| ⇦ | 
| ⇨ |
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
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Subject: Physics
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If temperature of gas increases from 27°C to 927°C, the kinetic energy will be
- A body rolls down a stair case of 5 steps. Each step has height 0.1 m and width 0.1m
- A ray of light is incident on a transparent glass slab of refractive index 1.62
- A charged particle enters a uniform magnetic field with a certain speed at right angles
- Magnetic flux φ (in weber) linked with a closed circuit of resistance 10 Ω varies
Topics: Motion in Plane (93)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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