Question

Examine the scenario.

A stream of positively-charged particles is moving to the left in a magnetic field. The particles experience an upward force.

Which choice most accurately describes the effect on the magnetic field on a stream of negatively-charged particles moving to the left?

A magnetic field influences the motion of charged particles. The negatively-charged particles will experience a force upward because positive and negative particles would experience a force in the same direction.

A magnetic field influences the motion of charged particles. The negatively-charged particles will experience a force acting against their motion, so the negatively-charged particles would slow down and stop moving.

A magnetic field does not influence the motion of negatively-charged particles. The particles would continue to move to the left.

A magnetic field influences the motion of charged particles. The negatively-charged particles will experience a force downward because positive and negative particles would experience forces in opposite directions.

Answer 1

The answer is "A magnetic field influences the motion of charged particles. The negatively-charged particles will experience a force acting against their motion, so the negatively-charged particles would slow down and stop moving."

This is because for example;

Have you ever seen a magnet? If so, you would experience the same scienario as above.

Answer 2

option (c)

Step-by-step explanation:

According to the Fleming's left hand rule, if we spread out thumb, fore finger and middle finger of our left hand mutually perpendicular to each other, then thumb represents the direction of force, fore finger represents the direction of magnetic field and the middle finger represents the direction of current.

According to the question, positive charge particle moves in left wards direction, i.e., current is flowing towards left, the force is acting upwards, so the direction of magnetic field is in perpendicular outwards to the plane of paper.

When a negatively charged particle moves towards left , then the direction of force is downwards.

Thus, the magnetic field influences the motion of charged particles. The negatively-charged particles will experience a force downward because positive and negative particles would experience forces in opposite directions.