Home
Class 12
PHYSICS
A 25 W and a 100 W bulb are joined in se...

A `25 W and a 100 W` bulb are joined in series and connected to the mains. Which bulb will glow brighter?

A

`25 W` bulb

B

`100 W` bulb

C

Both will have equal incandescence.

D

Neither will give light.

Text Solution

Verified by Experts

The correct Answer is:
A
As both bulbs are in series , current through them will be the same . But resistance of `25 W` bulb is more. Hence, from the relation `P = I^(2) R`, the ` 25 W` bulb will glow more brightly.
Promotional Banner

Topper's Solved these Questions

  • HEATING EFFECT OF CURRENT

    CENGAGE PHYSICS ENGLISH|Exercise Multiple Correct|5 Videos

  • HEATING EFFECT OF CURRENT

    CENGAGE PHYSICS ENGLISH|Exercise Assertion - Reasoning|6 Videos

  • HEATING EFFECT OF CURRENT

    CENGAGE PHYSICS ENGLISH|Exercise Subjective|8 Videos

  • GEOMETRICAL OPTICS

    CENGAGE PHYSICS ENGLISH|Exercise Integer Type|4 Videos

  • INDUCTANCE

    CENGAGE PHYSICS ENGLISH|Exercise Concept Based|8 Videos

Similar Questions

Explore conceptually related problems

A 25W and 100W bulbs are joined in series and connected to the mains. Which bulb will glow brighter?

A 25 W, 220 V bulb and a 100 W , 220 V bulb are connected in series across a 220 V line , which electric bulb will glow brightly?

60 W, 100 W and 1000 W bulbs are connected in parallel to the mains. The bulb that will be brightest is (all of them have same specified voltage)

Two bulbs having rating of 60 W, 220 V and 100 W, 220 V are joined (i) in series, (ii) in parallel. Which of the two will glow brighter in each case?

An electric bulb rated 220 V and 60 W is connected in series with another electric bulb rated 220 V and 40 W . The combination is connected across a source of emf 220 V . Which bulb will glow more?

Two electic bulbs marked 25 W -220 V and 100 W - 220 V are connected in series to a 440 V supply. Which of the bulbs will fuse?

A heater joined in series with a 50 W bulb is connected to the mains . If the 50 W bulb is replaced by a 100 W bulb , then will the heater now give more heat , less heat, or same heat ? Why ?

Two bulbs, when connected in series, are brighter than a single bulb.

Two bulbs are marked 200 V, 300 W and 200 V, 600 W , respectively. The bulbs are connected in series and the combination is connected to a 200 V supply . (a) Which bulb will produce more illumination ? (b) Find the total power consumed by both the bulbs. (c ) Find the total power consumed if both the bulbs were connected in parallel.

Three bulbs of specifications 60W-220V, 100W-220V and 1000W-220V are connected in series. Which one will glow the brightest ?

CENGAGE PHYSICS ENGLISH-HEATING EFFECT OF CURRENT-Single Correct
  1. Four resistances carrying a current shown in Fig. 7.41 are immersed in...

    Text Solution

    |

  2. The three resistance of equal value are arranged in the different comb...

    Text Solution

    |

  3. An ideal gas is filled in a closed rigid and thermally insulated conta...

    Text Solution

    |

  4. The resistance in which the maximum heat is produced is given by ( Fig...

    Text Solution

    |

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

    Text Solution

    |

  6. The resistance of the filament of a lamp increases with the increase i...

    Text Solution

    |

  7. A wire of length L and three identical cell of negligible internal res...

    Text Solution

    |

  8. An electric immersion heator of 1.08 k W is immersed in water. After t...

    Text Solution

    |

  9. Two electric bulbs A and B are rated 60 and 100 W, respectively. If th...

    Text Solution

    |

  10. A 25 W and a 100 W bulb are joined in series and connected to the main...

    Text Solution

    |

  11. Two identical electric heaters each marked 1000 W 220 V are connected ...

    Text Solution

    |

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

    Text Solution

    |

  13. If a wire of resistance 20 Omega is covered with ice and a voltage of ...

    Text Solution

    |

  14. How many 60 W lamps may be safely run on a 230 V circuit fitted with ...

    Text Solution

    |

  15. It takes 16 min to boil some water in an electric kettle. Due to some ...

    Text Solution

    |

  16. A electric kettle ( rated accurately at 2.5 kW) is used to heat 3 kg o...

    Text Solution

    |

  17. a factory is served by a 220 V supply line . In a circuit protected by...

    Text Solution

    |

  18. If a given volume of water in a 220 V heater is boiled in 5 min, then...

    Text Solution

    |

  19. The charge flowing through a resistance R varies with time t as Q = a...

    Text Solution

    |

  20. A 100 W bulb designed to operate on 100 V is to be connected across a ...

    Text Solution

    |