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

What is the heating effect of electric current?

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प्रश्न

What is the heating effect of electric current?

एका वाक्यात उत्तर
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उत्तर

When a resistor is connected in an electrical circuit, heat is produced in it due to the current. This is known as the heating effect of current.

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 4: Effects of electric current - Answer in one sentence. [पृष्ठ १३]

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एससीईआरटी महाराष्ट्र Science and Technology Part 1 [English] Standard 10 Maharashtra State Board
पाठ 4 Effects of electric current
Answer in one sentence. | Q 1. | पृष्ठ १३

संबंधित प्रश्‍न

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


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?


What is nichrome? State its one use.


Why is a series arrangement not used for connecting domestic electrical appliances in a circuit?


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


Explain why, the current that makes the heater element very hot, only slightly warms the connecting wires leading to the heater.


A resistance of 25 Ω is connected to a 12 V battery. Calculate the heat energy in joules generated per minute.


What is meant by the heating effect of current?


Name the material which is used for making the filaments of an electric bulb.


An electric fuse works on the:
(a) chemical effect of current
(b) magnetic effect of current
(c) lighting effect of current
(d) heating effect of current


The elements of electrical heating devices are usually made of:

(a) tungsten
(b) bronze
(c) nichrome
(d) argon


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


Give a scientific reason.

Tungsten metal is used to make a solenoid type coil in an electric bulb.


Heat energy is being produced in a resistance in a circuit at the rate of 100 W. The current of 3 A is flowing in the circuit. What must be the value of the resistance?


Compute the heat generated while transferring 96000 coulombs of charge in two hours through a potential difference of 40 V.


These days when current in the circuit suddenly increases _______ switches are used.


Find the odd one out and give its explanation.


Which metal is used to make the filament of an electric bulb?


Define fuse.


Name some devices that run using heat effect of electric current


An electric iron draws a current of 4 A when connected to 220 V mains. Its resistance must be:


Assertion: Bending of wire decreases the resistance of the electric wire.

Reason: The resistance of a conductor depends on length, thickness, nature of material and temperature of the conductor.


An electric kettle consumes 1 kW of electric power when operated at 220 V. A fuse wire of what rating must be used for it?


Why is parallel arrangement used in domestic 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?

 


An electric fuse has a body made of ceramic and two points for connecting the fuse wire.


Explain the working of an electric fuse.


It would cost a man Rs. 3.50 to buy 1.0 kW h of electrical energy from the Main Electricity Board. His generator has a maximum power of 2.0 kW. The generator produces energy at this maximum power for 3 hours. Calculate how much it would cost to buy the same amount of energy from the Main Electricity Board.


Match the following

1. Bulb a. Conductor
2. Electroplating b.

Insulator

3. Pure water c.  Heating effect of current
4. Salt solution d. Chemical effect of current

An electrochemical cell converts ______ energy into ______ energy.


A trip switch is a ______ safety device.


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


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?


An electric kettle consumes 1 kW of electric power when operated at 220 V. A fuse wire of what rating must be used for it?


An electric kettle of 2 kW is used for 2h. Calculate the energy consumed in 

  1. kilowatt hour and
  2. joules.

An electric iron of resistance 20 Ω draws a current of 5 A. The heat developed in the iron in 30 seconds is ______.


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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