MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Heating Effect of Electric Current

Why nichrome ...

Question

Why nichrome wire is used for making heatng coils in electrical heaters?

A

Nichrome wire is 100 times less resisistive than copper

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

Nichrome wires do not oxidize quickly.

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

C

Nichrome wires are 100 times more resisistive than copper

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

D

Copper is not an affordable metal to be used in the heaters.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct options are
B
Nichrome wires do not oxidize quickly.

C
Nichrome wires are 100 times more resisistive than copper

Nichrome wire cannot be replaced in heaters as other metals will quickly oxidize and degrade at elevated emperatures. Nichrome being 100 times more resisistive than copper produces good amount of heat when current passes through it.

Suggest Corrections

thumbs-up

4

Similar questions

Q. Give Scientific reasons.
a. Tungsten metal is used to make a solenoid type coil in an electric bulb.
b. In the electric equipment producing heat e.g. iron, electric heater, boiler, toaster etc, an alloy such as Nichrome is used, not pure metals.
c. For electric power transmission, copper or aluminium wire is used.
d. In practice the unit kWh is used for the measurement of electrical energy, rather than joule.

Q. Explain the following:
(a) Why is tungsten used almost exclusively for filament of electric lamps?
(b) Why are copper and aluminium wires usually used for electricity transmission?
(c)Why is nichrome alloy used for making elements of electric irons?

Q. The heating element of an heating appliance such as electric room heater is made of nichrome alloy while the connecting wire is insulated copper wire.Why ?

Q. If the resistance of a certain copper wire is 1 Ω, then the resistance of a similar nichrome wire will be about:

(a) 25 Ω
(b) 30 Ω
(c) 60 Ω
(d) 45 Ω

Q. Nichrome and copper wires of same length and same radius are connected in series. Current I is passed through them.Which wire gets heated up more ? Justify your answer.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Heating Effect of Electric Current

PHYSICS

Watch in App

explore_more_icon

Explore more

Heating Effect of Electric Current

Standard X Physics

Join BYJU'S Learning Program

CrossIcon