Related Questions

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 $$\sigma \left( {1 + \frac{{3{\text{a}}}}{{\text{b}}}} \right)$$
The merging of a free electron and a hole is called
A Covalent bonding
B Lifetime
C Recombination
D Thermal energy
E None of the above
A free electron is a valence electron that has broken away from its parent atom.
A True
B False
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
If it takes 4 hours to dig a hole by 50 workers, how long should it take to dig the same hole by 30 workers?
A 2 hours 24 minutes
B 6 houres 12 minutes
C 5 houres 12 minutes
D 6 hours 40 minutes
Of the following , which is a hole that could be the empty hole ?
A 1
B 2
C 4
D 6
দেওয়া আছে (i) অর্ধপরিবাহীর Majority carrier election, (ii) p-type অর্ধপরিাবাহীর Majority carrier hole এবং (iii) pure অর্ধপিরবাহীর Majority carrier hole । নিচের কোনটি সঠিক?
A i ও ii
B ii ও iii
C i ও iii
D i, ii, ও iii
If takes 6 men 4 days to dig a hole 3 feet deep. How long it will take 10 men to dig a hole 7 feet deep?
A 5.25 days
B 5.4 days
C 5.6 days
D 5.8 days
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 there is a circular hole in a metal plate, what happens to the radius of the hole when the plate is heated?
A Increases
B Decreases
C Unchanged
D Depends upon the metal

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