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কম্পিউটার সায়েন্স এন্ড ইঞ্জিনিয়ারিং

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261. MCQPractice set · Question 48

Surface energy-এর dimension কী?

a.
[MT⁻²]
b.
[ML²T⁻²]
c.
[MLT⁻²]
d.
[ML⁻¹T⁻²]

Correct answer: b

Surface energy হলো energy, তাই dimension [ML²T⁻²]।

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262. MCQPractice set · Question 49

Wavelength-এর dimension কী?

a.
[L]
b.
[T]
c.
[LT⁻¹]
d.
[L⁻¹]

Correct answer: a

Wavelength একটি length, তাই dimension [L]।

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263. MCQPractice set · Question 50

Wave number-এর dimension কোনটি?

a.
[L]
b.
[L⁻¹]
c.
[T⁻¹]
d.
[LT⁻¹]

Correct answer: b

Wave number k = 2π/λ; 2π dimensionless, তাই k-এর dimension [L⁻¹]।

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264. MCQPractice set · Question 51

Intensity of sound-এর dimension কী?

a.
[ML²T⁻³]
b.
[MLT⁻³]
c.
[ML⁻¹T⁻³]
d.
[MT⁻²]

Correct answer: c

Intensity = power/area = [ML²T⁻³]/[L²] = [ML⁻¹T⁻³]।

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265. MCQPractice set · Question 52

Simple harmonic motion-এ angular frequency-এর dimension কোনটি?

a.
[T]
b.
[T⁻¹]
c.
[LT⁻¹]
d.
[T⁻²]

Correct answer: b

Angular frequency হলো প্রতি time-এ phase change; radian dimensionless, তাই [T⁻¹]।

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266. MCQPractice set · Question 53

Time period-এর dimension কী?

a.
[T]
b.
[T⁻¹]
c.
[LT⁻¹]
d.
[1]

Correct answer: a

Time period সরাসরি time quantity, তাই [T]।

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267. MCQPractice set · Question 54

Velocity potential-এর dimension কী হতে পারে?

a.
[L²T⁻¹]
b.
[LT⁻¹]
c.
[L²T⁻²]
d.
[T⁻¹]

Correct answer: a

Velocity = gradient of velocity potential; তাই potential-এর dimension velocity × length = [L²T⁻¹]।

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268. MCQPractice set · Question 55

Refractive index-এর dimension কোনটি?

a.
[L]
b.
[T⁻¹]
c.
[1]
d.
[LT⁻¹]

Correct answer: c

Refractive index = speed in vacuum/speed in medium, তাই এটি dimensionless।

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269. MCQPractice set · Question 56

Relative density-এর dimension কী?

a.
[ML⁻³]
b.
[1]
c.
[L³]
d.
[M]

Correct answer: b

Relative density হলো দুই density-এর ratio, তাই dimensionless।

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270. MCQPractice set · Question 57

Efficiency-এর dimension কোনটি?

a.
[1]
b.
[T⁻¹]
c.
[ML²T⁻²]
d.
[L]

Correct answer: a

Efficiency = useful output/input; একই ধরনের quantity-এর ratio হওয়ায় dimensionless।

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