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Question: Calculate the tension in the thread during equilibrium condition- ![](https://cdn.pureessence.tech/...

Calculate the tension in the thread during equilibrium condition-

A

8.8 N

B

8.8 × 102 N

C

8.8 × 10–4 N

D

8.8 × 10–3 N

Answer

8.8 × 10–4 N

Explanation

Solution

During equilibrium

T cos q = mg

T sin q = qE

T =

T =(80×10×10−6)2+(2×10−8×2×104)2\sqrt { \left( 80 \times 10 \times 10 ^ { - 6 } \right) ^ { 2 } + \left( 2 \times 10 ^ { - 8 } \times 2 \times 10 ^ { 4 } \right) ^ { 2 } }

T =64×10−8+16×10−8\sqrt { 64 \times 10 ^ { - 8 } + 16 \times 10 ^ { - 8 } }

T =80×10−8\sqrt { 80 \times 10 ^ { - 8 } }= 8.8 × 10–4 N