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प्रश्न
You have three resistors of values 2Ω, 3Ω and 5Ω. How will you join them so that the total resistance is more than 7Ω?
1) Draw a diagram for the arrangement
2) Calculate the equivalent resistance.
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उत्तर
To get total resistance more than 7Ω. We can connect 2Ω,3Ω and 5Ω in series.
1)
2)
`R_"equivalent"` = 2 + 3 + 5 = 10Ω
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संबंधित प्रश्न
The other name of potential difference is:
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What is Ohm's law? Explain how it is used to define the unit of resistance.
For the circuit shown in the diagram below:
What is the value of:
(i) current through 6 Ω resistor?
(ii) potential difference across 12 Ω resistor?
Explain the statement ‘the potential difference between two points is 1 volt’.
What would you suggest to a student if while performing an experiment he finds that the pointer/needle of the ammeter and voltmeter do not coincide with the zero marks on the scales when the circuit is open? No extra ammeter/voltmeter is available in the laboratory.
Conceptual question.
Does a solar cell always maintain the potential across its terminals constant? Discuss
A cylindrical conductor of length l and uniform area of cross section A has resistance R. Another conductor of length 2l and resistance R of the same material has area of cross section.
Name a device that helps to maintain a potential difference across conductors.
