Physics XI  Scalars & Vectors

1. If a force 10N makes an angle 30 degree with the horizontal, its x-component will be is given by: a) 5N b) 8.66N c) 0.899N d) 8.9N

2. A vector which has one magnitude is called as: a) Unit Vector b) Null Vector c) Free vector d) Position vector

3. Which of the following quantity is a Vector: a) Acceleration b) Mass c) Volume d) Time

4. Scalars are those physical quantities which can be represented by: a) A number with proper units b) By a number c) Only by proper units d) By an Arrow

5. Two forces of magnitude 5N and 15N are applied on a body in the same direction, the maximum value of their resultant will be: a) 10N b) 20N c) 3N d) 0.333N

6. Two forces of magnitude 3N and 4 N are acting on a body, both forces are at right angle to each other their resultant will be: a) 8N b) 5N c) Zero d) 2N

7. A unit vector is obtained by dividing the vector by its: a) Any vector quantity b) Magnitude with direction c) Magnitude without direction d) Any scalar quantity

8. When a vector is multiplied by a negative number its direction: a) Not change b) Becomes parallel c) Becomes vertical d) Change by 180 degree

9. The scalar product of two vectors is zero, it means: a) Opposite in direction to each other b) Both are equal vectors c) Both vectors are perpendicular to each other d) Parallel to each other

10. The self cross product can be obtained at an angle of: a) 0 degree b) 180 degree c) 45 degree d) 90 degree

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