CBSE Class 10 Answered
The resistivity of nichrome and other copper are conneted in series and a current (I) is passed through them. State the change observed in the temperature of the 2 wires. Justify your answer. State the law which explains the above observations.
Asked by guptaabhinav0809 | 23 Nov, 2018, 10:48: PM
Expert Answer
Let us assume both nichrome wire and copper wire are of same length.
Resistivity of nichrome = 1.1×10-6 Ωm , Resistivity of copper = 1.72×10-8 Ωm
hence resistance value of nichrome wire is greater than resistance value of copper.
since both the wire is connected in series, same current will pass through it.
Power dissipation is i2R , where i is the current and R is the resistance.
Since power dissipation is proportional to resistance, nichrome wire temperature increases much more than copper wire.
The law that explains the above effect is ohms law and the basic equation of electrical power
Power = current×voltage = current×current×resistance
Answered by Thiyagarajan K | 24 Nov, 2018, 10:31: AM
CBSE 10 - Science
Asked by sony.lucky455 | 02 Apr, 2024, 03:23: PM
ANSWERED BY EXPERT
CBSE 10 - Science
Asked by sagarmishra | 18 Mar, 2024, 04:10: PM
ANSWERED BY EXPERTCBSE 10 - Science
Asked by srinivasansriharinia9 | 01 Mar, 2024, 08:17: PM
ANSWERED BY EXPERTCBSE 10 - Science
Asked by muskanprayagraj78 | 26 Feb, 2024, 05:44: PM
ANSWERED BY EXPERTCBSE 10 - Science
Asked by kmannatpreet4 | 21 Feb, 2024, 07:34: PM
ANSWERED BY EXPERTCBSE 10 - Science
Asked by umaambiger87 | 08 Feb, 2024, 03:28: PM
ANSWERED BY EXPERTCBSE 10 - Science
Asked by pvasanth3573 | 07 Feb, 2024, 10:13: PM
ANSWERED BY EXPERTCBSE 10 - Science
Asked by samirankarmakar2702 | 07 Feb, 2024, 09:59: PM
ANSWERED BY EXPERT
