Home
Class 12
PHYSICS
A coil having n turns and resistance R O...

A coil having `n` turns and resistance `R Omega` is connected with a galvanometer of resistance `4 R Omega`. This combination is moved in time t seconds from a magnetic field `B_1` wber to `B_2` Weber. The induced current in the circuit is:

A

`(B_2-B_1)/(5 R nt)`

B

`-(n(B_2-B_1))/(5 R t)`

C

`-(B_2-B_1)/(R nt)`

D

`-(n(B_2-B_1))/(R t)`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • TEXTUAL QUESTIONS

    MODERN PUBLICATION|Exercise EXERCISE|507 Videos

  • STRUCTURE OF NUCLEUS

    MODERN PUBLICATION|Exercise EXERCISE|47 Videos

  • TEXUAL QUESTIONS

    MODERN PUBLICATION|Exercise EXERCISE|195 Videos

Similar Questions

Explore conceptually related problems

A circular coil of radius r and of negligible resistance is connected to a resistor of resistor R through is connected to a resistor of resistance R rough a key. A time varying magnetic field B(t) = Be^-t established inside the coil. After a time t of closing key, find the induced current in the circuit

A coil of inductance 8.4 mH and resistance 6 Omega is connected to a 12 V battery. The current in the coil is 1.0 A at approximately time:

An unknown resistance R_(1) is connected is series with a resistance of 10 Omega. This combination is connected to one gap of a meter bridge, while other gap is connected to another resistance R_(2) . The balance point is at 50 cm Now , when the 10 Omega resistance is removed, the balanced point shifts to 40 cm Then the value of R_(1) is.

A moving coil galvanometer of resistance 100Omega is used as an ammeter using a resistance 0.1 Omega . The maximum diflection current in the galvanometer is 100 muA . Find the minimum current in the circuit so that the ammeter shows maximum deflection

How can three resistors of resistance 2 Omega 3 Omega and 6 Omega be connected to give a total resistance of (a) 4 Omega (b) 1 Omega ?

A circular coil of radius r and of negligible resistance is connected to a resistor of resistor R through is connected to a resistor of resistance R rough a key. A time varying magnetic field B(t) = Be^-t established inside the coil. After a time t of closing key, the power dissipated across the resistor.

A resistor is connected to a battery of emf 10 V and internal resistance 0.3 Omega. What is the resistance of the resistor to be inserted in the circuit for the circuit current 1.2A?

A cell of emf E and internal resistance r is connected to external resistance R_1 and R_2 and a perfect ammeter. The current in the circuit is measured in four different situations. without any external resistance in the circuit with resistance R _1 only with R_1 and R_2 in parallel combination with R_1 and R_2 in series combination the currents measured in the four cases are 0.42 A, 1.05A, 1.4A adn 4.2 A, but not necessarily in that order. Identify the currents corresponding to the four case mentioned above.

Eight resistances each of 4 Omega are connected in the circuit as shown in fig. The equivalent resistance between A and B is:

MODERN PUBLICATION-TEXTUAL QUESTIONS-EXERCISE
  1. A coil having n turns and resistance R Omega is connected with a galva...

    Text Solution

    |

  2. For current entering at A, the electric field E(r at a distance r form...

    Text Solution

    |

  3. A material 'B' has twice the specific resistance of 'A'. A circular wi...

    Text Solution

    |

  4. The length of a given cylindrical wire is increased by 100%. Due to th...

    Text Solution

    |

  5. If a wire is stretched to make it 0.1% longer, its resistance of will

    Text Solution

    |

  6. An electric current is passed through a circuit containing two wires o...

    Text Solution

    |

  7. By increasing the temperature, the specific resistance of a conductor ...

    Text Solution

    |

  8. A strip of copper another of germanium are cooled from room temperatur...

    Text Solution

    |

  9. The difference in the variation o resistance with temperature in a met...

    Text Solution

    |

  10. The thermistors are usually made of

    Text Solution

    |

  11. The resistance of a bulb filmanet is 100Omega at a temperature of 100^...

    Text Solution

    |

  12. The resistance of a wire is 5 ohm at 50^@C and 6 ohm at 100^@C. The re...

    Text Solution

    |

  13. The resistance of hot tungsten filament is about 10 times the cold res...

    Text Solution

    |

  14. An electric bulb is rated 220 V and 100 W. when it is operated on 110 ...

    Text Solution

    |

  15. An 220 volt-1000 watt bulb is connected across a 110 volt mains supply...

    Text Solution

    |

  16. A heater coil is cut into two equal parts and only one part is now use...

    Text Solution

    |

  17. If in the circuit, power dissipation is 150 W, then R is

    Text Solution

    |

  18. A wire when connected to 220 V mains supply has power dissipation P1. ...

    Text Solution

    |

  19. The resistance of the series combination of two resistances is S. WHen...

    Text Solution

    |

  20. A 3 V battery with negligible internal resistance is connected in a ci...

    Text Solution

    |

  21. What will be the value of current through 2Omega resistance for the ci...

    Text Solution

    |