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Ask QuestionPosted by Anjali Singh 7 years, 1 month ago
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Posted by Sukhwant Singh Thakur 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
An electric bell consists of an iron core, on which is wound a wire as a coil. One end of the coil is connected to one terminal of a battery, and the other end to a steel rod that acts like a spring for the hammer touching the screw contact. The other terminal of the battery is connected to the screw contact with a switch in the middle.
Working of an electric bell
Electric current flows through the coil when the switch is ON, and the iron core acts as an electromagnet. The iron core attracts the hammer towards it. The hammer hits the bell and produces a sound. The circuit breaks at the screw contact when the hammer moves towards the iron core. At this point, the iron core ceases to be an electromagnet. The hammer is pulled back to its original position due to the spring action of the steel rod, and then touches the contact again to complete the circuit. The circuit is completed and current flows through the coil again, and the hammer strikes the bell again. The process repeats itself and you hear a ringing sound since the hammer keeps hitting the bell, until the switch is released.
Posted by Pranav Sharma 5 years, 9 months ago
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Naval Kishore Kandpal 7 years, 1 month ago
Pranav Sharma 7 years, 1 month ago
Posted by Peehu Shrivastava 7 years, 1 month ago
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Devyansh Maurya 7 years, 1 month ago
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Thanos The Great - 7 years, 1 month ago
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Riddhima Agarwal 7 years, 1 month ago
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Dîby@Jït D@S 4&4 7 years, 1 month ago
Posted by Megha Rawat 7 years, 1 month ago
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Posted by Saurabh Yadav 7 years, 1 month ago
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Vijayalakshmi J 7 years, 1 month ago
The movement of the object from one place to another when a force is applied on the object.
Posted by Iftekhar Haider 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
- Take a cupful of water in a beaker and add a few drops of dilute sulphuric acid.
- Heat the water.
- When it starts boiling, add copper sulphate powder slowly while stirring continuously.
- Continue adding copper sulphate powder till no more powder can be dissolved.
- Filter the solution.
- Allow it to cool. Do not disturb the solution when it is cooling.
- Crystals of copper sulphate will be seen at the bottom of the beaker.
Posted by Adeek Lamakhane 7 years, 1 month ago
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Posted by Diksha Sidam 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
Alcohol thermometer can measure a temperature up to -140 degree c . Alcohol thermometer cannot measure high temperature because its boiling point is low .Alcohol thermometer has less hazardious
Posted by Ayush Gujjar 7 years, 1 month ago
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Posted by Nikita == 7 years, 1 month ago
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Posted by Anuradha Kumari 7 years, 1 month ago
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Posted by Namith Cherry 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
The ability to do work or cause change is called energy
Some sources of Energy : Electricity, Plants,Thermal (Heat),Fossil Fuels,Hydro Electric (Water),Nuclear Energy,Solar Energy,Wind Energy
Two Forms of Energy: Kinetic energy and Potential energy
Posted by Mohit Khandelwal 7 years, 1 month ago
- 2 answers
Vijayalakshmi J 7 years, 1 month ago
There are two types of vascular tissues in plants xylem and phloem. Phloem- carries glucose from the leaves to all parts of the plant body. This process is called translocation (movement of food from one place to another).
Suchitra Sen 7 years, 1 month ago
Posted by Srishti Tiwari 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
Corrosion: It is the process of degradation of material on continuous interaction with atmosphere. Because of Corrosion the strength of the material decreases.
Ex:
The materials like water pipes which are made up of metal continuously exposed to moist atmosphere will get corrode and over the time water starts leaking.
The bottom layer of the boats or ships get corrode, so for every fixed period of time they will get replaced by new materials.
Posted by Aryan A Shah 7 years, 1 month ago
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Meghna Thapar 5 years, 10 months ago
- Modern periodic law states that the properties of elements are a periodic function of their atomic numbers.
- The horizontal rows in the Modern Periodic Table are called periods.
- The vertical columns in the Modern Periodic Table are called groups.
Posted by Prarthana Lal 7 years, 1 month ago
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Ishan Gupta 7 years, 1 month ago
Posted by Syeda Roshni 7 years, 1 month ago
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Ishan Gupta 7 years, 1 month ago
Posted by Priyanshi Kothiyal 7 years, 1 month ago
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Posted by Surya Pratap Thakur 7 years, 1 month ago
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Dîby@Jït D@S 4&4 7 years, 1 month ago
Yogita Ingle 7 years, 1 month ago
Reproduction is the biological process by which organisms give birth or give rise to a new organism. This process is seen in all living organisms- both plants and animals.
Reproduction can be of two types:
- Asexual- Involves a single parent which gives rise to a new organism
- Sexual- Involves two parents of the opposite *** that give rise to a new organism.
Posted by Harsh Soni 7 years, 1 month ago
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Dhruv G 7 years, 1 month ago
Posted by Shweta Sharma 7 years, 1 month ago
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Posted by Angel Singh 7 years, 1 month ago
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Neha Mishra 7 years, 1 month ago
Posted by Vinay Kumar Awasthi 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
The biological process in which food is utilized to produce energy is called respiration. Respiration is necessary for survival of the living beings. A living being cannot survive even for a few seconds, without respiration. During respiration, it is mainly the carbohydrate which is oxidized to produce energy. This can be shown by following equation:
Carbohydrate + Oxygen → Carbon dioxide + Water + Energy
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Harsheethaa Perumal 7 years, 1 month ago
1Thank You