Class 12 Math: Vector Algebra Important Exam Questions

Preparing for school exams or final CBSE boards requires practicing questions patterned after official grading schemes. We have compiled a list of crucial questions for Class 12 Vector Algebra to help you test your mastery.

Exam-Pattern Questions and Answers

Question 1 (EASY)

• Option 1: 0
• Option 2: 12
• Option 3: 12 13
• Option 4: 12 13 -

Solution Explanation & Steps: (a) 0

Question 2 (EASY)

• Option 1: 0
• Option 2: 1
• Option 3:
• Option 4: -

Solution Explanation & Steps: (d) -

Question 3 (MEDIUM)

This is a descriptive problem. Work out all steps on paper before checking the solution.

Solution Explanation & Steps: . . . . 0 .( ) 0a b a c a b a c a b c= ⇒ - = ⇒ - = ⃗ ⃗ ⃗ ⃗ ⃗ ⃗ ⃗ ⃗ ⃗ ⃗ ⃗ 0; ( )a b c or a b c⇒ = = ^ - ⃗ ⃗ ⃗ ⃗ ⃗ ⃗ ⃗ As, 0;a b c≠ ≠ ⃗ ⃗ ⃗ ⃗ ∴ the angle between a ⃗ and b c- ⃗ ⃗ is 2 π SECTION - C Questions 26 to 31 carry 3 marks each.

Grading Step-Marking Guidelines

Remember that teachers award partial marks for writing down formulas, stating the given variables, and drawing diagrams. Never leave a question blank on an exam. Write down the relevant formulas and initial substitution steps to secure partial credits.