What is the meaning of the statement “The potential difference between two points is
1V? Name the device used to measure potential difference. What is resistance of a
conductor ? What is electric power ? Write three formulae used to find it.
Answers
Answer:
potential difference is measured by voltmeter.
the resistance of a conductor is high that's why it gives shock.
hope it helps you
Answer:
(a) One volt is the potential difference between two points in a current-carrying conductor when 1 Joule of work is done to move a charge of 1 coulomb from one point to the other m i.e.,1 volt
<br> The potential difference is measured by the device called voltmeter. <br> (b) The connecting cord of an electric heater is usually made of copper which has a low resistivity and does not produce much heat as compared to the heating element. The resistivity of the heating element, on the other hand, is high and it produces large amount of heat which is retained by the element which thus gets very hot and emits light. <br> ( c) (i) Silver is a better conductor than copper. This is due to the reason that the resistivity of silver is less than that of copper. <br> (ii) Nichrome should be used for making electrical heating devices because (a) it has very high resistivity which produces high temperature when current flows through it and (b) it does not react with air when it is red hot