Question

a sphere of mass 50 gm is suspended by a string in an electric field of intensity 5N/C acting vertically upward.if the tension in the string is 520 milli newton,the charge on the sphere is​

Answer 1

hope it helps...

W-T-F=0 ( at equilibrium)

Answer 2

Answer:

The charge on the sphere is​ $-6\times10^{-3}\ C$.

Explanation:

Given that,

Mass of sphere = 50 gm

Intensity = 5 N/C

Tension = 520 mN

We need to calculate the weight

$W = mg$

$W=50\times10^{-3}\times9.8$

$W=0.49\ N$

We need to calculate the force

Using formula of intensity

$F=qE$

Put the value into the formula

$F=5q$

We need to calculate the charge on the sphere

Using balance equation

$W-T-F=0$

Put the value in the equation

$0.49-520\times10^{-3}-5q=0$

$q=-0.006\ C$

$q=-6\times10^{-3}\ C$

Hence, The charge on the sphere is​ $-6\times10^{-3}\ C$.