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ইলেকট্রিক্যাল এন্ড ইলেকট্রনিক ইঞ্জিনিয়ারিং

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1401. MCQPractice set · Question 82

একটি disc-এর angular velocity 10 rad/s; r=0.1 m point-এর speed কত?

a.
0.1 m/s
b.
1 m/s
c.
10 m/s
d.
100 m/s

Correct answer: b

v=rω=0.1×10=1 m/s।

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1402. MCQPractice set · Question 83

একই disc-এ r=0.3 m point-এর speed কত?

a.
1 m/s
b.
3 m/s
c.
10 m/s
d.
30 m/s

Correct answer: b

v=0.3×10=3 m/s।

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1403. MCQPractice set · Question 84

একটি point-এর v=6 m/s এবং ω=3 rad/s হলে radius কত?

a.
1 m
b.
2 m
c.
3 m
d.
18 m

Correct answer: b

r=v/ω=6/3=2 m।

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1404. MCQPractice set · Question 85

একটি point-এর a_c=18 m/s², r=2 m হলে ω কত?

a.
3 rad/s
b.
6 rad/s
c.
9 rad/s
d.
36 rad/s

Correct answer: a

ω=√(a_c/r)=√9=3 rad/s।

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1405. MCQPractice set · Question 86

একটি point-এর F_c=20 N, m=2 kg, r=5 m হলে v কত?

a.
5 m/s
b.
√50 m/s
c.
10 m/s
d.
50 m/s

Correct answer: b

v²=F_cr/m=20×5/2=50, তাই v=√50 m/s।

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1406. MCQPractice set · Question 87

একটি body circular motion-এ এক revolution-এ net displacement কত?

a.
0
b.
2πr
c.
πr
d.
r

Correct answer: a

এক revolution শেষে initial position-এ ফিরে আসে।

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1407. MCQPractice set · Question 88

এক revolution-এ distance কত?

a.
0
b.
r
c.
2πr
d.
πr²

Correct answer: c

এক full circle-এর circumference 2πr।

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1408. MCQPractice set · Question 89

এক revolution-এ average velocity কী?

a.
0
b.
v
c.
ωr
d.
2πr/T

Correct answer: a

Net displacement zero, তাই average velocity zero।

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1409. MCQPractice set · Question 90

এক revolution-এ average speed কী?

a.
0
b.
2πr/T
c.
r/T
d.
ω/T

Correct answer: b

Average speed=distance/time=2πr/T।

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1410. MCQPractice set · Question 91

একটি car circular track-এ constant speed-এ চলে; acceleration zero কি?

a.
না, centripetal acceleration আছে
b.
হ্যাঁ
c.
শুধু straight অংশে
d.
শুধু rest-এ

Correct answer: a

Speed constant হলেও velocity direction বদলায়, তাই acceleration non-zero।

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