Find the value of λ for which the vectors  and  are perpendicular ?

  1. - 9
  2. 9
  3. - 3
  4. 3

Answer (Detailed Solution Below)

Option 1 : - 9
Free
General Knowledge for All Defence Exams (शूरवीर): Special Live Test
20 Qs. 20 Marks 16 Mins

Detailed Solution

Download Solution PDF

CONCEPT:

If vectors  are perpendicular then 

CALCULATION:

Given:  and  are perpendicular

∵  and  are perpendicular

⇒ λ + 9 = 0

⇒ λ = - 9

Hence, option A is the correct answer.

Latest Airforce Group X Updates

Last updated on Jun 30, 2025

->Indian Airforce Agniveer (02/2026) Notification has been released. Interested candidates can apply between 11th July to 31st July 2025.

->The Examination will be held 25th September 2025 onwards.

-> Earlier, Indian Airforce Agniveer Group X 2025 Last date had been extended.

-> Candidates applied online from 7th to 2nd February 2025.

-> The online examination was conducted from 22nd March 2025 onwards.

-> The selection of the candidates will depend on three stages which are Phase 1 (Online Written Test), Phase 2 ( DV, Physical Fitness Test, Adaptability Test), and Phase 3 (Medical Examination).

-> The candidates who will qualify all the stages of selection process will be selected for the Air Force Group X posts & will receive a salary ranging of Rs. 30,000.

-> This is one of the most sought jobs. Candidates can also check the Airforce Group X Eligibility here.

More Vector Algebra Questions

Hot Links: teen patti glory teen patti 500 bonus teen patti club apk teen patti chart