Home
Class 12
PHYSICS
A coil of inductanece 5H is joined to a ...

A coil of inductanece `5H` is joined to a cell of emf `6V` through a resistance `10 Omega` at time t=0. The emf across the coil at time `t=ln sqrt(2)` s is:

A

3 V

B

1.5 V

C

0.75 V

D

4.5 V

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • NTA NEET SET 40

    NTA MOCK TESTS|Exercise PHYSICS|45 Videos
  • NTA NEET SET 42

    NTA MOCK TESTS|Exercise PHYSICS|45 Videos

Similar Questions

Explore conceptually related problems

At t=0 , an inductor of zero resistance is joined to a cell of emf varepsilon through a resistance. The current increases with a time constant tau . The emf across the coil after time t is

An inductor of 3H is connected to a battery of emf 6V through a resistance of 100 Omega . Calculate the time constant. What will be the maximum value of current in the circuit ?

A voltmeter has a resistance of 50 Omega is connected across a cell of e.m.f. 2V and internal resistance 10 Omega . The reading of voltmeter is

A coil of self-inductance 15 H is connected to a battery of 10 V through a 5 Omega resistor and a switch. The switch is suddenly opened in 2 ms. Calculate the average emf induced in the coil.

An inductor coil of resistance 10 Omega and inductance 120 mH is connected across a battery of emf 6 V and internal resistance 2 Omega . Find the charge which flows through the inductor in (a) 10 ms, (b) 20ms and (c ) 100ms after the connections are made.

A coil of inductance 0.20 H is connected in series with a switch and a cell of emf 1.6 V . The total resistance of the circuit is 4.0 Omega . What is the initial rate of growth of the current when the switch is closed?

An inductor coil stores 16 joules of energy and dissipates energy as heat at the rate of 320 W when a current of 2 Amp is passed through it. When the coil is joined across a battery of emf 20V and internal resistance 20Omega the time constant for the circuit is tau . Find 100tau ( in seconds).

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 the time.

A coil has a iductance of 0.7H and is joined in series with a resistance of 220 Omega . When an alternating emf of 220V at 50 cps is applied to it, then the wattless component of the current in the circuit is (take 0.7 = 2.2)

A battery of emf 2V and internal resistance 0.5(Omega) is connected across a resistance in 1 second?

NTA MOCK TESTS-NTA NEET SET 41-PHYSICS
  1. The ratio of the resistances of a conductor at a temperature of 15^(@)...

    Text Solution

    |

  2. A power transmission line feeds input power at 2300 V a step down tran...

    Text Solution

    |

  3. A coil of inductanece 5H is joined to a cell of emf 6V through a resis...

    Text Solution

    |

  4. A uniform charged hemisphere of radius b and charge density rho has a ...

    Text Solution

    |

  5. A charge 'Q' is distributed over two concentric hollow spheres of radi...

    Text Solution

    |

  6. A battery of emf 12 V and internal resistance 2Omega is connected in s...

    Text Solution

    |

  7. A projectile of mass m is fired from the surface of the earth at an an...

    Text Solution

    |

  8. A satellite of mass m is launched vertically upwards with an initial s...

    Text Solution

    |

  9. The intensity of radiation emitted by the sun has its maximum value at...

    Text Solution

    |

  10. A cylindrical rod of length l and cross - sectional radius r is placed...

    Text Solution

    |

  11. The state of an ideal gas changed as shown, at constant temperature T0...

    Text Solution

    |

  12. The pressure and volume of an ideal gas are related as p alpha 1/v^2 ...

    Text Solution

    |

  13. A cylindrical wire of radius R has current density varying with distan...

    Text Solution

    |

  14. A current I is flowing through the loop , as shown in the figure . The...

    Text Solution

    |

  15. On a particle moving on a circular path with constant speed v, light i...

    Text Solution

    |

  16. A fighter plane enters inside the enemy territory, at time t=0, with v...

    Text Solution

    |

  17. Three blocks are connected as shown in the figure. Valculate the minim...

    Text Solution

    |

  18. Two blocks A and B of masses m and 2m, respectively , are held at rest...

    Text Solution

    |

  19. A radioactive nucleus (initial mass number A and atomic number Z) emit...

    Text Solution

    |

  20. Ne nucleus , the after absorbing energy , decays into two alpha parti...

    Text Solution

    |