CBSE Class 10 Answered
Three identical bulbs are connected to a battery as shown.When the circuit is closed by means of the switch S, it is found that
a)P,Q and R all will be equally bright
b) P will be bright,but Q and R dim
explain why?
Asked by Amyra B | 21 Nov, 2013, 10:30: AM
Expert Answer
Option (b) is correct.
Explanation:
Let the resistance of the bulbs P, Q and R is R'.
Here all the three bulbs are indentical, therefore they would have same resistance R'.
when switch is connected, the current wiil flow from the circuit.
Assume that current flowing from the circuit is I.
This current I will split into I1 and I2.
I = I1 + I2
Current flowing from bulb P = I Voltage Vp = IR'
Current flowing from bulb Q = I1 Voltage VQ = I1R'
Current flowing from bulb R = I2 voltage VR = I2R'
It is obvious that I1 and I2 would be less than I. Hence the voltages across bulb Q and R would be low than that of bulb P.
Therefore, bulb P would be more bright than bulbs Q and R.
Answered by Komal Parmar | 21 Nov, 2013, 11:46: AM
Application Videos
-
Power rating
This video shows the calculation of electricity consumed, electric current ... -
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...
Concept Videos
-
Electricity
Define resistance and resistivity, factors on which they depends. Explain ... -
Electricity
Explain Joule's law of heating, heating effect of electric current, electr... -
Electricity
Explain a series and a parallel combination of resistors in a circuit. Det... -
Electricity
Define electric current, direction of current, ampere, potential differenc... -
Electricity
Define resistance and resistivity, factors on which they depends. Explain ...
CBSE 10 - Physics
Asked by khajannirwan | 27 Feb, 2024, 10:20: PM
ANSWERED BY EXPERT
CBSE 10 - Physics
Asked by saanviyadla | 24 Jan, 2024, 07:06: PM
ANSWERED BY EXPERTCBSE 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, 12:13: PM
ANSWERED BY EXPERTCBSE 10 - Physics
Asked by prassanna.j | 03 Sep, 2023, 12:11: PM
ANSWERED BY EXPERT
