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ইলেকট্রিক্যাল এন্ড ইলেকট্রনিক ইঞ্জিনিয়ারিং

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831. MCQPractice set · Question 39

দুটি perpendicular vector-এর cross product-এর magnitude কত?

a.
0
b.
AB
c.
A+B
d.
A−B

Correct answer: b

θ=90° হলে sin90°=1, তাই |A×B|=AB।

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832. MCQPractice set · Question 40

î×ĵ-এর মান কী?

a.
b.
−k̂
c.
0
d.
î

Correct answer: a

Right-hand rule অনুযায়ী î×ĵ=k̂।

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833. MCQPractice set · Question 41

ĵ×k̂-এর মান কী?

a.
î
b.
−î
c.
0
d.
ĵ

Correct answer: a

Cartesian cyclic order-এ ĵ×k̂=î।

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834. MCQPractice set · Question 42

k̂×î-এর মান কী?

a.
ĵ
b.
−ĵ
c.
0
d.

Correct answer: a

Right-hand cyclic relation থেকে k̂×î=ĵ।

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835. MCQPractice set · Question 43

ĵ×î-এর মান কী?

a.
b.
−k̂
c.
0
d.
î

Correct answer: b

Cross product anti-commutative, তাই ĵ×î=−(î×ĵ)=−k̂।

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836. MCQPractice set · Question 44

k̂×ĵ-এর মান কী?

a.
î
b.
−î
c.
0
d.
ĵ

Correct answer: b

k̂×ĵ=−(ĵ×k̂)=−î।

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837. MCQPractice set · Question 45

î×k̂-এর মান কী?

a.
ĵ
b.
−ĵ
c.
0
d.
î

Correct answer: b

î×k̂=−(k̂×î)=−ĵ।

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838. MCQPractice set · Question 46

î×î-এর মান কত?

a.
1
b.
0
c.
î
d.
−1

Correct answer: b

নিজের সঙ্গে parallel vector-এর cross product zero।

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839. MCQPractice set · Question 47

Cross product কি commutative?

a.
হ্যাঁ, A×B=B×A
b.
না, A×B=−B×A
c.
শুধু parallel-এ
d.
সবসময় zero

Correct answer: b

Cross product anti-commutative; order বদলালে sign বদলায়।

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840. MCQPractice set · Question 48

Cross product distributive কি?

a.
A×(B+C)=A×B+A×C
b.
A×(B+C)=A×B×A×C
c.
A×(B+C)=A+B+C
d.
না

Correct answer: a

Cross product vector addition-এর উপর distributive।

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