Question

three charges 1 microcoulomb, 1 microcoulomb and 2 microcoulomb are kept at the vertices A B and C of a equilateral triangle ABC of 10cm side respectively the resultant force on the charge at c is?

Answer 1

q1 = 1μC = 10⁻⁶C

q2 = 1μC = 10⁻⁶C

q3 = 2μC = 2 x 10⁻⁶ C

r = 10 cm = 10 x 10⁻² m

Force on charge q3 due to charge q1

F(q3)(q1) = K 2(10⁻⁶)(10⁻⁶)100 / 10

F(q3)(q1) = 9 x  2 x 10⁹ x 10⁻¹² x 10² = 9 x 10⁻¹ = 1.8 N

Force on charge q3 due to charge due to charge q2

F(q3)(q2) = 1.8 N

Net force on charge q3

F(net) = √(1.8)²+ (1.8)² + 2(1.8)(1.8) cos60

F(net) = √(1.8)²( 1 + 1 + 2 x 1/2 )

F(net) = 1.8 √3 N

Answer 2

Heya there ,

your answer is given below :