Home
Class 10
PHYSICS
The figure below shows a variable resist...

The figure below shows a variable resistor in a dimmer switch.

How would you turn the switch to make the lights: (a) brighter, and (b) dimmer? Explain your answer.

Text Solution

Verified by Experts

The correct Answer is:
(a) Turn the switch to right side (b) Turn the switch to left side.
Promotional Banner

Topper's Solved these Questions

  • ELECTRICITY

    LAKHMIR SINGH & MANJIT KAUR|Exercise Very Short Answer Type Questions|1 Videos

  • ELECTRICITY

    LAKHMIR SINGH & MANJIT KAUR|Exercise Short Answer Type Questions|2 Videos

  • ELECTRICITY

    LAKHMIR SINGH & MANJIT KAUR|Exercise Sample Problem|1 Videos

  • MAGNETIC EFFECT OF ELECTRIC CURRENT

    LAKHMIR SINGH & MANJIT KAUR|Exercise NCERT BOOK|2 Videos

Similar Questions

Explore conceptually related problems

Fresh milk has a pH of 6. How do you think the pH will change as it turns into curd? Explain your answer.

In the circuit shown in the figure the neon lamp lights up if potential difference across it becomes 60 V and goes out if the potential difference falls below 30 V. The inductor coil has a very small resistance and emf of the cell is V = 4 volt. The lamp does not light when the switch is closed. The neon light flashes once when the switch is opened. Explain why?

LAKHMIR SINGH & MANJIT KAUR-ELECTRICITY -Exercise
  1. How do you think the brightness of two lamps arranged in parallel comp...

    Text Solution

    |

  2. If current flows through two lamps arranged: (a) in series, (b) in...

    Text Solution

    |

  3. The figure below shows a variable resistor in a dimmer switch. Ho...

    Text Solution

    |

  4. State two factors on which the electrical energy consumed by an electr...

    Text Solution

    |

  5. Which one has a higher electrical resistance: a 100 watt bulb or a 60 ...

    Text Solution

    |

  6. COMMERCIAL UNIT OF ENERGY

    Text Solution

    |

  7. An electric bulb is rated at 220V, 100W. What is its resistance?

    Text Solution

    |

  8. What is the SI unit of (i) electric energy, and (ii) electric power?

    Text Solution

    |

  9. Distinguish between kilowatt and kilowatt hour.

    Text Solution

    |

  10. Name the physical quantity whose unit is watt.

    Text Solution

    |

  11. What is the meaning of the symbol kWh? Which quantity does it represen...

    Text Solution

    |

  12. If the potential difference between the end of a wire of mixed resista...

    Text Solution

    |

  13. An electric lamp is labelled 12V, 36W. This indicates that it should b...

    Text Solution

    |

  14. What current will be taken by a 920 W appliance if the supply voltage ...

    Text Solution

    |

  15. Define watt. Write down an equation linking watts, volts and amperes.

    Text Solution

    |

  16. Define watt-hour. How many joules are equal to 1 watt-hour?

    Text Solution

    |

  17. How much energy is consumed when a current of 5 amperes flows through ...

    Text Solution

    |

  18. An electric bulb is connected to a 220V power supply line. If the bulb...

    Text Solution

    |

  19. In which of the following cases more electrical energy is consumed per...

    Text Solution

    |

  20. An electric kettle rated at 220V, 2.2kW, works for 3 hours. Find the e...

    Text Solution

    |