Question

please help me guys it's very urgent..... please solve this both que​

Answer 1

Answer:

1 )we know electric field force F = eE = (1.6 * 10^-19 )(300) = 4.8 * 10^-17N

so option b is correct

2) v = c/√με

ε = c^2/ v^2 (μ) = 9/ 4(1.25) = 9/5 =1.8

so option d is correct