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Questions  

What can be the angle between (P+Q) and (PQ)?

a
90o
b
0o only
c
any angle between 0o and 180o
d
180o only

detailed solution

Correct option is C

β is the angle between P→+Q→ and P→−Q→. β can have any value from 0o to 180o depending upon magnitudes of P→ and Q→ and angle θ between them.

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