Two identical conducting spheres with negligible volume have 2.1 nC and -0.1 nC charges, respectively. They are brought into contact and then separated by a distance of 0.5 m. The electrostatic force acting between the spheres is × 10-9 N [. Given: 4 π ε0=(1/9 × 109) SI unit ]

Question

Two identical conducting spheres with negligible volume have 2.1 nC and -0.1 nC charges, respectively. They are brought into contact and then separated by a distance of 0.5 m. The electrostatic force acting between the spheres is × 10-9 N [. Given: 4 π ε0=(1/9 × 109) SI unit ] (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

q =((2.1-0.1)/2) nC =1 nC f =(9 × 109 × 10-18/(0.5)2) =36 × 10-9

Q. Two identical conducting spheres with negligible volume have 2.1nC and −0.1nC charges, respectively. They are brought into contact and then separated by a distance of 0.5m. The electrostatic force acting between the spheres is _______ ×10−9N [ Given :4πε0​=9×1091​SI unit ]

q=2(2.1−0.1)​nC=1nC f=(0.5)29×109×10−18​ =36×10−9

$q = \frac{( 2.1 - 0.1 )}{2} n C = 1 n C$
$f = \frac{9 \times 1 0 ^{9} \times 1 0 ^{- 18}}{( 0.5 ) ^{2}}$
$= 36 \times 1 0^{- 9}$