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JEE Main Physics Class 11 Physical world and Measurements Part 2 Questions
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© examsnet.com
Question : 51
Total: 100
If
→
P
=
3
^
i
+
√
3
^
j
+
2
^
k
and
→
Q
=
4
^
i
+
√
3
^
j
+
2.5
^
k
then, The unit vector in the direction of
→
P
×
→
Q
is
1
x
(
√
3
^
i
+
^
j
−
2
√
3
^
k
)
. The value of
x
is
[25-Jan-2023 Shift 1]
Your Answer:
Validate
Solution:
→
P
×
→
Q
=
|
^
i
^
j
^
k
3
√
3
2
4
√
3
2.5
|
=
√
3
^
i
2
+
^
j
2
−
√
3
^
k
⇒
→
P
×
→
Q
|
→
P
×
→
Q
|
=
1
2
(
√
3
^
i
2
+
^
j
2
−
√
3
^
k
)
=
1
4
(
√
3
^
i
+
^
j
−
2
√
3
^
k
)
x
=
4
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