help me to my homework please.!PLEASe PLEASE.
TRUE or FALSE
1.the north pole of a permanent magnet is attracted to a south pole
2.iron,aluminum, and nickel are all ferromagnetic materials
3.all permanent magnets are surrounded by a magnetic field
4.the direction of a magnetic field is indicated by the north pole of a compass.
5.magnets are used to amplify sound of a loudspeaker
6.magnetic field lines outside a permanent magnet originate from the north pole and end on the south pole.
7.when a permanent magnet is cut in half,one piece will be a north pole and one piece will be a south pole
8.the magnetic force on a charged particle in a magnetic field is a maximum if the particle is stationary
9.the magnitude of the magnetic force that acts on a charged particle in a magnetic field is independent of the sign of the charge
10.a charged particle is moving in a uniform,constant magnetic field.the magnetic force exerted on the particle increases the speed of the particle.
11.a proton traveling due east in a region that contains only a magnetic field experiences a vertically upward force away from the surface of the earth (the x-y plane).the direction of the magnetic field is towards north.
12.an electron traveling due north enters a region that contains a uniform magnetic field that points due east will be deflected down (onto the plane).
13.a proton is traveling south as it enters a region that contains a magnetic field.it is deflected downward toward the earth (the plane) if the direction of the magnetic field is westward.
14.an electron traveling horizontally enters a region where a uniform magnetic field is directed into the plane of the paper as shown.the motion of the electron once it has entered the field is upward and circular.
[x x x x x]
.--->
[x x x x x]
[x x x x x]
[x x x x x]
15.two electrons are located in a region of space where the magnetic field is zero. electron A is at rest; and electron B is moving westward with a constant velocity. A non-zero magnetic field directed eastward is then applied to the region. after the field is applied electron A will remain at rest while electron B will continue to move westward.
16.an electron is moving with a speed of 3.5x10^5 m/s along +x axis when it encounters a magnetic field of 0.60T. the direction of the magnetic field makes an angle of 60.0 degree with respect to the velocity of the electron, onthe same plane. the magnetic force on the electron is 2.9x10^-14 N, out of the plane.
17.a long,straight wire carries a 6.0-A current that is directed in the positive x direction. when a uniform magnetic field is applied perpendicular to a 3.0 m segment of the wire,the magnetic force on the segment is 0.36 N,directed in the negative Y direction. the magnitude and direction of the magnetic field 0.020 T, onto the plane.
18.a current-carrying, rectangular coil of wire is placed is placed in a magnetic field. the magnitude of the torque on the coil is not dependent to the direction of the current in loop.
A wire is bent into the shape of a circle of radius=0.10m and carries a 20.0A current in the direction shown.
20.0A
-->
CIRCLE
r
^ / ^
| ./ |
<--
19.the direction of the magnetic field at the center of the loop is onto the plane.
20.the magnitude of the field at the center of the loop is 1.3x10^4T.
1. True
2. True
3. True
4. False
5. False
6. True
7. False
8. False
9. True
10. False
11. False
12. True
13. True
14. False
15. True
16. True
17. True
18. False
19. True
20. False
Sure! I'd be happy to help you with your homework. Here are the answers to the True or False questions:
1. TRUE. The north pole of a permanent magnet is indeed attracted to a south pole.
2. TRUE. Iron, aluminum, and nickel are all examples of ferromagnetic materials.
3. TRUE. All permanent magnets are indeed surrounded by a magnetic field.
4. TRUE. The direction of a magnetic field is indicated by the north pole of a compass.
5. FALSE. Magnets are not used to amplify the sound of a loudspeaker, they are used in the construction of the loudspeaker.
6. TRUE. Magnetic field lines outside a permanent magnet do indeed originate from the north pole and end on the south pole.
7. FALSE. When a permanent magnet is cut in half, each piece will have its own north and south pole.
8. FALSE. The magnetic force on a charged particle in a magnetic field is maximum when the particle is moving perpendicular to the field.
9. TRUE. The magnitude of the magnetic force on a charged particle is independent of the sign of the charge.
10. FALSE. The magnetic force exerted on a charged particle in a magnetic field can change its direction of motion, not its speed.
