Two tiny particles having charges +20.0 C and -8.00 C are separated by a distanc

Question

Two tiny particles having charges +20.0 C and -8.00 C are separated by a distance of 20.0 cm. What are the magnitude and direction of electric field midway between these two charges? (k = 1/40 = 9.0 × 109 N • m2/C2)

Two tiny particles having charges +20.0 C and -8.00 C are separated by a distance of 20.0 cm. What are the magnitude and direction of electric field midway between these two charges? (k = 1/40 = 9.0 × 109 N • m2/C2)

25.2 × 105 N/C directed towards the negative charge 25.2 × 104 N/C directed towards the negative charge 25.2 × 106 N/C directed towards the positive charge 25.2 × 106 N/C directed towards the negative charge 25.2 × 105 N/C directed towards the positive charge

Explanation / Answer

q1 = 20 uC, q2 = -8 uC, d = 20 cm, r =10 cm

E= kq/r^2

E = (9*10^9*20*10^-6/(0.1*0.1)) +(9*10^9*8*10^-6/(0.1*0.1))

E = 25.2*10^6 N/C towards negative charge

Correct option is (d)

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