8. An electric dipole of moment p⃗ is placed in a uniform electric field E⃗. Then (i) the torque on the dipole is p⃗ ×E→ (ii) the potential energy of the system is p⃗ .E→ (iii) the resultant force on the dipole is zero. Choose the correct option. (a) (i), (ii) and (iii) are correct (b) (i) and (iii) are correct and (ii) is wrong (c) only (i) is correct (d) (i) and (ii) are correct and (iii) is wrong

answer; /// i believe that the correct answer is (c)

magnityde and direction

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day

-4 on