MCQOPTIONS
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MCQOPTIONS
This section includes 3 Mcqs, each offering curated multiple-choice questions to sharpen your Physics Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
There are 6 vectors: a, b, c, d, e, f. Simply the following expression: [ a(b . c) X (e . f)d ] X [ a – d ].‘X’ represents cross product while ’.‘ represents dot product. Vectors a & d are perpendicular. |
| A. | 0 |
| B. | (b . c)(e . f) [ d + a ] |
| C. | (b . c)(e . f) [ d – a ] |
| D. | (b . c)(e . f) [ d X a ] |
| Answer» C. (b . c)(e . f) [ d – a ] | |
| 2. |
Find the vector product (a X b) of the two given vectors: a = 2i + 3j + 4k, b = 3i + 5j. Here, i, j & k are unit vectors along three mutually perpendicular axes. |
| A. | -20i + 12j + k |
| B. | 10i + 6j + 1/2k |
| C. | 20i – 12j – k |
| D. | 10i – 6j -1/2k |
| Answer» B. 10i + 6j + 1/2k | |
| 3. |
Regarding the velocity of a particle in uniform circular motion about a fixed axis, select the correct option. w & r angular velocity and radius vectors respectively. ‘X’ & ‘ . ’ represent cross & dot products respectively. |
| A. | v = r X w |
| B. | v = w X r |
| C. | v = w.r |
| D. | w = v.r |
| Answer» C. v = w.r | |