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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
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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.

संबंधित प्रश्‍न

Compute the heat generated while transferring 96000 coulomb of charge in one hour through a potential difference of 50 V.


The safety device based on the heating effect of electric current is called a ______.


Write Joule's law of heating.


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.


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


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.


An electric iron is connected to the mains power supply of 220 V. When the electric iron is adjusted at 'minimum heating' it consumes a power of 360 W but at 'maximum heating' it takes a power of 840 W. Calculate the current and resistance in each case. 


Identify the figure and give its use.


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


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


Find the odd one out and give its explanation.


What is the heating effect of electric current?


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


Name any two appliances which works on the phenomenon of heating effect of electric current.


Explain the importance/uses of fuse wire.


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


Name some devices that run using heat effect of electric current


Explain the heating effect of electric current.


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


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


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.


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.

What is Joule’s heating effect? How can it be demonstrated experimentally? List its four applications in daily life.


When a switch is in OFF position,

  1. circuit starting from the positive terminal of the cell stops at the switch.
  2. circuit is open.
  3. no current flows through it.
  4. current flows after some time. 

Choose the combination of correct answer from the following.


An MCB can be used instead of a fuse in an electrical circuit.


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.


______ wire is used in the filament of the bulbs.


What is a trip switch?


A fuse is used in an electric circuit to stop high currents flowing through the circuit.


1 kWh is equal to ______.


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?


What is the heating effect of electric current?


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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