Physics class 12 questions

 1. A point charge +q, is placed at a distance d from an isolated conducting plane. The field at a point P on the other side of the plane is 

(a) directed perpendicular to the plane and away from the plane. 

(b) directed perpendicular to the plane but towards the plane. 

 (c) directed radially away from the point charge. 

(d) directed radially towards the point charge. 

2. A positively charged particle is released from rest in an uniform electric field. The electric potential energy of the charge 

(a) remains constant because the electric field is uniform. 

(b) increases because the charge moves along the electric field. 

(c) decreases because the charge moves along the electric field. 

(d) decreases because the charge moves opposite to the electric field. 

3. Which of the following characteristics of electrons determine the current in a conductor? 

 (a) Drift velocity alone 

 (b) Thermal velocity alone 

 (c) Both drift velocity and thermal velocity 

 (d) Neither drift nor thermal velocity