Tiêu đề DPP-3 SOLUTION.pdf ✅

A = (2 ∆a a + 3 ∆b b + ∆c c + 1 2 ∆d d ) × 100% = 2 × 1 + 3 × 3 + 2 + 1 2 × 2 = 2 + 9 + 2 + 1 = 14% 16 (a) The unit of 1 2 εE 2 = C 2 Nm2 ( N C ) 2 = C 2 Nm2 N 2 C 2 = N m2 = Nm m3 = J m3 =energy density 17 (d) v = at + bt 2 [v] = [bt 2 ] or LT −1 = bT 2 ⇒ [b] = [LT −3 ] 18 (b) 6 × 10−5 = 60 × 10−6 = 60 microns 19 (b) Surface tension = Force Length = newton/metre 20 (d) C = 1 √μ0ε0 ⇒ 1 μ0ε0 = c 2 = [L 2T −2 ]
ANSWER -KEY Q. 1 2 3 4 5 6 7 8 9 10 A. B D D B D B D C C D Q. 11 12 13 14 15 16 17 18 19 20 A. C A B D A A D B B D