A 6 V battery is connected to a 3 Ω resistor. Current is MCQ with Answer and Explanation

Explanation:
(1/2)ⁿ = 1/32 ⇒ 2ⁿ = 32 ⇒ n = 5 half-lives. Exponential decay calculation. Memory aid: '1/2ⁿ remaining; 1/32 = 1/2⁵ ⇒ 5 half-lives'. Radioactivity arithmetic frequently tested in competitive exams.

Explanation:
Gamma rays are EM waves, no mass/charge, highly penetrating, least ionising. Alpha has highest ionising power.

Explanation:
Q = mL = 50 × 80 = 4000 cal. (1 cal = 4.2 J, but here in cal). No temperature change during phase change. Latent heat of vaporization is 540 cal/g for water.