Home
Class 12
PHYSICS
The magnitude of the vector product of t...

The magnitude of the vector product of two vectors and may be : `overset(rarr)A` and `overset(rarr)B`

A

(a)greater than AB

B

(b)equal to AB

C

(c)less than AB

D

(d)equal to zero

Text Solution

AI Generated Solution

The correct Answer is:
To solve the problem regarding the magnitude of the vector product of two vectors \( \vec{A} \) and \( \vec{B} \), we need to understand the properties of vector products and how they relate to the magnitudes of the vectors involved. ### Step-by-Step Solution: 1. **Understanding Vector Product**: The vector product (or cross product) of two vectors \( \vec{A} \) and \( \vec{B} \) is given by the formula: \[ |\vec{A} \times \vec{B}| = |\vec{A}| |\vec{B}| \sin \theta \] where \( \theta \) is the angle between the two vectors. 2. **Magnitude of Vectors**: The magnitudes \( |\vec{A}| \) and \( |\vec{B}| \) are simply the lengths of the vectors \( \vec{A} \) and \( \vec{B} \). 3. **Range of Sine Function**: The sine function \( \sin \theta \) varies between -1 and 1, but since we are interested in the magnitude, we consider only the positive values: \[ 0 \leq \sin \theta \leq 1 \] 4. **Maximum and Minimum Values**: - The maximum value of \( |\vec{A} \times \vec{B}| \) occurs when \( \sin \theta = 1 \) (i.e., when \( \theta = 90^\circ \)): \[ |\vec{A} \times \vec{B}|_{\text{max}} = |\vec{A}| |\vec{B}| \] - The minimum value occurs when \( \sin \theta = 0 \) (i.e., when \( \theta = 0^\circ \) or \( 180^\circ \)): \[ |\vec{A} \times \vec{B}|_{\text{min}} = 0 \] 5. **Conclusion**: Therefore, the magnitude of the vector product \( |\vec{A} \times \vec{B}| \) can take any value in the range: \[ 0 \leq |\vec{A} \times \vec{B}| \leq |\vec{A}| |\vec{B}| \] 6. **Options Analysis**: Based on the above analysis, we can conclude that: - The magnitude of the vector product can be equal to zero (when the vectors are parallel). - The magnitude can be less than or equal to the product of the magnitudes of the vectors. ### Final Answer: The correct options regarding the magnitude of the vector product of \( \vec{A} \) and \( \vec{B} \) are: - It can be equal to \( 0 \). - It can be less than or equal to \( |\vec{A}| |\vec{B}| \).

To solve the problem regarding the magnitude of the vector product of two vectors \( \vec{A} \) and \( \vec{B} \), we need to understand the properties of vector products and how they relate to the magnitudes of the vectors involved. ### Step-by-Step Solution: 1. **Understanding Vector Product**: The vector product (or cross product) of two vectors \( \vec{A} \) and \( \vec{B} \) is given by the formula: \[ |\vec{A} \times \vec{B}| = |\vec{A}| |\vec{B}| \sin \theta \] ...
Promotional Banner

Topper's Solved these Questions

  • INTRODUCTION TO VECTORS & FORCES

    VMC MODULES ENGLISH|Exercise JEE Main ( ARCHIVE ) ( LEVEL-1)|12 Videos
  • INTRODUCTION TO VECTORS & FORCES

    VMC MODULES ENGLISH|Exercise JEE Advanced ( ARCHIVE LEVEL-2)|12 Videos
  • INTRODUCTION TO VECTORS & FORCES

    VMC MODULES ENGLISH|Exercise level 1|75 Videos
  • GRAVITATION

    VMC MODULES ENGLISH|Exercise JEE Advance (Archive) TRUE/FALSE|1 Videos
  • JEE MAIN - 5

    VMC MODULES ENGLISH|Exercise PART I : PHYSICS (SECTION - 2)|5 Videos

Similar Questions

Explore conceptually related problems

The magnitude of the vectors product of two vectors vecA and vecB may be

The magnitude of the vector product of two vectors vecA and vecB may not be:

The magnitude of the vectors product of two vectors |vecA| and |vecB| may be

Dot product of two vectors overset(rarr)A and overset(rarr)B is defined as overset(rarr)A.overset(rarr)B=AB cos phi , where phi is angle between them when they are drawn with tails coinciding. For any two vectors . This means ovsert(rarr)A . overset(rarr)B=overset(rarr)B. overset(rarr)A that . The scalar product obeys the commutative law of multiplication, the order of the two vectors does not matter. The vector product of two vectors overset(rarr)A and overset(rarr)B also called the cross product, is denoted by overset(rarr)A xx overset(rarr)B . As the name suggests, the vector product is itself a vector. overset(rarr)C=overset(rarr)A xx overset(rarr)B then C=AB sin theta , For non zero vectors overset(rarr)A, overset(rarr)B, overset(rarr)C,|(overset(rarr)Axxoverset(rarr)B).overset(rarr)C|=|overset(rarr)A||overset(rarr)B||overset(rarr)C| holds if and only if

