Related Questions

দুটি সুসঙ্গত উৎস থেকে λ দৈর্ঘ্যের দুটি তরঙ্গ সমদশায় বের হয় । একটি বিন্দুতে যেখানে তরঙ্গ দুটি মিলিত হয় সেখানে তাদের দশা পার্থক্য 90° । তরঙ্গ দুটির অতিক্রান্ত পথ পার্থক্য তখন কত ? ( Two coherent sources emit waves of wavelength λ which are in phase. which are in phase. The two waves meet at a point where they have a phase difference of 90°. Which of the following could be the traversed path difference between the waves?)
A 2λ
B λ
C λ/2
D λ/4
The instrument which records the seismic waves generated by the occurrence of earth-quakes is called:
A Barometer
B Gyrometer
C Wavograph
D Seismograph
Which is the proper order of seismic waves as they are received at seismograph station?
A L-wave, P-wave, S-wave
B P-wave, L-wave, S-wave
C P-wave, S-wave, L-wave
D S-wave, P-wave, L-wave
Why does the west coast of India receive more rainfall from southwest monsoon than the east coast?
A Unlike the east coast this coast is straight
B The Western Ghats obstruct the winds causing rainfall
C The east coast is broader than the west coast
D The Eastern Ghats extend parallel to wind direction
Why does the west coast of India receive more rainfall from south-west monsoon than the east coast?
A Unlike the east coast this coast is straight
B The Western Ghats obstruct the windscausing rainfall
C The east coast is broader than the west coast
D The Eastern Ghats extend parallel to winddirection
Unlike other parts of the Indian Coast, fishing industry has not developed along the Saurashtra coast because
A there are few indentions suitable for fishing
B of overwhelming dependence on agriculture and animal husbandary
C the sea water is relatively more saline
D of industrial development leading to widespread pollution of coastal area
Two important rivers - one with its source in Jharkhand (and known by a different name in Odisha), and another, with its source in Odisha - merge at a place only a short distance from the coast of Bay of Bengal before flowing into the sea. This is an important site of wildlife and biodiversity and a protected area. Which one of the following could be this?
A Bhitarkanika
B Chandipur-on-sea
C Gopalpur-on-sea
D Simlipal
Why does the ionosphere of the Earth's atmosphere facilitate radio communication? i. The presence of ozone causes the reflection of radio waves to earth ii. Radio waves have a very long wavelength
A i only
B ii only
C both i & ii
D neither i nor ii
A special lottery is to be held to select the student who will live in the only deluxe room in a dormitory . There are 100 seniors, 150 juniors and 200 sophomres who applied. Each senior's junior's name , 2 times; and each sophomres who applied. Each senior's name is placed in the lottery 3 times; each junior's name ,2 times name, 2 times ; and each sphomore's name , 1 time . What is the probability that a senior's name will be chosen?
A 18
B 38
C 48 
D 28
The western coast of India receive very high rainfall in summer mainly due to
A Tropical location
B Nearness to sea
C Western Ghats
D Himalayas

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