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Question
Statement 1 – A square of side 2m lying on y – z plane can be represented as 4^i or −4^i vectorially.
Statement – Any planar area can have two directions perpendicular to it.
Select the correct option:
Statement 1 – A square of side 2m lying on y – z plane can be represented as 4^i or −4^i vectorially.
Statement – Any planar area can have two directions perpendicular to it.
Select the correct option:
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Solution
The correct option is A 1 is true 2 is true and 2 is the correct explanation of 1
Consider an area as shown,
Now if we have assigned, →|ΔS|=length of arrow
= 5 units
As clearly shown, surface ΔS lying on a x – z plane can have 2 possible normal ⊥r to it, one towards +y and the other one pointing – y.
Learning: Both directions will lie along the same axis but facing away. Mathematically it implies that both vectors will have opposite signs.
e.g. ^B=−^A
1 is true 2 is true and 2 is the correct explanation of 1
Consider an area as shown,
Now if we have assigned, →|ΔS|=length of arrow
= 5 units
As clearly shown, surface ΔS lying on a x – z plane can have 2 possible normal ⊥r to it, one towards +y and the other one pointing – y.
Learning: Both directions will lie along the same axis but facing away. Mathematically it implies that both vectors will have opposite signs.
e.g. ^B=−^A
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