Related Questions

β-rays emission in radioactive disintegration is always accompanied by the emission of
A γ-rays
B α-rays
C Neutrons
D None of these
আলোক তড়িৎক্রিয়া (photoelectric effect) এর সূত্রটি ব্যবহার করে নিচের কোনটি নির্ণয় করা যায়?
A বোল্টজম্যান
B স্টিফেন বোল্টজম্যান ধ্রুবক
C রিডবার্গ ধ্রুবক
D প্ল্যাংকের ধ্রুবক
Photoelectric effect আলোর-
A কণা ধর্ম নির্দেশ করে
B তরঙ্গ ও কণা
C তরঙ্গ ধর্ম নির্দেশ করে
D কোনটিই নয়
A photo electric device in which the resistance of the metal is directly proportional to the light striking on it, is known as photo-conductive cell. Photoelectric transducers are used for the measurement of those parameters, which can be used to produce variation in
A Light intensity
B Current
C Flux density
D Voltage
Photoelectric pyrometers are suitable in the temperature range of __________ °C.
A 400-1600
B 800-1600
C 800-2500
D 400-1000
Who among the following has explained the phenomenon of photoelectric effect?
A Max Planck
B Albert Einstein
C Neils Bohr
D Ernest Rutherford
আলোক তড়িৎ ক্রিয়ায় নিচের কোন কণাগুলির মধ্যে মিথস্ক্রিয়া হয়? (Which of the following particles interact in the photoelectric effect?)
A নিউট্রন ও প্রোটন (Neutron and proton)
B নিউট্রিনো ও ইলেক্ট্রন (Neutrino and electron)
C প্রোটন ও ইলেক্ট্রন (Proton and electron)
D ফোটন ও ইলেক্ট্রন (Photon and electron)
Arman wanted to have Tk. 39,200 as interest after 5 years. He has invested an amount in an account for 1 year at 8% interest rate. From the 2nd year, he invested the principal amount in another account offering 10% interest for 3 years. At the beginning of the fifth year he invested the Principal amount in another account at the rate of 11%. What was the principal amount? (assume simple interest rate)
A Tk. 50,000
B Tk. 80,000
C Tk. 70,000
D Tk. 90,000
E None of them
Which of the following agreement will deal with Greenhouse gas emission mitigation, adaption and finance to be implemented from 2020?
A Uruguay Round
B Paris agreement
C Kyoto Protocol
D Cancun Agreement
Which one is the top country in terms of per capita greenhouse gas emission?
A Japan
B USA
C China
D Brazil

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