The energy source of the Sun is MCQ with Answer and Explanation

Explanation:
Range R = u²sin(2θ)/g = (20)²×sin(60°)/10 = 400×(√3/2)/10 = 20√3 m. Formula applies for level ground projection. Memory tip: sin(2θ) for θ=30° is sin60°=√3/2. Standard projectile calculation frequently appearing in competitive exams with trigonometric values.

Explanation:
Step-up: Ns > Np. Primary fewer turns, thicker wire because current higher on primary side (for step-up, Vp < Vs, Ip > Is).

Explanation:
g' = g (R/(R+h))² = g (1/2)² = g/4. Weight = 100/4 = 25 N.