Question

The value of charge on a body which carries 30 excess electrons is

• A. 4.8 × 10 ^-19 C
• B. 4.8 × 10 ^-18 C
• C. 4 × 10 ^-18 C
• D. 48 × 10 ^-18 C

Answer 1

The correct option is B

4.8 × 10 ^-18 C

Here, n = 30 q =?

e = - 1.6 × 10 ^-19 C

So, q = n × e = 30 (-1.6 × 10^-19 C)

q = - 4.8 × 10 ^-18 C