हिंदी
तमिलनाडु बोर्ड ऑफ सेकेंडरी एज्युकेशनएसएसएलसी (अंग्रेजी माध्यम) कक्षा ९

Name any two appliances which work under the principle of heating effect of current.

Advertisements
Advertisements

प्रश्न

Name any two appliances which work under the principle of heating effect of current.

टिप्पणी लिखिए
Advertisements

उत्तर

The principle of all electric heating appliances like iron box, water heater, toaster etc. work under the principle of heating effect of current.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 4: Electric charge and Electric current - Exercise [पृष्ठ ५०]

APPEARS IN

सामाचीर कलवी Science [English] Class 9 TN Board
अध्याय 4 Electric charge and Electric current
Exercise | Q VI. 6. | पृष्ठ ५०

संबंधित प्रश्न

An electric room heater draws a current of 2.4 A from the 120 V supply line. What current will this room heater draw when connected to 240 V supply line?


Identify the figure and give its use.


Write two devices based on the heating effect of electric current.


True or False – If False give the correct answer

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


B1, B2 and B3 are three identical bulbs connected as shown in Figure. When all the three bulbs glow, a current of 3A is recorded by the ammeter A.

  1.  What happens to the glow of the other two bulbs when the bulb B1 gets fused?
  2. What happens to the reading of A1, A2, A3 and A when the bulb B2 gets fused?
  3. How much power is dissipated in the circuit when all the three bulbs glow together?

 


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


Name two electric devices for each where

  1. heating effect of current is used and
  2. magnetic effect of current is used.

An electrochemical cell converts ______ energy into ______ energy.


Two students decided to investigate the effect of water and air on iron object under identical experimental conditions. They measured the mass of each object before placing it partially immersed in 10 ml of water. After a few days, the object were removed, dried and their masses were measured. The table shows their results.

Student Object Mass of Object
before Rusting in g
Mass of the coated
object in g
A Nail 3.0 3.15
B Thin plate 6.0 6.33

What might be the reason for the varied observations of the two students?


In a set up the students coated iron nails with zinc metal and noted that, iron nails coated with zinc prevents rusting. They also observed that zinc initially acts as a physical barrier, but an extra advantage of using zinc is that it continues to prevent rusting even if the layer of zinc is damaged. Name this process of rust prevention and give any two other methods to prevent rusting.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×