Home
Class 12
PHYSICS
It has been proposed to use large induct...

It has been proposed to use large inductors as energy storage devices.
a. How much electrical energy is converted to light and thermal energy by a `200 - Omega` light bulb in one day?
b. If the amount of energy calculated in part (a) is stored in an inductor in which the current is `80.0 A`, what is the inductance?

Text Solution

Verified by Experts

a. `U = Pt = (200 W)(24 h//day) xx 3600 s//h) = 1.728 xx 10^(7) J`
b. `U = (1)/(2) LI^(2) rArr L = (2U)/(I^(2)) = (2(1.728 xx 10^(7)J))/((80.0 A)^(2) = 5400 H`
Promotional Banner

Topper's Solved these Questions

  • INDUCTANCE

    CENGAGE PHYSICS ENGLISH|Exercise Exercises (subjective)|7 Videos

  • INDUCTANCE

    CENGAGE PHYSICS ENGLISH|Exercise Exercises (single Correct )|65 Videos

  • INDUCTANCE

    CENGAGE PHYSICS ENGLISH|Exercise Solved Examples|3 Videos

  • HEATING EFFECT OF CURRENT

    CENGAGE PHYSICS ENGLISH|Exercise Thermal Power in Resistance Connected in Circuit|27 Videos

  • MAGNETIC FIELD AND MAGNETIC FORCES

    CENGAGE PHYSICS ENGLISH|Exercise Multiple Correct Answer type|2 Videos

Similar Questions

Explore conceptually related problems

Calculate the energy stored in an inductor of inductance 50 mH when a current of 2.0 A is passed through it.

Which device converts light energy to electrical energy?

If 0.1 J of energy is stored for the flow of the current of 0.2 A in an inductor, then its inductance value (in H) is

In what form is the energy stored in an inductor or A coil of inductance L is carrying a steady current i . What is the nature of its stored energy

An electric bulb of 60 W is used for 6 h per day. Calculate the units of energy consumed in one day by the bulb.

A bulb of power 40 W is used for 12.5 h each day for 30 days. Calculate the electrical energy consumed.

(a) Why is electric energy considered most desirable forms of energy ? (b) Name two devices which convert electric energy into : (i) heat energy only (ii) heat and light energy. (iii) mechanical energy (iv) magnetic energy.

An L-C-R series circuit with L = 0.120 H, R = 240 a , and C = 7.30muF carries an rms current of 0.450 A with a frequency of 400 Hz . (a) What are the phase angle and power factor for this circuit? (b) What is the impedance of the circuit? (c) What is the rms voltage of the source? (d) What average power is delivered by the source? (e) What is the average rate at which electrical energy is converted to thermal energy in the resistor? (f) What is the average rate at which electrical energy is dissipated ( converted to other forms) in the capacitor? (g) In the inductor ?

Prove the energy stored in a current inductor, per unit volume is (B^(2))/(2mu_(0)) , where B is the magnetic field inside the inductor.

Consider the RL circuit in Fig. When the switch is closed in position 1 and opens in position 2 , electrical work must be performed on the inductor and on the resistor. The energy stored in the inductor is for the resistor energy appears as heat. a. What is the ratio of P_(L)//P_(R ) of the rate at which energy is stored in the inductor to the rate at which energy is dissipated in the resistor? b. Express the ratio P_(L)//P_(R ) as a function of time. c. If the time constant of circuit is t , what is the time at which P_(L) = P_(R ) ?

CENGAGE PHYSICS ENGLISH-INDUCTANCE-Exercise 4.1
  1. A magentic field directed into the page changes with time according to...

    Text Solution

    |

  2. Figure shows an LCR circuit. When the switch is closed, the currents t...

    Text Solution

    |

  3. It has been proposed to use large inductors as energy storage devices....

    Text Solution

    |

  4. A 1 -k Omega resistor is connected in series with a 10-mH inductor, a ...

    Text Solution

    |

  5. A capacitor with capacitance 6 xx 10^(-5) F is charged by connecting i...

    Text Solution

    |

  6. In the circuit shows in Fig. , E = 10 V, R(1) = 5 Omega, R(2) = 10 Ome...

    Text Solution

    |

  7. In Fig. the switch is closed and steady-state conditions are establish...

    Text Solution

    |

  8. The switch in figure is closed at time t = 0. Find the current in the ...

    Text Solution

    |

  9. AB is a part of circuit. Find the potential difference V(A) - V(B) if ...

    Text Solution

    |

  10. A circuit contains an ideal cell and an inductor with a switch. Initia...

    Text Solution

    |

  11. In the following circuit (Fig.) the switch is closed at t = 0. Find th...

    Text Solution

    |

  12. In a circuit S(1) remains closed for a long time and S(2) remain open....

    Text Solution

    |

  13. At t = 0, switch S is closed (shown in Fig.). After a long time, sudde...

    Text Solution

    |

  14. Which of the two curves shows has lesser time constant.

    Text Solution

    |

  15. Two insulated wires are wound on the same hollow cylinder, s as to fro...

    Text Solution

    |

  16. Find the mutual inductance of two concentric coils of radii a(1) and a...

    Text Solution

    |

  17. Solve problem 19 if the planes of the coils are perpendicular.

    Text Solution

    |

  18. Find the mutual inductance of two concentric coils of radii a(1) and a...

    Text Solution

    |

  19. Figure. shows two concentric coplanar coils with radii a and b(alt lt...

    Text Solution

    |

  20. Figure. shows two concentric coplanar coils with radii a and b(alt lt...

    Text Solution

    |