A. f/4 B. f/2 C. f D. 2f E. 4f Correct Answer: Option D - 2f
A. reflection B. polarisation C. interference D. diffraction E. refraction Correct Answer: Option E - refraction
A. earth casts a shadow on the moon B. moon casts a shadow on the sun C. moon is between…
A. both the ebonite rod and the fur will be negatively charged B. the ebonite rod will be positively charged…
A 90-W immersion heater is used to supply energy for five minutes. The energy supplied is used to completely melt…
A piece of metal is heated until it becomes red-hot, it is then quickly transferred into a beaker containing boiling…
A waterfall is 1.260m high. Calculate the change in temperature of a quantity of water that falls from the top…
Dry oxygen is trapped by a pellet of mercury in a uniform capillary tube which is sealed at one end.…
A. evaporation B. radiation C. conduction D. convention E. condensation Correct Answer: Option B - radiation
Air at temperature 527°C and pressure 30 atmospheres is admitted into the cylinder of an engine. Calculate the pressure of…