Dot product of two vectors overset(rarr)A and overset(rarr)B is defined as overset(rarr)A.overset(rarr)B=aB cos phi , where phi is angle between them when they are drawn with tails coinciding. For any two vectors . This means overset(rarr)A . overset(rarr)B=overset(rarr)B. overset(rarr)A that . The scalar product obeys the commutative law of multiplication, the order of the two vectors does not matter. The vector product of two vectors overset(rarr)A and overset(rarr)B also called the cross product, is denoted by overset(rarr)A xx overset(rarr)B . As the name suggests, the vector product is itself a vector. overset(rarr)C=overset(rarr)A xx overset(rarr)B then C=AB sin theta , overset(rarr)A=hat i+ hat j-hatk and overset(rarr)B=2 hat i +3 hat j +5 hat k angle between overset(rarr)A and overset(rarr)B is

Dot product of two vectors overset(rarr)A and overset(rarr)B is defined as overset(rarr)A.overset(rarr)B=aB cos phi , where phi is angle between them when they are drawn with tails coinciding. For any two vectors . This means overset(rarr)A . overset(rarr)B=overset(rarr)B. overset(rarr)A that . The scalar product obeys the commutative law of multiplication, the order of the two vectors does not matter. The vector product of two vectors overset(rarr)A and overset(rarr)B also called the cross product, is denoted by overset(rarr)A xx overset(rarr)B . As the name suggests, the vector product is itself a vector. overset(rarr)C=overset(rarr)A xx overset(rarr)B then C=AB sin theta , A force overset(rarr)F=3hat i +c hat j + 2 hatk acting on a particle causes a displacement d=4hat i- 2 hat j + 3 hat k . If the work done (dot product of force and displacement) is 6J then the value of c is :

Projection of overset(rarr)P on overset(rarr)Q is :

Assertion -Magnitude of vector product of two vectors may be greater then , equal to or less than the scalar product . Reason At theta=45^(@) two are equal .

Let overset(rarr)C = overset(rarr)A+overset(rarr)B then :

(i) State the associative and commutative laws of vector addition. (ii) For two given vectors A=hat I + 2 hat j -3hat k , overset(rarr)B=2 hati -hat j + 3 hatk find the vector sum of overset(rarr)A and overset(rarr)B also find the magnitude of (overset(rarr)A+overset(rarr)B)

VMC MODULES ENGLISH-INTRODUCTION TO VECTORS & FORCES -level 2
  1. If particles A and B are moving with velocities overset(rarr)V(A) an...

    Text Solution

    |

  2. A stationary person observes that rain is falling vertically down at 3...

    Text Solution

    |

  3. The magnitude of the vector product of two vectors and may be : ov...

    Text Solution

    |

  4. If overset(rarr)A and overset(rarr)B are two vectors of non-zero ...

    Text Solution

    |

  5. What is the torque of a force overset(rarr)F=(2 hat i -3 hat j +4 hat ...

    Text Solution

    |

  6. If overset(rarr)A=2 hat i + 3 hat j- hat k and overset(rarr)B=-hat i...

    Text Solution

    |

  7. A block of mass M is kept in elevator (lift) which starts moving upwar...

    Text Solution

    |

  8. Consider a system of two vectors overset(rarr)a=3hat i +4 hat j, ove...

    Text Solution

    |

  9. The angle between vector (overset(rarr)Axxoverset(rarr)B) and (overset...

    Text Solution

    |

  10. Dot product of two vectors overset(rarr)A and overset(rarr)B is defi...

    Text Solution

    |

  11. Dot product of two vectors overset(rarr)A and overset(rarr)B is defi...

    Text Solution

    |

  12. Dot product of two vectors overset(rarr)A and overset(rarr)B is defi...

    Text Solution

    |

  13. Maximum and minimum values of the resultant of two forces acting at a ...

    Text Solution

    |

  14. A force ( 3 hati +4 hat j) newton acts on a body and displaces it by...

    Text Solution

    |

  15. If a vector 2 hat (i) + 3 hat(j) + 8 hat(k) is perpendicular to the ve...

    Text Solution

    |

  16. What is the torque of a force overset(rarr)F=(2 hat i -3 hat j +4 hat ...

    Text Solution

    |

  17. The magnitudes of the X and Y components of overset(rarr)P are 7 and...

    Text Solution

    |

  18. A car is going in south with a speed of 5m//s. To a man sitting in car...

    Text Solution

    |

  19. The area of parallelogram represented by the vectors overset(rarr)A =...

    Text Solution

    |

  20. The river 500 m wide is flowing with a current of 4kph. A boat starts ...

    Text Solution

    |