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Grade: 11
        



An electric dipole, consisting of two opposite charges of 2 × 10-6 C each separated by a distance 3 cm is placed in an electric field of 2 × 105 N/C. Torque acting on the dipole is


(a)    12 × 10-1N - m


(b)    12 × 10-2N - m


(c)    12 × 10-3N - m


(d)    12 × 10-4N - m


6 years ago

Answers : (1)

Amit Saxena
35 Points
							

(c)

Charges (q) = 2 × 10-6 C, Distance (d)

= 3 cm = 3 × 10-2 m and electric field (E)

= 2 × 105 N/C. Torque (t) = q.d.

E = (2 × 10-6) × (3 × 10-2) × (2 × 105)

= 12 × 10-3N-m.

6 years ago
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