why / give reasons for the following
a) heat is produced in a resistor
b) tungsten is used in electric bulbs
c)nichrome is used in electric ovens
d) parallel connection is better then series
e) ammeter is connected in series
f) voltmeter is connected in series
g) why copper wire is used in connecting wires
h) connecting rod in heater does not glow but heating elements does
i) alloys are used in heating devices
Answers
Answer:
a-When a current flows through a resistor, electrical energy is converted into HEAT energy that's why heat is produced
b - tungsten has very high melting point
c- nichrome has low resistivity and high melting point, this makes nichrome an ideal material for making high temperature wires. Nichrome is commonly wound up into coils and used in heating elements (devices that convert heat into electricity through Joule heating)
d - Two bulbs in a simple parallel circuit each enjoy the full voltage of the battery. This is why the bulbs in the parallel circuit will be brighter than those in the series circuit. Another advantage to the parallel circuit is that if one loop is disconnected, then the other remains powered.but in series the whole circuit is ruptured
remaining are easy do it by your own you will find it in your respective book easily