Question

Cathode rays travelling in the direction from east to west enter in an electric field directed from north to south. They will deflect in _________ .(A) east
(B) west
(C) south
(D) north

Answer 1

Answer:

(B) south

Explanation:

The reason is that the cathode rays are negatively charged and will deflect towards the south

Answer 2

They will deflect in (D) north.

Explanation:

• Cathode rays are produced by discharge tube under certain condition.
• Cathode rays are electron rays which is negatively charged.
• We know that the positive charge attract negative charge and vice versa.
• When the cathode rays move across the electric field then its direction is deflected and moves in opposite direction.
• Thus, the electric field moves from north to south, the opposite of south is north. So, the cathode rays move towards north direction.