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Question: true or false 1 the earths magnetic field is created...

Question details

True or False

1. The Earth’s magnetic field is created by a huge magnetic bar inside the Earth.

2. The Earth’s magnetic field is created by ions and electrons (charges) circulating in the liquid Earth’s core, acting like a loop of current.

3. A static charge in a magnetic field will experience a force.

4. Only moving charges can experience force due to a magnetic field.

5. Both positive and negative charges moving in the same direction in a magnetic field will experience force in the same direction.

6. Two positive charges moving in opposite directions in a magnetic field will experience force in the same direction.

7. A positive charge and a negative charge moving opposite directions on the plane perpendicular to the magnetic field will experience magnetic force in the same direction.

8. The magnetic force is proportional to the B field strength, the amount of charge as well as the speed of the charged particle.

9. If the velocity vector of the charge makes an angle θ with the B field, the magnetic force is proportional to cos θ.

10. When the charge moves along the direction of the B field, it receives no magnetic force.

11. When the charge moves along the direction of the B field, it receives the maximum magnetic force.

12. The magnetic force is along the direction of the charge’s velocity.

13. The magnetic force is perpendicular to both the B field direction and the charge’s velocity; hence it is proportional to the plane formed by the velocity and B field vector.

14. When the velocity and B field are perpendicular to each other, the magnetic force is zero.

15. When the velocity and B field are perpendicular to each other, the magnetic force is maximized.

16. When a charge moves inside a steady B field, the B field will not do work on the charge, because the magnetic force is perpendicular to its motion direction.

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