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সিভিল ইঞ্জিনিয়ারিং

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2131. MCQPractice set · Question 88

দুই equal mass-এর midpoint-এ gravitational field কী?

a.
0
b.
maximum
c.
G
d.
infinite

Correct answer: a

দুই equal field opposite direction-এ cancel করে।

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2132. MCQPractice set · Question 89

দুই equal mass-এর midpoint-এ potential কী?

a.
negative non-zero
b.
zero সবসময়
c.
positive
d.
infinite positive

Correct answer: a

Potential scalar, তাই দুই negative potential যোগ হয়।

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2133. MCQPractice set · Question 90

Spherical shell-এর ভিতরে gravitational field কী?

a.
0
b.
GM/r²
c.
GMr²
d.
infinite

Correct answer: a

Shell theorem অনুযায়ী uniform shell-এর ভিতরে field zero।

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2134. MCQPractice set · Question 91

Spherical shell-এর ভিতরে potential কেমন?

a.
constant
b.
zero সবসময়
c.
1/r
d.
linear

Correct answer: a

Field zero হওয়ায় ভিতরে potential constant।

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2135. MCQPractice set · Question 92

Shell-এর বাইরে gravitational field কীভাবে নির্ণয় করা যায়?

a.
পুরো mass centre-এ ধরে
b.
শুধু surface mass ধরে
c.
zero ধরে
d.
radius-এর proportional

Correct answer: a

বাইরে shell point mass-এর মতো আচরণ করে।

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2136. MCQPractice set · Question 93

Gravitational field lines-এর direction কী?

a.
mass-এর দিকে
b.
mass থেকে বাইরে
c.
tangent
d.
random

Correct answer: a

Gravity attractive, তাই field line mass-এর দিকে।

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2137. MCQPractice set · Question 94

Gravitational field lines কি intersect করে?

a.
না
b.
হ্যাঁ
c.
শুধু centre-এ
d.
শুধু vacuum-এ

Correct answer: a

এক point-এ field direction unique, তাই lines intersect করে না।

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2138. MCQPractice set · Question 95

Gravitational field intensity-এর dimension কী?

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

Correct answer: a

Field intensity=g, তাই acceleration-এর dimension।

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2139. MCQPractice set · Question 96

Potential gradient ও field-এর relation কী?

a.
g=−dV/dr
b.
g=dV×dr
c.
g=V/r²
d.
g=Vr

Correct answer: a

Field potential decrease-এর দিকে directed।

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2140. MCQPractice set · Question 97

Gravity-এর work path-independent কেন?

a.
gravity conservative
b.
gravity contact force
c.
mass constant
d.
speed constant

Correct answer: a

Conservative force-এর work শুধু endpoints-এর উপর নির্ভর করে।

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