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ইলেকট্রিক্যাল এন্ড ইলেকট্রনিক ইঞ্জিনিয়ারিং

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1131. MCQPractice set · Question 69

Projectile-এর horizontal ও vertical motions কেমন?

a.
independent
b.
একই equation-এ বাধ্যতামূলক
c.
কোনো relation নেই এবং একই time নয়
d.
শুধু vertical

Correct answer: a

দুটি component independent হলেও একই elapsed time t ভাগ করে।

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1132. MCQPractice set · Question 70

Projectile motion বিশ্লেষণে কোন principle ব্যবহৃত হয়?

a.
superposition of independent motions
b.
শুধু conservation of mass
c.
শুধু Hooke law
d.
Ohm's law

Correct answer: a

Horizontal uniform motion ও vertical accelerated motion superpose করে projectile তৈরি হয়।

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1133. MCQPractice set · Question 71

Projectile-এর x-t graph কেমন?

a.
straight line
b.
parabola
c.
circle
d.
horizontal সবসময়

Correct answer: a

x=u cosθ t, তাই x-t relation linear।

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1134. MCQPractice set · Question 72

Projectile-এর y-t graph কেমন?

a.
parabola
b.
straight line সবসময়
c.
circle
d.
constant

Correct answer: a

y=u sinθ t−½gt² quadratic, তাই parabola।

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1135. MCQPractice set · Question 73

Projectile-এর vx-t graph কেমন?

a.
horizontal line
b.
parabola
c.
negative slope
d.
vertical line

Correct answer: a

vx=u cosθ constant।

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1136. MCQPractice set · Question 74

Projectile-এর vy-t graph-এর slope কী?

a.
−g
b.
0
c.
u
d.

Correct answer: a

vy=u sinθ−gt, তাই slope −g।

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1137. MCQPractice set · Question 75

Maximum height-এ vy-t graph কখন zero হয়?

a.
t=u sinθ/g
b.
t=u cosθ/g
c.
t=2u sinθ/g সবসময়
d.
t=0

Correct answer: a

vy=0 বসালে t=u sinθ/g।

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1138. MCQPractice set · Question 76

Projectile-এর range R ও maximum height H-এর 45° ক্ষেত্রে relation কী?

a.
R=4H
b.
R=H
c.
R=2H
d.
H=4R

Correct answer: a

45°-এ R=u²/g এবং H=u²/(4g), তাই R=4H।

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1139. MCQPractice set · Question 77

45° projectile-এর maximum height H জানা থাকলে range কত?

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

Correct answer: c

45°-এ R=4H।

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1140. MCQPractice set · Question 78

45°-এ projectile-এর time of flight T ও range R-এর relation কী?

a.
R=uT/√2
b.
R=uT
c.
R=2uT
d.
R=T/u

Correct answer: a

R=u²/g এবং T=√2u/g; তাই R=uT/√2।

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