Related Questions

সুপরিবাহী পদার্থে Valence Band এবং conduction band-
A আলাদা থাকে
B ওভারল্যাপ থাকে
C অনেক দূরে থাকে
D কোনটিই নয়
The forbidden energy gap between the valence band and conduction band will be least in case of
A Metals
B Semiconductors
C Insulators
D All of the above
A free electron is a valence electron that has broken away from its parent atom.
A True
B False
A plate with an elliptical hole in the centre, with semi-major axis (a) perpendicular to the direction of loading and semi-minor axis (b) along the direction of loading, is subjected to a pull P. The maximum stress induced at the edge of the hole is equal to (where $$\sigma $$ = Stress for a plate with no hole i.e. nominal stress)
A $$\sigma \left( {1 + \frac{{\text{b}}}{{2{\text{a}}}}} \right)$$
B $$\sigma \left( {1 + \frac{{2{\text{a}}}}{{\text{b}}}} \right)$$
C $$\sigma \left( {1 + \frac{{\text{b}}}{{3{\text{a}}}}} \right)$$
D $$\sigma \left( {1 + \frac{{3{\text{a}}}}{{\text{b}}}} \right)$$
Determine the resistance value and tolerance of a resistor that has the following color bands; first band is red, second band is red, third band is orange, and the fourth band is gold
A 220 Ohm, 5%
B 220 Ohm, 10%
C 22,000 Ohm, 5%
D 22, 000 Ohm, 10%
E None of the above
An electron in the conduction band
A Has higher energy than the electron in the valence band
B Has lower energy than the electron in the valence band
C Loses its charge easily
D Jumps to the top of the crystal
স্বাভাবিক অবস্থায় ফ্লোরিনের যোজ্যতা ইলেক্ট্রন (valence electron ) কয়টি?
A 5
B 9
C 1
D 2
The valence electron of a copper atom experiences what kind of attraction toward the nucleus?
A Strong
B Neutral
C Weak
D Impossible to say
E None of the above
The maximum stress due to stress concentration in a bar having circular transverse hole, as compared to its static stress without hole will be
A Same in both cases
B 2 times more
C 3 times more
D 4 times more
If it takes 50 workers 4 hours to dig a hole, how long should it take 30 workers to dig the same hole?
A 2 hrs, 24 mins
B 6 hrs, 12 mins
C 5 hrs, 12 mins
D 6 hrs, 40 mins

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