Question

If P.Q = 0 , then |PxQ| is

1.|P||Q| 2. zero 3. 1 4. √PQ

write explanation,if it is right I wll mark you as the Brainliest​

Answer 1

Answer:

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Explanation:

hooliganism dhaddhad kanishka tharvayach

Answer 2

Given: P.Q = 0

To find:If P.Q = 0 , then |PxQ| is

1.|P||Q|

2. zero

3. 1

4. √PQ

Solution:

Step 1: Find angle between both the vectors:

If dot product of two vectors P and Q is zero,that means the angle between both vectors are 90°.

Because

$P.Q=|P||Q|cos\theta$

we know that cos90°=0,

Thus,

P.Q=0

Step 2: Find cross product between the two vectors

Cross product is given by

$P\times Q=|P||Q|sin\theta$

put the value of angle, i. e. 90°

$P\times Q=|P||Q|sin90°$

Because sin 90°=1

Therefore

$P\times Q=|P||Q|$

Now magnitude

$|P\times Q|=||P||Q||$

or

$|P\times Q|=|P||Q|$

Final answer:

Option 1 is correct.

Hope it helps you.

To learn more on brainly:

Numerical value of vector A = 4i - 3j + 5k is ? options: a) 5√2,,,, b) 2,,, c) 6√3,,,d) 0

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