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CBSE Class 10 Answered

What is resistance?
Asked by Sanyukta Khetan | 23 May, 2012, 06:25: PM
answered-by-expert Expert Answer
Resistance is the opposition that a substance offers to the flow of electric current.  It is represented by the uppercase letter R.  The standard unit of resistance is the ohm, sometimes written out as a word, and sometimes symbolized by the uppercase Greek letter omega.  When an electric current of one ampere passes through a component across which a potential difference (voltage) of one volt exists, then the resistance of that component is one ohm.
Answered by | 24 May, 2012, 10:33: AM

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CBSE 10 - Physics
the resistance of a wire of 0.01 cm radius is 10 ohm.if the resistivity of the material of the wire is 50*10^-8 ohm meter find the length of the wire
Asked by prassanna.j | 03 Sep, 2023, 12:28: PM
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CBSE 10 - Physics
Nichrome wire of length L and radius R has resistance 10 ohm.How would the resistance of the wire change when: only diameter of the wire is doubled?Justify 
Asked by prassanna.j | 03 Sep, 2023, 12:21: PM
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CBSE 10 - Physics
The resistance of a resistor is kept constant and the potential difference across its two ends is decreased to half of its former value.State the change that will occur in the current through it.
Asked by prassanna.j | 03 Sep, 2023, 12:13: PM
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CBSE 10 - Physics
A given length of a wire is doubled of itself and this process is repeated once again.By what factor does the resistance of the wire changes?
Asked by prassanna.j | 03 Sep, 2023, 12:11: PM
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CBSE 10 - Physics
 A 6 ohm resistance is doubled by folding,what is the new resistance?
Asked by prassanna.j | 28 Aug, 2023, 09:49: PM
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CBSE 10 - Physics
Pls answer fast... In a resistive circuit, if the current is increased to two times the percentage change in the amount of heat dissipated in the circuit would be a) 400% b) 300% c) 200% d) 100%
Asked by anubhutiupadhaya | 04 Mar, 2023, 03:16: PM
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CBSE 10 - Physics
Equivalent resistance 
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Asked by praveenkumae975 | 06 Feb, 2023, 07:19: PM
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CBSE 10 - Physics
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Asked by swetalinasamantaray022 | 20 Jan, 2023, 10:54: AM
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CBSE 10 - Physics
When a glass rod is rubbed with a piece of silk it acquires +10 micro coulomb of charge. How many electrons have been transferred from glass to silk?
Asked by rcgm729 | 02 Jan, 2023, 10:17: PM
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CBSE 10 - Physics
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