(a) Displacement of a mosquito in space(b) Light intensity in a drawing room(c) Temperature distribution in your classroom(d) Atmospheric pressure in a given region(e) Humidity of a city 3. Which of these is correct?
(a) A X A = |A| 2
(b) A X B + B X A = 0
(c) A • B • C = B • C • A
(d) a x • . a y = a z
(e) a k = a x - a y where a k is a unit vector.
4.Which of the following identities is not valid?
(a) a(b + c) = ab + bc
(b) a X (b + c) = a X b + a X c
(c) a • b = b • a
(d) c • (a X b) = - b • (a X c) (e) a A • a B = cos Ɵ AB
5. Which of the following statements are meaningless?
(a) A • B + 2A = 0
(b) A • B + 5 = 2A
(c) A(A + B) + 2 = 0
(d) A • A + B • B =