English

Why Does the Connecting Cord of an Electric Heater Not Glow Hot While the Heating Element Does?

Advertisements
Advertisements

Question

Why does the connecting cord of an electric heater not glow hot while the heating element does?

Advertisements

Solution

It is so because the connecting cord has a very low resistance. So, it does not get enough heat to glow.

shaalaa.com
  Is there an error in this question or solution?
Chapter 4: Electricity - Exercise 8 [Page 258]

APPEARS IN

Lakhmir Singh Physics Part 1 [English] Class 10
Chapter 4 Electricity
Exercise 8 | Q 9. | Page 258

Video TutorialsVIEW ALL [1]

RELATED QUESTIONS

An electric iron of resistance 20 Ω takes a current of 5 A. Calculate the heat developed in 30 s.


Why is the tungsten used almost exclusively for filament of electric lamps?


The safety device based on the heating effect of electric current is called a ______.


What is nichrome? State its one use.


Two exactly similar heating resistances are connected (i) in series, and (ii) in parallel, in two different circuits, one by one. If the same current is passed through both the combinations, is more heat obtained per minute when they are connected in series or when they are connected in parallel? Give reason for your answer.


Which electric heating device in your home do you think have resistors which control the flow of electricity?


Give Scientific reasons.

In the electric equipment producing heat e.g. iron, electric heater, boiler, toaster etc, an alloy such as Nichrome is used, not pure metals.


Solve the following example.

Two tungsten bulbs of wattage 100 W and 60 W power work on 220 V potential difference. If they are connected in parallel, how much current will flow in the main conductor? 


Name the factors on which the heat produced in a wire depends when current is passed in it, and state how does it depend on the factors stated by you.


Rewrite the following statement by selecting the correct option:

1 A = ____________ mA.


Find the odd one out and give its explanation.


What is the heating effect of electric current?


What is overloading?


Explain the application of heating effect of electric current in an electric bulb with a diagram.


True or False – If False give the correct answer

The fuse wire does not melts whenever there is overload in the wiring.


An electric bulb is connected to a 220 V generator. The current is 0.50 A. What is the power of the bulb?


Can we use the same fuse in a geyser and a television set? Explain.


What is a trip switch?


An electrochemical cell converts ______ energy into ______ energy.


Find the odd one out.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×