Unit Conversion MCQs and VSAs

SECTION – A (PHYSICS)

1. Give one-word answers (2 x ½ = 1)

(i) Convert one quintal into grams  ____________
(ii) Convert 100 centimetres into kilometre  ____________

2. Fill in the blanks. (2 x ½ = 1)   

(i) Measurement of a physical quantity consists of a ________ and the _______ of the unit.
(ii)  Measurement is the comparison of an _________ quantity with _______ quantity.

3. Write true or false. (4 x ¼  = 1)

(i)Submultiples of standard units are used to make large measurements.  _____________

(ii)  In scientific work, accuracy of measurement is not required. _____________

(iii) We can measure similar quantities with different instruments. _____________

(iv) Accurate measurements are always necessary in our day-to-day life.  _____________

4. Choose the most appropriate answer. (4 x ¼  = 1)

(i)Which one of these is not a reliable unit of measurement?

a. Handspan           b. Metre                   c. Second              d. None of these

(ii)  Which one of these is not a physical quantity?

a. Speed                  b. Metre                   c. Time                   d. Temperature

(iii) Which one of the following is not a measurement of length?

a. Depth           b. Thickness c. Width                      d. Mass

(iv) Which of these will always be translatory motion.

a. periodic motion    b. curvilinear motion    c. rotational motion d. all of these

5. We say that a tree is stationary. But is the tree in motion with respect to some other object?(1)

6. Why are standard units used in measurements? (1)

7. What precautions will you take while measuring the length of a line segment with a scale?(1)