Answer:
(i) The potential
difference between two points is 1 volt means that if a charge of 1 coulomb is
moved from one point to the other, 1 joule of work is required.
The
potential difference across a conductor is measured by means of an instrument
called the "Voltmeter."
(ii)
The electric power P is given by
P=I2R
The
resistance of the heating element is very high. Large amount of heat generates
in the heating element and it glows hot.
The
resistance of connecting cord is very low. Thus, negligible heat generates in
the connecting cord and it does not glow.
(iii) (a) Silver is a better conductor due to its lower
resistivity.
(b)
Nichrome should be used in electrical heating devices due to very high
resistivity.
You need to login to perform this action.
You will be redirected in
3 sec