Experts pls help me to solve 46 -

Dear student,

Here,

m = 80 mg = 8 × 10-5 kg

q = 0.02 µC = 2 × 10-8 C

E = 20000 V/m

Now,

In equilibrium condition,

T sinθ = qE

T cosθ = mg

So, (T sinθ)2 + (T cosθ)2 = (qE)2 + (mg)2

=> T2 = (2 × 10-8 × 20000)2 + (8 × 10-5 × 9.8)2 = 0.00000077

=> T = 0.00088 N

Regards

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