| ⇦ | 
| ⇨ |
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: - Ohm’s law valid
- The current in the coil of inductance 5H decreases at the rate of 2 A/s
- Two metal spheres of radii 0.01m and 0.02m are given a charge of 15mC and 45mC
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Topics: Motion in Plane
(93)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Ohm’s law valid
- The current in the coil of inductance 5H decreases at the rate of 2 A/s
- Two metal spheres of radii 0.01m and 0.02m are given a charge of 15mC and 45mC
- The damping force on an oscillator is directly proportional to the velocity.
- Two bodies of masses m₁ and m₂ are initially at rest at infinite distance apart
Topics: Motion in Plane (93)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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