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महाराष्ट्र राज्य शिक्षण मंडळएस.एस.सी (इंग्रजी माध्यम) इयत्ता १० वी

Statement 1 : Electric Current ( Flow of Electrons ) Creates Heat in the Resistor.Statement 2 : Heat in the Resistor is Created According to the Rule of Energy Conservation. - Science and Technology 1

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प्रश्न

Statement 1 : Electric current ( flow of electrons ) creates heat in the resistor.
Statement 2 : Heat in the resistor is created according to the rule of energy conservation.
Explain Statement 1 with the help of Statement 2.

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उत्तर

i. When electrons flows through the resistor (during flowing electric current) electron possesses kinetic energy.
ii. During the flow of electron there is decrease in kinetic energy of electrons due to collision on atoms, ions and molecules. 
iii. According to the law of conservation of energy decrease in kinetic energy gets converted into heat.

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
2018-2019 (March) Balbharati Model Question Paper Set 1

संबंधित प्रश्‍न

How does the resistance of a wire vary with its area of cross-section?


What is nichrome? State its one use.


An electric kettle rated at 220 V, 2.2 kW, works for 3 hours. Find the energy consumed and the current drawn.


Write down the formula for the heat produced when a current I is passed through a resistor R for time t.


Derive the expression for the heat produced due to a current 'I' flowing for a time interval 't' through a resistor 'R' having a potential difference 'V' across its ends. With which name is this relation known?


 How much heat will an instrument of 12 W produce in one minute if it is connected to the heat produced by it?  


The current passing through a room heater has been halved. What will happen to the heat produced by it?


What is meant by the heating effect of current? Give two applications of the heating effect of current. 


Which of the following characteristic is not suitable for a fuse wire?

(a) thin and short
(b) thick and short
(c) low melting point
(d) higher resistance than rest of wiring


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


Statement 1 : Electric current ( flow of electrons ) creates heat in the resistor.
Statement 2 : Heat in the resistor is created according to the rule of energy conservation.
Explain Statement 1 with the help of Statement 2.


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


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.


Name any six domestic appliances based on the heating effect of electric current.


Answer the following question.
Write the mathematical expression for Joule's law of heating.


Which of the following substance contracts on heating?


What is used to turn off the sudden increase in current in the electrical circuit of the house nowadays?


How can overloading be avoided?


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


Define fuse.


A fuse wire repeatedly gets burnt when used with a good heater. It is advised to use a fuse wire of:


The heating element of an electric iron is made up of:


How does use of a fuse wire protect electrical appliances?


An electric component used as a safety device is electric circuit is ______.


What is an electric fuse made up of?


What are the factors affecting heating effect of electric current?


Fuse is a strip of alloy wire which is made up of lead and tin with a very low ______.


A student boils water in an electric kettle for 20 minutes. Using the same mains supply he wants to reduce the boiling time of water. To do so should he increase or decrease the length of the heating element? Justify your answer.


The following is not a safety device.


Explain why fuse wire is always connected in a series arrangement.


Find the odd one out.


In which of the following applications of Iron, rusting will occur most? Support your answer with valid reason.

A B C D

What is the heating effect of electric current?


State the law that explains the heating effect of current with respect to the measurable properties in an electrical circuit.


An electric iron is rated 220 V, 2 kW. If the iron is used for 3h daily find the cost of running it for one week if it costs ₹ 4.25 per kWh.


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