An object is placed 36cm from a converging lens of focal length 24cm. If a real image which is 4cm high is formed, Calculate the height of the object.
A. 2.0cm B. 4.0cm C. 6.0cm D. 8.0cm E. 10.0cm Correct Answer: Option A – 2.0cmA transparent rectangular block 5.0cm thick is placed on a black dot. The dot when viewed from above is seem 3.0cm from the top of the block; calculates the refractive index of the material of the block.
A. 2/5 B. 3/5 C. 3/2 D. 5/3 E. 5/2 Correct Answer: Option D – 5/3
Which of the following statements is/are not correct about image formed by a plane mirror?
I. The magnification produced is 1 II. The image distance is same as the object distance III. The image is real IV. The image is laterally inverted A. I only B. II only C. III only D. I & II only E. II & IV only Correct Answer: Option C – III...
Which of the following will affect the saturation vapour pressure of a liquid?
A. Temperature of the liquid B. Humidity of air C. Volume of vapour D. Volume of the liquid E. mass of the liquid Correct Answer: Option A – Temperature of the liquid
Which of the following instrument may be used to measure the relative humidity?
A. Hydrometer B. Barometer C. Manometer D. Hypsometer E. Hygrometer Correct Answer: Option E – HygrometerProducts
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