Fleming's left hand rule gives direction of MCQ with Answer and Explanation

Explanation:
Vector equilibrium: three equal forces at 120° form closed triangle. Third force equals magnitude of others, oriented 120° from each. Memory aid: 'Equilibrium: vector sum = 0; symmetric forces ⇒ symmetric angles'. Statics concept frequently tested in competitive exams.

Explanation:
M = 1 + D/f when image at near point (D = 25 cm). For infinity, M = D/f. So max at near point.

Explanation:
Pascal's law: F₁/A₁ = F₂/A₂ => F₂ = (A₂/A₁) F₁ = 10×20 = 200 N.