11. TRUE. A proton traveling due east in a magnetic field pointing towards the north will experience a vertically upward force away from the surface of the earth.
12. FALSE. An electron traveling due north in a magnetic field pointing due east will be deflected up (out of the plane).
13. TRUE. A proton traveling south in a magnetic field pointing west will be deflected downward toward the earth.
14. TRUE. An electron traveling horizontally in a magnetic field that points into the plane of the paper will move upward and in a circular path.
15. FALSE. After the magnetic field is applied, both electrons will experience a force and change their motion.
16. FALSE. Without the given value for the angle between the magnetic field and the velocity of the electron, it is not possible to determine the magnitude and direction of the magnetic force.
17. TRUE. The magnitude and direction of the magnetic field are indeed 0.020 T, onto the plane.
18. FALSE. The torque on a current-carrying coil depends on the direction of the current in the loop.
19. TRUE. The direction of the magnetic field at the center of the loop is indeed onto the plane.
20. FALSE. Without additional information, it is not possible to determine the magnitude of the magnetic field at the center of the loop.
I hope this helps! Let me know if you have any other questions.
To determine whether each statement is true or false, we can use our knowledge of magnets and magnetic fields. Let's go through each statement one by one:
1. True. The north pole of a permanent magnet is attracted to a south pole. This is because opposite magnetic poles attract each other.
2. True. Iron, aluminum, and nickel are all ferromagnetic materials, meaning they can be magnetized and have strong magnetic properties.
3. True. All permanent magnets are surrounded by a magnetic field. The magnetic field is the region around a magnet where its influence can be detected.
4. True. The direction of a magnetic field is indicated by the north pole of a compass. The compass needle aligns itself with the magnetic field lines, pointing towards the magnetic south pole.
5. False. Magnets are not used to amplify sound in a loudspeaker. They are used in speakers to convert electrical signals into sound vibrations.
6. True. Magnetic field lines outside a permanent magnet originate from the north pole and end on the south pole, forming closed loops.
7. False. When a permanent magnet is cut in half, each piece will have its own north and south poles. Cutting a magnet does not result in creating separate north and south poles.
8. False. The magnetic force on a charged particle in a magnetic field is maximum when the particle's velocity is perpendicular to the magnetic field, not when it is stationary.
9. True. The magnitude of the magnetic force that acts on a charged particle in a magnetic field is independent of the sign of the charge. The direction of the force, however, depends on the charge's velocity and the magnetic field's direction.
10. False. The magnetic force exerted on a charged particle in a magnetic field can change its direction, but it does not change its speed. The force acts perpendicular to the particle's velocity, resulting in circular motion.
11. True. A proton traveling due east in a region with a magnetic field pointing towards the north will experience an upward force away from the surface of the earth. This is due to the interaction between the magnetic field and the charged particle's velocity.
12. False. An electron traveling due north in a region with a magnetic field pointing due east will be deflected upwards, not downwards, from the plane.
13. False. If a proton is traveling south and is deflected downward, the magnetic field's direction cannot be determined based on this information alone.
14. True. An electron entering a region where a uniform magnetic field is directed into the plane of the paper will experience an upward and circular motion due to the interaction between its velocity and the magnetic field.
15. False. Since both electrons are negatively charged, when a non-zero magnetic field is applied, both will experience a force opposite to the direction of their velocity, causing them to slow down and eventually come to rest.
16. False. Without knowing the charge of the electron, we cannot determine the direction of the force exerted by the magnetic field on the electron.
17. False. Without knowing the length of the wire segment and the angle between the magnetic field and the wire, we cannot determine the magnitude and direction of the magnetic field.
18. False. The torque on a current-carrying, rectangular coil of wire placed in a magnetic field depends on the direction of the current in the loop. Changing the direction of the current changes the direction of the torque.
19. True. At the center of the loop, the magnetic field is directed onto the plane.
20. False. The magnitude of the field at the center of the loop cannot be determined without additional information about the dimensions and current in the loop.
Please note that magnetic fields can be complex, and some statements may require additional context or information to determine their accuracy.