CBSE Class 10 Answered
A battery is conected to 3 identical lamps P,Q and R as shown. Initially the switch S is kept open and lamps P and Q glow with some brightness. Then switch S is closed. How will the brightness of the lamps P and Q change ? Justify.
Asked by renukanancyqueen2015 | 18 Sep, 2015, 04:15: PM
Expert Answer
When the switched is closed, bulb Q and R are parallel to each other. The combined resistance of a parallel combination is less than the individual resistance.
So, the whole circuit consists of P in series with the parallel combination of Q and R. Thus, the bulb P will be brighter than the Q and R.
Answered by Yashvanti Jain | 20 Sep, 2015, 07:59: PM
Application Videos
-
Some other formulae for calculating power ...
This video shows explains the application of formula for calculating the po... -
Cost of electricity
This video describes the calculation of cost of electricity for electrical ... -
Combination of resistors -parallel
This video describes the calculation of effective resistance, total current... -
Combination of resistors -series
This video describes the calculation of electric current flowing through th... -
Current flowing in series combination
This video explains the assertion reason question based on the concept o...
Concept Videos
-
Electricity
Explain a series and a parallel combination of resistors in a circuit. Det... -
Electricity
Explain a series and a parallel combination of resistors in a circuit. Det... -
Electricity
Explain a series and a parallel combination of resistors in a circuit. Det... -
Resistances in series or parallel
This video describes the way to calculate the equivalent resistance for va... -
Resistances in series or parallel
This video describes the way to calculate the equivalent resistance for va...
CBSE 10 - Physics
Asked by kamalaranjanmohantymohanty5 | 06 Jan, 2024, 10:05: AM
ANSWERED BY EXPERTCBSE 10 - Physics
Asked by nandhikasugumar | 05 Oct, 2023, 04:01: PM
ANSWERED BY EXPERTCBSE 10 - Physics
Asked by daniya062008 | 02 Oct, 2023, 08:25: PM
ANSWERED BY EXPERTCBSE 10 - Physics
Asked by prassanna.j | 03 Sep, 2023, 12:28: PM
ANSWERED BY EXPERTCBSE 10 - Physics
Asked by prassanna.j | 03 Sep, 2023, 12:21: PM
ANSWERED BY EXPERTCBSE 10 - Physics
Asked by prassanna.j | 03 Sep, 2023, 12:11: PM
ANSWERED BY EXPERTCBSE 10 - Physics
Asked by prassanna.j | 28 Aug, 2023, 09:49: PM
ANSWERED BY EXPERTCBSE 10 - Physics
Asked by praveenkumae975 | 06 Feb, 2023, 07:19: PM
ANSWERED BY EXPERTCBSE 10 - Physics
Asked by ruparus | 04 Nov, 2022, 09:52: PM
ANSWERED BY EXPERT
