Question 3
A positively-charged particle (alpha-particle) projected towards west is deflected towards north by a magnetic field. The direction of magnetic field is
(a) towards south
(b) towards east
(c) downward
(d) upward
Question 3
A positively-charged particle (alpha-particle) projected towards west is deflected towards north by a magnetic field. The direction of magnetic field is
(a) towards south
(b) towards east
(c) downward
(d) upward
Correct Option: (d)
The direction of current is opposite to the direction of electron's movement and hence it would be same as the direction of proton's movement. So, the direction of current is towards west. As per Fleming's Left-Hand Rule, the middle finger shows the direction of current, the forefinger shows the direction of magnetic field and the thumb shows the direction of motion. Here, the deflection is towards north i.e., towards north-west direction and hence, the direction of the magnetic field would be towards north i.e., upward.
Correct Option: (d)
The direction of current is opposite to the direction of electron's movement and hence it would be same as the direction of proton's movement. So, the direction of current is towards west. As per Fleming's Left-Hand Rule, the middle finger shows the direction of current, the forefinger shows the direction of magnetic field and the thumb shows the direction of motion. Here, the deflection is towards north i.e., towards north-west direction and hence, the direction of the magnetic field would be towards north i.e., upward.
