Home
Class 12
PHYSICS
Which of the following statements are co...

Which of the following statements are correct for moving charge as shown in figure:
A. Magnitude of electric field `E = 3/4 ((mV^2 )/(qa))`
B. Rate of change of work done at point A is ` 3/4 (mV^3 )/a`
C. Rate of change of work done by both fields at point B is zero
D. Change in angular momentum is `2maV`

A

A, B, C are correct

B

A, B, C, D are correct

C

A, B are correct

D

B, C, D are correct.

Text Solution

Verified by Experts

The correct Answer is:
A
NA
Promotional Banner

Topper's Solved these Questions

  • JEE MAIN 2021

    JEE MAINS PREVIOUS YEAR|Exercise PHYSICS SECTION B|30 Videos

Similar Questions

Explore conceptually related problems

If the rate of change of surface area of a sphere is 4m^2 /sec , then the rate of change of volume when the radius is 3m is.

Which among the following statements is true about the work done in bringing a unit positive charge from point P to Q in an electrostatic field ?

Which among the following statement is incorrect? (1) Momentum has both direction and magnitude (2) Momentum is a scalar quantity (3) Rate of change of momentum of an object is in direction of net force (4) Rate of change of momentum is a vector quantity.

A particle of charge +q and mass m moving under the influence of as uniform electric field Ehati and uniform magnetic field B hatk follows trajectory form P to Q as shown in figure. The velocities at P and Q re vhati and -2hatj . Which of the following statement(s) is/are correct? a. E=3/4[(mv^2)/(qa)] b. Rate of work done by the electrif field at P is 3/4[(mv^3)/a] c. Rate of work done by the electric field at P is zero. d. Rate of work done by both the field at Q is zero.

Charge +2Q and -Q are placed as shown in figure. The point at which electric field intensit is zero will be

A point charge is taken from a pint A to a pint B in an electric field. Does the work done by the electric field depend on the path of the charge ?

In the following diagram the work done in moving a point charge from point P to point A, B and C is respectively as W_(A), W_(B) and W_(C) , then

Charge 2Q and -Q are placed as shown in figure. The point at which electric field intensity is zero will be somewhere

Find the work done by some external force in moving a charge q=2muC from infinity to a point where electric potential is 10^4 V.

JEE MAINS PREVIOUS YEAR-JEE MAIN-All Questions
  1. For the given P-V graph for an ideal gas, chose the correct V-T graph....

    Text Solution

    |

  2. Given: vec p = - hati -3 hatj + 2hatk and vec r = hati + 3 hatj + 5ha...

    Text Solution

    |

  3. Which of the following statements are correct for moving charge as sho...

    Text Solution

    |

  4. Photons of wavelength 6556 A^@ falls on a metal surface. If ejected el...

    Text Solution

    |

  5. A rod of length 1 m is released from rest as shown in the figure below...

    Text Solution

    |

  6. If reversible voltage of 200 V is applied across an inductor, current ...

    Text Solution

    |

  7. A wire of length l = 3m and area of cross section 10^(-2) cm^2 and bre...

    Text Solution

    |

  8. Position of a particle as a function of time is given as x^2 = at^2 + ...

    Text Solution

    |

  9. In the given circuit both diodes are ideal having zero forward resista...

    Text Solution

    |

  10. A mass m attached to spring of natural length l0 and spring constant k...

    Text Solution

    |

  11. A loop of radius R and mass m is placed in a uniform magnetic field B ...

    Text Solution

    |

  12. A string of mass per unit length mu = 6 xx 10^(-3) kg/m is fixed at bo...

    Text Solution

    |

  13. Ratio of energy density of two steel rods is 1 : 4 when same mass is s...

    Text Solution

    |

  14. A particle is projected from the ground with speed u at angle 60^@ fro...

    Text Solution

    |

  15. H-like atom with ionization energy of 9R. Find the wavelength of light...

    Text Solution

    |

  16. Two planets of masses M and M/2 have radii R and R/2 respectively. If...

    Text Solution

    |

  17. Find centre of mass of given rod of linear mass density lambda=(a+b(x/...

    Text Solution

    |

  18. If a point source is placed at a depth h in a liquid of refractive ind...

    Text Solution

    |

  19. System is released from rest. Moment of inertia of pulley 'I'. Find an...

    Text Solution

    |

  20. Find the current supplied by the battery ?

    Text Solution

    |