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

The ‘live’ and the ‘neutral’ wires have potential difference of _______.

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प्रश्न

The ‘live’ and the ‘neutral’ wires have potential difference of _______.

पर्याय

  • 110 V

  • 202 V

  • 201 V

  • 220 V

MCQ
रिकाम्या जागा भरा
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उत्तर

The ‘live’ and the ‘neutral’ wires have potential difference of 220 V.

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 4: Effects of electric current - Choose the correct option. [पृष्ठ ४]

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एससीईआरटी महाराष्ट्र Science and Technology Part 1 [English] Standard 10 Maharashtra State Board
पाठ 4 Effects of electric current
Choose the correct option. | Q 2. | पृष्ठ ४

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?


Give two reasons why nichrome alloy is used for making the heating elements of electrical appliances.


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?


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


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


How does the wire in the filament of a light bulb behave differently to the other wires in the circuit when the current flows?

What property of the filament wire accounts for this difference?


Three heaters each rated 250 W, 100 V are connected in parallel to a 100 V supply. Calculate:

  1. the total current taken from the supply
  2. the resistance of each heater and
  3. the energy supplied in kWh to the three heaters in 5 hours.

Give a scientific reason.

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


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.


When does overloading occur?


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


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


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


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


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?


Three incandescent bulbs of 100 W each are connected in series in an electric circuit. In another circuit another set of three bulbs of the same wattage are connected in parallel to the same source.

  1. Will the bulb in the two circuits glow with the same brightness? Justify your answer.
  2. Now let one bulb in both the circuits get fused. Will the rest of the bulbs continue to glow in each circuit? Give reason.

Unscramble the following words:

SFEU


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


Paheli took a wire of length 10 cm. Boojho took a wire of 5 cm of the same material and thickness. Both of them connected the wires as shown in the circuit given in the following figure. The current flowing in both the circuits is the same.

  1. Will the heat produced in both cases be equal? Explain.
  2. Will the heat produced be the same if the wires taken by them are of equal lengths but of different thickness? Explain.


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.


Name the effect of the current responsible for the glow of the bulb in an electrical circuit.


What is a trip switch?


An electric fuse is a wire made up of a material having ______ melting point.


An electrochemical cell converts ______ energy into ______ energy.


The electric fuse works on the Joule heating principle.


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


Tara, after completing her exams, went to her grandmother's house along with her younger brother Rahul. One day, Rahul came home after playing and switched on the fan and air conditioner. At the same time, his grandmother was preparing a milkshake for him using a mixer. Suddenly, they heard a big sound and the electricity of the house got shut down. Tara is called an electrician. He said the main reason for supply to shut down was overloading.

  1. What is overloading?
  2. Is overloading and short the same? When does short-circuiting take place?
  3. How can the effects of overloading be avoided?

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

  1. kilowatt hour and
  2. joules.

Write an expression for the amount of heat produced in a resistor when an electric current is passed through it stating the meanings of the symbols used.


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


When a current I flows through a wire of resistance R for time t then the electrical energy produced is given by ______.


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