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ফুড ইঞ্জিনিয়ারিং

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2101. MCQPractice set · Question 58

Infinity-তে gravitational potential সাধারণত কত ধরা হয়?

a.
0
b.
−∞
c.
GM
d.
g

Correct answer: a

Standard reference V(∞)=0।

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2102. MCQPractice set · Question 59

Planetary orbit-এর জন্য gravity-এর কাজ কী?

a.
centripetal ও orbital binding force
b.
শুধু heat
c.
friction
d.
charge force

Correct answer: a

Gravity orbit বাঁকায় এবং body-কে central object-এর সঙ্গে bound রাখতে পারে।

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2103. MCQPractice set · Question 60

শেষ পর্যন্ত gravitation-এর central idea কোনটি?

a.
mass-এর মধ্যে universal attraction
b.
শুধু electric attraction
c.
শুধু contact force
d.
শুধু rotational force

Correct answer: a

সব mass পরস্পরকে universal gravitational force দিয়ে আকর্ষণ করে।

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2104. MCQPractice set · Question 61

Surface থেকে height R-এ g কত হবে?

a.
g/4
b.
g/2
c.
2g
d.
g

Correct answer: a

Centre distance 2R, তাই g_h=g/4।

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2105. MCQPractice set · Question 62

Surface থেকে height R/2-এ g_h/g কত?

a.
4/9
b.
1/2
c.
2/3
d.
9/4

Correct answer: a

g_h/g=[R/(3R/2)]²=4/9।

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2106. MCQPractice set · Question 63

Depth R/2-এ uniform Earth model-এ g কত?

a.
g/2
b.
g/4
c.
2g
d.
0

Correct answer: a

g_d=g(1−d/R)=g/2।

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2107. MCQPractice set · Question 64

Height h≪R হলে g_h-এর approximation কী?

a.
g(1−2h/R)
b.
g(1+2h/R)
c.
gR/h
d.
g−hR

Correct answer: a

(1+h/R)⁻²≈1−2h/R।

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2108. MCQPractice set · Question 65

Depth d≪R হলে g_d-এর approximation কী?

a.
g(1−d/R)
b.
g(1+d/R)
c.
gR/d
d.
g−R/d

Correct answer: a

Uniform Earth model-এ depth-এর সঙ্গে g linearly কমে।

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2109. MCQPractice set · Question 66

Earth-এর centre-এ g কত?

a.
0
b.
9.8 m/s²
c.
infinite
d.
G

Correct answer: a

Symmetry-এর কারণে gravitational pulls cancel করে।

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2110. MCQPractice set · Question 67

Effective g কোথায় বেশি?

a.
poles
b.
equator
c.
সব জায়গায় সমান
d.
centre

Correct answer: a

Pole-এ centrifugal reduction নেই এবং radius সামান্য কম।

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