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ইলেকট্রিক্যাল এন্ড ইলেকট্রনিক ইঞ্জিনিয়ারিং

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1611. MCQPractice set · Question 75

Static friction-এর maximum value কত?

a.
μ_sN
b.
μ_k/N
c.
N/μ_s
d.
mgμ²

Correct answer: a

Limiting static friction f_max=μ_sN।

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1612. MCQPractice set · Question 76

Kinetic friction-এর formula কোনটি?

a.
μ_kN
b.
N/μ_k
c.
μ_k/N
d.
mg/μ_k

Correct answer: a

Sliding অবস্থায় f_k=μ_kN।

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1613. MCQPractice set · Question 77

সাধারণত μ_s ও μ_k-এর relation কী?

a.
μ_s>μ_k
b.
μ_s<μ_k
c.
μ_s=0
d.
μ_k=0

Correct answer: a

Motion শুরু করাতে limiting static friction বেশি হয়।

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1614. MCQPractice set · Question 78

FBD-তে কী আঁকা হয়?

a.
body-এর external forces
b.
শুধু velocity
c.
শুধু path
d.
শুধু energy

Correct answer: a

Free-body diagram-এ isolated body-এর উপর acting external forces দেখানো হয়।

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1615. MCQPractice set · Question 79

Normal reaction-এর direction কী?

a.
surface-এর perpendicular
b.
surface-এর parallel
c.
always upward
d.
always downward

Correct answer: a

Normal force contact surface-এর normal direction-এ থাকে।

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1616. MCQPractice set · Question 80

Tension force-এর direction কী?

a.
string বরাবর
b.
string-এর perpendicular
c.
always upward
d.
always downward

Correct answer: a

Taut string body-কে string-এর line বরাবর টানে।

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1617. MCQPractice set · Question 81

Friction force কোন দিকে?

a.
relative motion-এর বিপরীত
b.
motion-এর same direction
c.
vertical
d.
normal-এর same

Correct answer: a

Friction sliding বা sliding tendency-এর বিরোধিতা করে।

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1618. MCQPractice set · Question 82

একটি block-এ 10 N east ও 10 N west force থাকলে acceleration কী?

a.
0
b.
10/m
c.
20/m east
d.
20/m west

Correct answer: a

Equal opposite forces cancel করে, net acceleration zero।

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1619. MCQPractice set · Question 83

Newton's second law-এর vector form কোনটি?

a.
F⃗=m a⃗
b.
F=m/a
c.
F⃗=mv
d.
F=a/m

Correct answer: a

Force ও acceleration উভয় vector, তাই F⃗=m a⃗।

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1620. MCQPractice set · Question 84

Acceleration-এর direction net force-এর কেমন?

a.
same direction
b.
opposite
c.
perpendicular
d.
random

Correct answer: a

a⃗=F⃗_net/m, তাই direction একই।

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