Question Answers

Example 7 Find a vector in the direction of vector a = i – 2j that has magnitude 7 units. Example 7 Find a vector in the direction of vector a = i - 2j that has magnitude 7 units. November 5, 2021 Category: Chapter 10 - Vector Algebra , Maths , NCERT Exemplar Class [...]

Example 6 Find unit vector in the direction of vector a = 2i + 3j + k Example 6 Find unit vector in the direction of vector a = 2i + 3j + k November 5, 2021 Category: Chapter 10 - Vector Algebra , Maths , NCERT Exemplar Class 12 ,

Example 5 Let a= i + 2j and b = 2i + j. Is IaI = IbI ? Are the vectors equal? Example 5 Let a= i + 2j and b = 2i + j. Is IaI = IbI ? Are the vectors equal? November 5, 2021 Category: Chapter 10 - Vector Algebra , Maths [...]

Example 4 Find the values of x, y and z so that the vectors a = xi + 2j + zk and b = 2i + yj + k are equal. Example 4 Find the values of x y and z so that the vectors a = xi + 2j + zk and b = [...]

Example 3 In Fig 10.5, which of the vectors are: (i) Collinear (ii) Equal (iii) Coinitial Example 3 In Fig 10.5 which of the vectors are: (i) Collinear (ii) Equal (iii) Coinitial November 5, 2021 Category: Chapter 10 - Vector Algebra , Maths , NCERT Exemplar Class 12 ,

Example 2 Classify the following measures as scalars and vectors. (i) 5 seconds (ii) 1000 cm^3 (iii) 10 Newton (iv) 30 km/hr (v) 10 g/cm^3 (vi) 20 m/s towards north Example 2 Classify the following measures as scalars and vectors. (i) 5 seconds (ii) 1000 cm^3 (iii) 10 Newton (iv) 30 km/hr (v) 10 g/cm^3 [...]

Example 1 Represent graphically a displacement of 40 km, 30° west of south. Example 1 Represent graphically a displacement of 40 km 30° west of south. November 5, 2021 Category: Chapter 10 - Vector Algebra , Maths , NCERT Exemplar Class 12 ,

10. The number lock of a suitcase has 4 wheels, each labelled with ten digits i.e., from 0 to 9. The lock opens with a sequence of four digits with no repeats. What is the probability of a person getting the right sequence to open the suitcase? 10. The number lock of a suitcase has [...]

9. If 4-digit numbers greater than 5,000 are randomly formed from the digits 0, 1, 3, 5, and 7, what is the probability of forming a number divisible by 5 when, (i) the digits are repeated? (ii) the repetition of digits is not allowed? (i) the digits are repeated? (ii) the repetition of digits is [...]

8. From the employees of a company, 5 persons are selected to represent them in the managing committee of the company. Particulars of five persons are as follows: A person is selected at random from this group to act as a spokesperson. What is the probability that the spokesperson will be either male or over [...]