12th Physics , Chapter- 7, (Alternating Current ) 1. Wattless current is obtained in a circuit containing- (a) Inductor (b) Capacitor (c) (a) or (b) (d) both (a) & (b) (c) (a) or (b) Answer 2. AC generator works on the principle of- (a) Self induction (b) Photoelectric effect (c) Mutual induction. (d) None of …
12th Physics , chapter-2 ( Magnetism and Matter ) (1) Angle of dip at equator is : (a) 0° (b) 45° (c) 90° (d) 180° (a) 0° Answer (2) The vertical component of earth’s magnetic field is zero at the: (a) magnetic pole (b) magnetic equator (c) 45° latitude (d) 60° latitude (b) …
12th Physics ,Chapter-1 ( Electrostatic Potential And Capacitor ) 1) If the distance of a point from a positive charge increase, the value of the potential at the point: a. Increase b. Decrease c. may increase or decrease d. remain the same b. Decrease Answer 2) The relation between electric field E and …