| ⇦ | 
| ⇨ |
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: - Sodium and copper have work function 2.3 eV and 4.5 eV respectively
- The cylindrical tube of a spray pump has radius R, one end of which has n fine holes,
- A circular road of radius 1000m has banking angle 45°.The maximum safe speed of a car
- The power factor of an AC circuit having resistance R and inductance L connected
- A layer of colourless oil spreads on water surface. White light is incident on it
Topics: Motion in Plane
(93)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Sodium and copper have work function 2.3 eV and 4.5 eV respectively
- The cylindrical tube of a spray pump has radius R, one end of which has n fine holes,
- A circular road of radius 1000m has banking angle 45°.The maximum safe speed of a car
- The power factor of an AC circuit having resistance R and inductance L connected
- A layer of colourless oil spreads on water surface. White light is incident on it
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