Home
Class 12
PHYSICS
Figure 7.44 shows three similar lamps L(...

Figure `7.44` shows three similar lamps `L_(1) , L_(2), and L_(3)` connectged across a power supply. If the lamp ` L_(3)` fuses, how will the light emitted by `L_(1) and L_(2)` change?

A

no change

B

brilliance of `L_(1)` decreases and that of `L_(2)` increases

C

brilliance of both `L_(1) ` and `L_(2)` increases

D

brilliance of both `L_(1)` and `L_(2)` decreases

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    NARAYNA|Exercise Level 1 C.W|64 Videos
  • CURRENT ELECTRICITY

    NARAYNA|Exercise Level 1 H.W|63 Videos
  • CURRENT ELECTRICITY

    NARAYNA|Exercise Level 6|43 Videos
  • COMMUNICATION SYSTEM

    NARAYNA|Exercise Level-II(H.W)|25 Videos
  • DUAL NATURE OF RADIATION AND MATTER

    NARAYNA|Exercise ASSERTION AND REASON|15 Videos

Similar Questions

Explore conceptually related problems

figure-3.402 shows two lamps L_(1) and L_(2) in series and connected across 100 V battery. Find the power consumed by each lamp.

In the circuit shown in Fig. If both the lamps L_(1) and L_(2) are identical.

If lines l_(1), l_(2) and l_(3) pass through a point P, then they are called…………. Lines.

Let L_(1) and L_(2) be the foollowing straight lines. L_(1): (x-1)/(1)=(y)/(-1)=(z-1)/(3) and L_(2): (x-1)/(-3)=(y)/(-1)=(z-1)/(1) Suppose the striight line L:(x-alpha)/(l)=(y-m)/(m)=(z-gamma)/(-2) lies in the plane containing L_(1) and L_(2) and passes throug the point of intersection of L_(1) and L_(2) if the L bisects the acute angle between the lines L_(1) and L_(2) , then which of the following statements is /are TRUE ?

In the figure shown, there are two convex lenses L_(1) and L_(2) having focal. Lengths f_(1) and f_(2) respectively. The distance between L_(1) and L_(2) will be

The energies of three consecutive energy levels L_(3), L_(2) and L_(1) of hydrogen atom are E_(0), 4E_(0)/9 and E_(0)/4 respectively. A photon of wavelength lambda is emitted for a transition L_(3) to L_(1) . What will be the wavelength of emission for transition L_(2) to L_(1) ?

(a) Explain with reason, how the power of a diverging lens changes when (i) it is kept in a medium of refractive index greater than that of the lens, (ii) incident red light is replaced by violet light. (b) Three lenses L_(1), L_(2), L_(3) each of focal length 30 cm are placed co-axially as shown in the figure. An object is held at 60 cm from the optic center of lens L_(1) . The final real image is formal at the focus of L_(3) . Calculate the separation between (i) (L_(1) and L_(2)) and " (ii) " (L_(2) and L_(3)) .

NARAYNA-CURRENT ELECTRICITY-C.U.Q
  1. Two bulbs are fitted in a room in the domestic electric installation. ...

    Text Solution

    |

  2. Three identical bulbs P, Q and R are connected to a battery as shown i...

    Text Solution

    |

  3. Figure 7.44 shows three similar lamps L(1) , L(2), and L(3) connectged...

    Text Solution

    |

  4. The potential difference across a conductor is doubled, the rate of ge...

    Text Solution

    |

  5. Two metallic wires of same material and same length have different dia...

    Text Solution

    |

  6. There are two metallic wires of same material, same length but of diff...

    Text Solution

    |

  7. Two electric bulbs rated P(1) watt and V volt, are connected in series...

    Text Solution

    |

  8. In above question, if the bulbs are connected in parallel, total power...

    Text Solution

    |

  9. Which of the following causes production of heat, when current is set ...

    Text Solution

    |

  10. A constant voltage is applied between the two ends of a metallic wire ...

    Text Solution

    |

  11. A resistor R(1) dissipates the power P when connected to a certain gen...

    Text Solution

    |

  12. Back emf of a cell is due to

    Text Solution

    |

  13. The direction of current in a cell is

    Text Solution

    |

  14. When an electric cell drives current through load resistance, its back...

    Text Solution

    |

  15. The terminal voltage of a cell is greater tha its emf. When it is

    Text Solution

    |

  16. What is constant in a battery (also called a source of emf)?

    Text Solution

    |

  17. From the following the standard cell is

    Text Solution

    |

  18. A cell is to convert

    Text Solution

    |

  19. n identical calls, each of internal resistance (r) are first connected...

    Text Solution

    |

  20. The value of internal resistance of ideal cell is

    Text Solution

    |