Home
Class 12
PHYSICS
In an AC circuit, the current is given b...

In an `AC` circuit, the current is given by `i=5sin(100t-(pi)/2)` and the `AC` potential is `V=200sin(100t)`volt. Then the power consumption is

A

100 W

B

40 W

C

20 W

D

0 W

Text Solution

Verified by Experts

The correct Answer is:
D
`overline(P)=(e_(0)I_(0))/(2)cosphi`
`=(e_(0)I_(0))/(2)cos90`
=0 W
Promotional Banner

Topper's Solved these Questions

  • ELASTICITY

    NIKITA PUBLICATION|Exercise MCQ|314 Videos

  • ELECTRONS AND PHOTONS

    NIKITA PUBLICATION|Exercise MCQs|162 Videos

Similar Questions

Explore conceptually related problems

In an AC circuit, the current is given by i=5sin(100t-(pi)/2) and the AC potential is V=200sin(100) volt. Then the power consumption is

In an A.C. circuit, the current flowing in inductance is I = 5 sin (100 t – pi//2) amperes and the potential difference is V = 200 sin (100 t) volts. The power consumption is equal to

In an A.C. Circuit, the current is given by I=6 sin(200 pi t+(pi)/6)A The initial value of the current is

In an alternating series circuit,current is i=100sin(100t)A and voltage is V=100sin(100t+π/6)v .The average power dissipated in the ac circuit is

In an AC circuit, the applied potential difference and the current flowing are given by V=20sin100tvolt,I=5sin(100t-pi/2) amp The power consumption is equal to

Voltage and current is an AC circuit are given by V=sin(100pit-(pi)/6) and I=4sin(100pit+(pi)/6)

Voltage applied to an AC circuit and current flowing in it is given by V=200sqrt2sin(omegat+pi/4) and i=-sqrt2cos(omegat+pi/4) Then, power consumed in the circuited will be

In an ac circuit the current is given by i=0.5 sin (314 t + 60^@) milliampere. Then peak to peak value of current is-

NIKITA PUBLICATION-ELECTROMAGNETIC INDUCTION-MCQs
  1. In figure which voltmeter reads zero when omega is equal to the resona...

    Text Solution

    |

  2. A varying current in a coil change from 10A to 0A in 0.5 sec. If the a...

    Text Solution

    |

  3. In an AC circuit, the current is given by i=5sin(100t-(pi)/2) and the ...

    Text Solution

    |

  4. A straight conductor of length 0.4 m is moved with a speed of 7 m/s pe...

    Text Solution

    |

  5. If a rate of change of current of 4 As^(-1) induces an emf of 20 mV in...

    Text Solution

    |

  6. When the number of turns and the length of the solenoid are doubled ke...

    Text Solution

    |

  7. A coil having effective area A, is held with its plane normal to a mag...

    Text Solution

    |

  8. The dimensions of magnetic flux are

    Text Solution

    |

  9. Which graph gives the correct relation between Z and f for the given R...

    Text Solution

    |

  10. In the given L-R circuit, which of the following gives correct relatio...

    Text Solution

    |

  11. Reactance of a capacitor of capacitance CmuF for ac frequency 400/pi H...

    Text Solution

    |

  12. In a coil, L=5H, current changes at the rate of 2 ampere per second. ...

    Text Solution

    |

  13. An alternating e.m.f. given by e=200 sin 50 t is applied to a circuit ...

    Text Solution

    |

  14. Flux passes through coil changes from 2xx10^(-3)Wb to 3xx10^(-3) Wb du...

    Text Solution

    |

  15. A conductor of length 10 cm is moved parallel to itself with a speed o...

    Text Solution

    |

  16. In an AC circuit containing only capacitance the current

    Text Solution

    |

  17. Wattless current is obtained

    Text Solution

    |

  18. For a coil of unit area, induction B is doubled in 0.2s. Then, the ind...

    Text Solution

    |

  19. Deal beat galvanometer works on the principle of

    Text Solution

    |

  20. The capacitive reactance is 20Omega, when the frequency is 100 Hz. Fin...

    Text Solution

    |