Related Questions

একটি ধাতব তলে λ তরঙ্গদৈর্ঘ্যের একবর্ণী আলোকরশ্মি আপতিত হলে ফটো-ইলেক্ট্রন নির্গত হয় এবং এক্ষেত্রে বিভবের মান 3Vo একই তলে যখন 2λতরঙ্গদৈর্ঘ্যের একবর্ণী আলো আপতিত হয়, তখন নিবৃত্তি বিভবের মান Vol ফটো-ইলেক্ট্রন নির্গত হওয়ার জন্য ঐ তলটির সূচন তরঙ্গদৈর্ঘ্যের মান নির্ণয় কর।(A monochromatic light of wavelength λ is incident on a metallic surface then ejects photo-electron and the value of stopping potential is 3Vo. When the same surface is illuminated by a light of wavelength 2λ., the stopping potential becomes Vo. Calculate the threshold wavelength for this surface to eject photo electrons.)
Which one of the following is not necessarily the advantage of D.C. motors over A.C. motors?
[Rewrite the sentence starting with the part given and bracket below, keeping the meaning changed in question] After three hours of walking the museum, the entire family felt in need of a rest. (The entire family felt in need of a rest)
Japan experiences frequent earth-quakes because it is located ________
A direct on line starter is used: for starting motors
Which of the following motors is non-self starting ?
Synchronous motors are generally not self-starting because
Star-delta starting of motors is not possible in case of
DOL starting of induction motors is usually restricted to
Which of the following motors is inherently self starting ?