Home
Class 12
PHYSICS
Radius of a circular ring is changing wi...

Radius of a circular ring is changing with time and the coil is placed in uniform magnetic field perpendicular to its plane. The variation of 'r' with time 't' is shown in Fig. Then induced emf e with time t will be best represented by

A

B

C

D

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • ALTERNATING CURRENT

    DC PANDEY|Exercise Level 2 Subjective|10 Videos

  • ATOMS

    DC PANDEY|Exercise MEDICAL ENTRANCES GALLERY|42 Videos

Similar Questions

Explore conceptually related problems

A flexible wire bent in the form of a circle is placed in a uniform magnetic field perpendicular to the plane of the coil. The radius of the coil changing as shown in figure. The graph of induced emf in the coil is represented by

A flexible wire bent in the form of a circle is place in a uniform magnetic field perpendicularly to the plane of the coil. The radius of the coil changes as shown in Figure. The graph of magnetude of induced emf in the coil is represented by

The current i in a coil varies with time as shown in the figure. The variation of induced emf with time would be

A current (I) carrying circular wire of radius R is placed in a magnetic field B perpendicular to its plane. The tension T along the circumference of the wire is

A rectangular coil is placed in a region having a uniform magnetic field B perpendicular to the plane of the coil. An emf will not be induced ion the coil if the

A conducting ring is placed in a uniform magnetic field with its plane perpendicular to the field . An emf is induced in the ring if

Find the emf induced in the coil shown in figure.The magnetic field is perpendicular to the plane of the coil and is constant.

Find the emf induced in the coil shown in figure. The magnetic field is perpendicular to the plane of the coil and is constant.

DC PANDEY-ALTERNATING CURRENT-JEE MAIN
  1. A reacangular loop if size (2m xx 1m) is placed in x-y plane. A unifor...

    Text Solution

    |

  2. State wheather the following two statement are true or false

    Text Solution

    |

  3. Radius of a circular ring is changing with time and the coil is placed...

    Text Solution

    |

  4. r.m.s. value of current i=3+4sin (omegat+pi//3) is

    Text Solution

    |

  5. An AC voltage of V=220sqrt2 sin (100pit+(pi)/(2))V is applied across a...

    Text Solution

    |

  6. A direct current of 2 A and an alternating current having a maximum va...

    Text Solution

    |

  7. By what percentage the impedance in an AC series circuit should be inc...

    Text Solution

    |

  8. A power transformer (step up) with an 1:8 turns ratio has 60 Hz,120 V ...

    Text Solution

    |

  9. A choke coil has.

    Text Solution

    |

  10. Comparing the L-C oscillations with the oscillations of a spring-block...

    Text Solution

    |

  11. A capacitor of capacity 2muF is changed to a potential different of 12...

    Text Solution

    |

  12. The power factor of the circuit in fig. is 1//sqrt(2). The capacitance...

    Text Solution

    |

  13. An ac-circuit having supply voltage E consists of a resistor of resis...

    Text Solution

    |

  14. In series LR circuit, X(L) = 3 R. Now a capacitor with X(C ) = R is ad...

    Text Solution

    |

  15. For L-R circuit, the time constant is equal to

    Text Solution

    |

  16. Dimensions of underset("electric flux")overset("magnetic flux") to are

    Text Solution

    |

  17. A current of 2A is increasing at a rate of 4A//s through a coil of ind...

    Text Solution

    |

  18. In an LR circuit, current at t=0 is 2A . After 2s it reduced to 18A. T...

    Text Solution

    |

  19. A coil of inductance 1H and neligible resistance is connected to a sou...

    Text Solution

    |

  20. The ratio of time constant during current growth and current decay of...

    Text Solution

    |