| ⇦ | 
| ⇨ |
The angle between the vectors (i+j) and (j+k) is
Options
(a) 90⁰
(b) 60⁰
(c) 30⁰
(d) 45⁰
Correct Answer:
60⁰
Explanation:
A = i + j, B = j + k
A . B = |A| |B| cos θ
where θ is the angle between two vectors A and B.
.·. A.B = (i + j).(j + k) = 1
|A| = √(1² + 1²) = √2,
|B| = √(1² + 1²) = √2
.·. cos θ = A.B / |A| |B| = 1/(√2×√2) = 1/2
θ = cos⁻¹ (1/2) = 60⁰
Related Questions: - The angle of incidence for a ray of light at a refracting surface of a prism is 45⁰.
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Topics: Motion in Plane
(93)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The angle of incidence for a ray of light at a refracting surface of a prism is 45⁰.
- Two closed pipes produce 10 beats per second when emitting their fundamental nodes.
- The drive shaft of an automobile rotates at 3600 rpm and transmits 80 HP
- In Young’s double slit experiment, when wavelength used is 6000Å and the screen
- A satellite of mass m revolves around the earth of radius R at a height x from
Topics: Motion in Plane (93)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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