Home
Class 11
PHYSICS
A vector is multiplied by (-2) .As a re...

A vector is multiplied by (-2) .As a result

A

magnitude of the vector is doubled and direction is unaltered

B

magnitude of the vector remains the same and direction is reversed

C

magnitude of the vector is doubled and direction is reversed

D

no change in magnitude or direction of the vector

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • VECTOR

    CHHAYA PUBLICATION|Exercise EXERCISE (Very Short Answer Type Questions)|25 Videos

  • VECTOR

    CHHAYA PUBLICATION|Exercise EXERCISE (Short Answer Type Questions-I)|11 Videos

  • VECTOR

    CHHAYA PUBLICATION|Exercise Higher Order Thinking Skill (Hots) Questions|28 Videos

  • THERMOMETRY

    CHHAYA PUBLICATION|Exercise EXAMINATION ARCHIEVE - WBJEE|1 Videos

  • VISCOSITY AND SURFACE TENSION

    CHHAYA PUBLICATION|Exercise EXERCISE (CBSE SCANNER)|9 Videos

Similar Questions

Explore conceptually related problems

Virus multiplies in

Lichens multiply by

Lichens multiply by

Virus multiplies in

How does a vector change when it is multiplied by a scalar ?

The variance of 20 observations is 5. If each observation is multiplied by 2, find the new variance of the resulting observations.

Let sigma be the standard deviation of n observations. Each of the n observation is multiplied by a constant c. Then the standard deviation of the resulting numbers is

Two vectors of magnitude 3 and 4 give a resultant of magnitude 5 . What is the dot product of the two vectors?

Two vectors of magnitude 4 and 5 give a resultant of magnitude 9 . What is the cross product of given vectors?

The mean and standard deviation of six observations are 8 and 4, respectively. If each observation is multiplied by 3, find the new mean and new standard deviation of the resulting observations

CHHAYA PUBLICATION-VECTOR-EXERCISE (Multiple Choice Questions)
  1. An aeroplane is flying with a velocity of 216 km/h at an altitude of 1...

    Text Solution

    |

  2. The initial velocity and the acceleration of a particle are vecu=3hati...

    Text Solution

    |

  3. The equations of motion of a projectile are x=36 t and 2y=96t-9.8 t^2....

    Text Solution

    |

  4. Two projectiles, projected with angles (45^@- theta) and (45^@+theta)...

    Text Solution

    |

  5. For a projectile, ("horizontal range")^2 =48xx("maximum height")^2 ...

    Text Solution

    |

  6. Two railway tracks are paraller to west-east direction . Along one tra...

    Text Solution

    |

  7. Angle between the vectors hati +hatj and hati-hatk is

    Text Solution

    |

  8. A vector is multiplied by (-2) .As a result

    Text Solution

    |

  9. In a clockwise system

    Text Solution

    |

  10. A vector vecP=3hati-2hatj+ahatk is perpendicular to the vector vecQ=2h...

    Text Solution

    |

  11. For any two vectors vecA and vecB, if vecA*vecB=|vecAxxvecB| , the mag...

    Text Solution

    |

  12. vecA*vecA=?

    Text Solution

    |

  13. A vector perpendicular to both of (3hati+hatj+2hatk) and (2hati-2hatj...

    Text Solution

    |

  14. A vector normal to acos theta hati+b sin thetahatj is

    Text Solution

    |

  15. A vector vecA of magnitude 2 units is inclined at angles 30^@ and 60^...

    Text Solution

    |

  16. For what values of a and b , the vector (ahati+bhatj) will be a unit ...

    Text Solution

    |

  17. Two billiard balls, starting from the same point, have velocities (ha...

    Text Solution

    |

  18. If |vecAxxvecB|=sqrt(3)vecA*vecB, then |vecA+vecB|=?

    Text Solution

    |

  19. The vector product of vecA and vecB is zero . The scalar product of ve...

    Text Solution

    |

  20. If vecA*vecB=vecA*vecC=0 , then the vector parallel to vecA would be

    Text Solution

    |