Question for waves 2

10. Slit separation = 1/6000 cm = 1.667x10^-4 cm = 1.667x10^-6 m
hence, max order = 1.667x10^-6/450x10^-9 = 3.7
hence, max order = 3

11-12: Statements A and B are wrong

13. Statement C is correct.
Force is proportional to charge and inversely proportional to square of distance.
Hence, four times the charge on Z is cancelled by 2 times longer in distance.

14. Statement C is correct.
When the rod is brought near, X and Y are induced opposite charges. Since X carries +ve charge, Y should carry -ve charge.

The spheres X abd Y are originally neutral, hence X and Y should carry equal and opposite charges.