic pole (the north pole is darkened, see. figure), which can rotate around the vertical axis perpendicular to the plane of the drawing, brought a permanent magnet. In doing so, the arrow

2) will rotate clockwise by 90 0

3) will rotate 90 0 counterclockwise

6. A permanent strip magnet was brought to the magnetic arrow, which can rotate around the vertical axis perpendicular to the plane of the drawing. The arrow

2) will rotate clockwise by 90 0

3) will turn 90 0 counterclockwise

Identify the magnetic poles shown in the figure.

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9. The diagram shows an arc-shaped magnet and the magnetic field formed by it. Identify which pole of the magnet is north and which pole is south.south.

A metallic bar has been connected to a current source by means of wires. What fields will form around the rod when a current occurs in it?

The direction of the magnetic induction vector at this point in space is the same as the direction of

1) force acting on stationary charge at this point

there, steel, magnet, half

2) the force acting on a moving charge at this point

3) the north pole of a magnetic arrow placed at this point

4) the south pole of the magnetic arrow placed at this point.

Iron columns installed in Australia ,

1) are magnetized in such a way that their south pole is always at the top

2) are magnetized in such a way that their south pole is always at the bottom

3) are not magnetized because they are located in the southern hemisphere

4) they are remagnetized twice a year with the change of the Earth’s magnetic field.

3.12 Action of a magnetic field on a conductor with current

In a homogeneous magnetic field there is a frame along which a current begins to move (see figure). The force acting on the top side of the frame is directed

1) in the plane of the drawing

3) to us perpendicular to the plane of the drawing

4) from us perpendicular to the plane of the drawing

The maximum force acting in a uniform magnetic field on a 10 cm long current-carrying conductor is 0.02N. Current strength is 8A. The modulus of the magnetic induction vector of this field is

How do two conductors parallel to each other interact, if in the first case the electric current in them goes in one direction, and in the second case. in opposite directions?

1) in both cases they are attracted to each other

2) in both cases repel each other

3) in the first case attract and in the second case repel each other

4) repel each other in the first case and attract each other in the second case

In a homogeneous magnetic field, in the plane of its field lines, there is a frame in which a current flows (Fig.). The force acting on the underside of the frame is directed

1) in the plane of the drawing

3) perpendicular to the plane of the drawing toward us

4) perpendicular to the plane of the drawing away from us

How do two parallel conductors interact if the electric current in them flows in the opposite direction?

4) conductors rotate in opposite directions

11. A proton flies into a magnetic field. Determine the direction of the Lorentz force acting on the proton.
12. The picture shows a conductor with a current in a magnetic field. State the direction of the Ampere force acting on this wire.
14. The diagram shows a wire with current in a magnetic field. State the direction of the Ampere force acting on the conductor.

An electric motor works on the principle of

1) action of magnetic field on a conductor with electric current

2) electrostatic interaction of charges

4) action of electric field on electric charge.

Correspondence between technical devices and the physical phenomena underlying their principle of operation. For each item in the first column, find the corresponding item in the second column and write the numbers in the table under the corresponding letters.

TECHNICAL DEVICES PHYSICAL PHENOMENA

A) electrolysis bath 1) interaction of permanent magnets

B) direct current motor 2) the effect of a magnetic field on a wire with current

B) incandescent lamp 3) the phenomenon of electromagnetic induction

What is the relationship between the apparatus and the physical phenomena that underlie its principle of operation? For each position in the first column, identify the corresponding position in the second column and record the digits under the appropriate letters in the table.

A) COMPASS 1) Interaction of permanent magnets

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B) Electrometer 2) Electric current is produced by the action of

B) Electric motor of alternating magnetic field

4) interaction of electrified bodies

Match scientific discoveries in electrodynamics with the names of the scientists to whom these discoveries belonged. For each position in the first column, pick the corresponding position in the second column and write in the table the figures chosen under the corresponding letters.

A) interaction of two wires with current 1) X.Ersted

B) dependence of the amount of heat released- 2) D. Ohm

at a portion of an electric circuit. from its parameters 3) M. Faraday

C) the occurrence of current in a closed coil 4) E. Joule

A piece of a conductor 20 cm long is in a magnetic field with induction of 50 Tesla. The strength of the electric current flowing through the conductor is 5A. How much movement the wire will make in the direction of the Ampere force if the work of the Ampere force is equal to 0.005 J? The conductor is perpendicular to the lines of magnetic induction

A piece of conductor 10 cm long is in a magnetic field with induction of 50 mT. The strength of the electric current flowing on the conductor is equal to 10A. How much movement the conductor will make in the direction of the Ampere force, if the work of this force is equal to 0,004 J? (The conductor is perpendicular to the lines of magnetic induction.)

A section of the conductor is in a magnetic field whose induction is 50 mTl. The force of the electric current flowing through the conductor is 10 A. When moving the conductor 8 cm in the direction of the Ampere force, the field makes the work of 0.004 J. What is the length of a section of a wire?

3.13 Electromagnetic induction. Faraday’s experiments.

1.The magnetic flux through a closed coil placed in a homogeneous magnetic field depends on

1)Only the modulus of the magnetic induction vector

2)only on the angle between magnetic induction vector and the plane of the coil

4)From all three factors listed in 1)-3)

1)Deflection of a magnetic arrow when electric current flows through a wire

2)Interaction of parallel conductors with a current

3) Current in a closed coil when a magnet is placed in the coil

4)Interaction of two magnetic arrows

1) only an alternating magnetic field is produced

2)only a variable eddy electric field arises

3) Neither magnetic nor electric field

4)A magnetic alternating field also arises. and alternating vortex electric field

5.The study of the electromagnetic induction phenomenon provided the basis for the

4)laser

6. In a homogeneous magnetic field, two identical conducting frames rotate around an axis with equal frequency (see. figure). The ratio of the amplitude values of the induction current ∣ : ∣∣ generated within I and II is
7. The diagram shows two ways of rotation of a frame in a homogeneous magnetic field. Current in the frame

3) electromagnetic induction 4) universal gravitation

Which process is explained by the phenomenon of electromagnetic induction?

1) the interaction of two wires with a current

1) Appearance of an electric current in a closed coil when the current in another coil located close to the coil decreases

3)deviation of a magnetic arrow near a conductor with a current

4) occurrence of force acting on a moving charged particle in a magnetic field.

Which process is explained by the phenomenon of electromagnetic induction?

1) the attraction of an aluminum ring suspended on a thread to a permanent magnet when it is pulled out of the ring

2) repulsion of two similarly charged particles

3) deflection of magnetic arrow near a conductor with a current

4) deflection of the arrow of a voltmeter connected to the terminals of a current source.

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