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একক চিড়ের দরুন ফ্রনহফার অপবর্তনে চিড়-পুরুত্ব কমালে সন্নিহিত সর্বনিম্ন তীব্রতার অঞ্চল পূর্বের তুলনায়- (For Fraunhofer diffraction due to a single slit, if the slit width is decreased, the adjacent minima compared to before will-)
A দূরে চলে যাবে (move apart)
B কাছে চলে আসবে (come closer)
C একই অবস্থানে থাকবে (remain at the same position)
D শুরুতে কাছে আসবে পরে দূরে চলে যাবে (initially come closer and then move apart)
The bending moment at a section tends to bend or deflect the beam and the internal stresses resist its bending. The resistance offered by the internal stresses, to the bending, is called
A Compressive stress
B Shear stress
C Bending stress
D Elastic modulus
In a simple bending theory, one of the assumptions is that the plane sections before bending remain plane after bending. This assumption means that
A Stress is uniform throughout the beam
B Strain is uniform throughout the beam
C Stress is proportional to the distance from the neutral axis
D Strain is proportional to the distance from the neutral axis
The surface of a certain planet reflects 80 percent of the light that strikes it. The clouds around the planet then absorb 40 percent of the reflected light. What percent of the light that strikes the planet is reflected from the surface and passes through the clouds without being absorbed?
A 32%
B 40%
C 48%
D 60%
If Bashar can run around a ground four times in 20 minutes and Rahim can run around the same ground three times in 12 minutes, who can run around that ground more times in an hour, and how many times more can he run around ?
A Bashar, three times more
B Rahim , three times more
C They both go around 12 times
D Bashar, eight times more
Each of the following problem has a question and two statements which are labeled 1. and. Use the data given in 1. and 2. to decide whether the statements are sufficient to answer the question.Select one of the following . a.Statements (1) ALONE is sufficient,but (2) ALONE is not sufficient. b.Statements (2) ALONE is sufficient,but (1) ALONE is not sufficient. c. Both statement TOGETHER are sufficient but statement alone is sufficient . A fly crawls around the outside of a circle once.A second fly crawls around the outside of a square once.Which fly travels further ? (1) The diagonal of the square is equal to the diagonal of the circle.(2) The fly crawling around the circle took more time to complete has journey than the fly cawing around the square.
A A
B B
C C
D D
কোন চিরের গ্রন্থ 4 x 10-4 cm. যে আলো দিয়ে একে আলোকিত করা হচ্ছে তার তরঙ্গদৈর্ঘ্য 5896 A কেন্দ্রীয় চরমের উভয় পার্শ্বে প্রথমক্রম অবক্ষগুলোর মধ্যবর্তী কৌণিক দূরত্ব নির্ণয় কর।(The width of a slit is 4 x 10-4 cm. The wavelength of the light is 5896 A by which it is illuminated. Find the angular distance between the two minima of first order on both sides of the central maxima.)
A 11.48°
B 17° 15.6'
C 16° 57'
D 8.63°
E 17.2°
A shaft is subjected to bending moment M and a torque T simultaneously. The ratio of the maximum bending stress to maximum shear stress developed in the shaft, is
A $$\frac{{\text{M}}}{{\text{T}}}$$
B $$\frac{{\text{T}}}{{\text{M}}}$$
C $$\frac{{2{\text{M}}}}{{\text{T}}}$$
D $$\frac{{2{\text{T}}}}{{\text{M}}}$$
The bending stress in abeam is __________ bending moment.
A Equal to
B Less than
C More than
D Directly proportional to
If W is total load per unit area on a panel, D is the diameter of the column head, L is the span in two directions, then the sum of the maximum positive bending moment and average of the negative bending moment for the design of the span of a square flat slab, should not be less than
A $$\frac{{{\text{WL}}}}{{12}}{\left( {{\text{L}} - \frac{{2{\text{D}}}}{3}} \right)^2}$$
B $$\frac{{{\text{WL}}}}{{10}}{\left( {{\text{L}} + \frac{{2{\text{D}}}}{3}} \right)^2}$$
C $$\frac{{{\text{WL}}}}{{10}}{\left( {{\text{L}} - \frac{{2{\text{D}}}}{3}} \right)^2}$$
D $$\frac{{{\text{WL}}}}{{12}}{\left( {{\text{L}} - \frac{{\text{D}}}{3}} \right)^2}$$

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