A uniform magnetic field is directed vertically upwards. In which direction in this field should an alpha particle (which are positively charged) be projected so that it is deflected southward? Name and state the rule you have used to find the direction in this case.
Answers
Answer:
The magnetic field is directed vertically upward. So the velocity is directed towards the east. Therefore the alpha particle should be projected towards east.
Explanation:
An alpha particle has positive charge.
The Lorentz force is given by
F→=qv→×B→
For simplicity, you can take a right hand thumb rule. Curl your right hand fingers from the direction of v to B. Stretch out the thumb, the thumb gives the direction of the force.
The force towards south (the particle is deflected towards south).
The magnetic field is directed vertically upward. So the velocity is directed towards the east.
Therefore the alpha particle should be projected towards east.
I have used the expression for Lorentz force and the rule for vector multiplication.
Answer:
The magnetic field is directed vertically upward. So the velocity is directed towards the east. Therefore the alpha particle should be projected towards east.
Explanation:
An alpha particle has positive charge.
The Lorentz force is given by
F→=qv→×B→
For simplicity, you can take a right hand thumb rule. Curl your right hand fingers from the direction of v to B. Stretch out the thumb, the thumb gives the direction of the force.
The force towards south (the particle is deflected towards south).
The magnetic field is directed vertically upward. So the velocity is directed towards the east.
Therefore the alpha particle should be projected towards east.
I have used the expression for Lorentz force and the rule for vector multiplication.