| ⇦ | 
| ⇨ |
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: - What is the energy of He⁺ electron in first orbit?
- When a current of (2.5±0.5) A flows through a wire, it develops a potential difference
- Temperature is a measurement of coldness or hotness of an object.
- If 20% of a radiactive element decays in 10 days, then amount of original material left
- A particle of mass M is executing oscillations about the origin on the x-axis.
Topics: Motion in Plane
(93)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- What is the energy of He⁺ electron in first orbit?
- When a current of (2.5±0.5) A flows through a wire, it develops a potential difference
- Temperature is a measurement of coldness or hotness of an object.
- If 20% of a radiactive element decays in 10 days, then amount of original material left
- A particle of mass M is executing oscillations about the origin on the x-axis.
Topics: Motion in Plane (93)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply