JEE Main 2024 Physics question
A vector has magnitude same as that of and is parallel to . The x and y components of this vector in first quadrant are x and 3 respectively where x = .
Answer: 4
Solution
The vector has magnitude 5 and direction B̂ = (4î + 3ĵ)/5, so it is 5B̂ = 4î + 3ĵ. So x = 4.