A. for open pipes, there is only one end correction to be accounted for B. for closed pipes, there are…
A. 14Hz B. 18Hz C. 28Hz D. 56Hz Correct Answer: Option C C. 28Hz
A. Ultra-violet rays B. gamma rays C. x-rays D. radio waves Correct Answer: Option D D. radio waves
A. the final image is inverted B. it is shorter than terrestrial telescope C. the final image is erect D.…
A. 10cm B. 12cm C. 50cm D. 60cm Correct Answer: Option B B. 12cm
A. 19º B. 21º C. 39º D. 42º Correct Answer: Option D D. 42º Explanation SinC = 1/n=1/1.5 = 0.6667…
A. magnified B. behind the mirror C. real D. inverted Correct Answer: Option B B. behind the mirror
A. at the centre of curvature B. at the principal focus C. between the pole and principal focus D. between…
A. increases B. decreases C. remains the same D. increases and later decrease Correct Answer: Option B B. decreases
A. 400J B. 1600J C. 24000J D. 96000J Correct Answer: Option D D. 96000J Explanation Q = I²RT = 4²…