| ⇦ | 
| ⇨ |
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: - A Gaussian surface in the cylinder of cross-section πa² and length L is immersed
- A photocell employs photoelectric effect to convert
- A spherical body of emissivity e=0.6, placed inside a perfectly black body is maintained
- During production of cathode ray
- The moderator in a reactor
Topics: Motion in Plane
(93)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A Gaussian surface in the cylinder of cross-section πa² and length L is immersed
- A photocell employs photoelectric effect to convert
- A spherical body of emissivity e=0.6, placed inside a perfectly black body is maintained
- During production of cathode ray
- The moderator in a reactor
Topics: Motion in Plane (93)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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