Gravitation

JEE Main level, single correct, medium

29 of 223

Question 29 of 223

Match List‐I‐I (Event) with List‐II‐II (Order of the time interval for the happening of the event) and select the correct option from the options given below the lists. List-I List-II (a)(a) The rotation period of earth (i)(i) 105s{10}^{5}s (b)(b) Revolution period of earth (ii)(ii) 107s{10}^{7}s (c)(c) Period of a light wave (iii)(iii) 10−15s{10}^{-15}s (d)(d) Period of a sound wave (iv)(iv) 10−3s{10}^{-3}s

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Answer: (A) (a)‐(i)(a)‐(i), (b)‐(ii)(b)‐(ii), (c)‐(iii)(c)‐(iii), (d)‐(iv)(d)‐(iv)

The duration of the day 86400s≃105s86400s≃{10}^{5}s
revolution period 365days≃107s365days≃{10}^{7}s
For the light of λ=6000\lambda =6000 A0{A}^{0}, time period≃10−15s≃1{0}^{-15}s and
for the sound wave time period≃10−3s≃1{0}^{-3}s

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