Answer : Option CExplaination / Solution: egative of ⃗ is equal to - ⃗ , i.e. A vector whose magnitude is the same as that of ⃗ ,but direction is opposite to that of ⃗ .
Q7.If P1(x1,y1,z1) and P2(x2,y2,z2) are any two points, then the vector joining P1 and P2 is the vector P1P2. Magnitude of the vector P1P2−→−− is
Answer : Option AExplaination / Solution: If P1(x1,y1,z1) and P2(x2,y2,z2) are any two points, then the vector joining P1 and P2 is the vector P1P2. then: P1P2−→−− =
Q8.If a⃗ ,b⃗ and c⃗ are any three vectors then the correct expression for distributivity of scalar product over addition is
Answer : Option DExplaination / Solution: If a⃗ ,b⃗ and c⃗ are any three vectors then the correct expression for distributivity of scalar product over addition is: