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

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

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प्रश्न

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

एका वाक्यात उत्तर
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उत्तर

Nowadays, Miniature Circuit Breakers (MCB) is used to turn off the sudden increase in current in the electrical circuit of the house.

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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 6. | पृष्ठ १३

संबंधित प्रश्‍न

An electric heater of resistance 8 Ω draws 15 A from the service mains 2 hours. Calculate the rate at which heat is developed in the heater.


An electric heater is connected to the 230 V mains supply. A current of 8 A flows through the heater. 

(b) How much energy is transferred to the heater each second?


How does the resistance of a wire vary with its: 

 diameter? 

 


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


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


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


Give Scientific reasons.

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


Give Scientific reason.

In practice, the unit kWh is used for the measurement of electrical energy, rather than joule.


Identify the figure and give its use.


An electric iron of 1100 W is operated for 2 hrs daily. What will be the electrical consumption expenses for that in the month of April? (The electric company charges Rs 5 per unit of energy).


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.


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


Rewrite the following statement by selecting the correct option:

1 A = ____________ mA.


Answer the following question:
what is the heating effect of the electric current? state any four applications of it?


In an electric bulb, coil of _______ metal is used.


The electricity bill specifies the usage in _______.


A coil of an alloy _______ is used in electric heater cooker as a resistor.


Which of the following substance contracts on heating?


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.


When does overloading occur?


Name some devices that run using heat effect of electric current


Heating effect of current is called ______


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


Mark the correct choice

  1. Assertion: Electric appliances with a metallic body have three wire connections.
  2. Reason: Three-pin connections reduce the heating of the connecting wires.

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.


How does use of a fuse wire protect electrical appliances?


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


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.


Assertion: A current-carrying wire should be charged.
Reason: The current in a wire is due to the flow of free electrons in a definite direction.


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


In a set up the students coated iron nails with zinc metal and noted that, iron nails coated with zinc prevents rusting. They also observed that zinc initially acts as a physical barrier, but an extra advantage of using zinc is that it continues to prevent rusting even if the layer of zinc is damaged. Name this process of rust prevention and give any two other methods to prevent rusting.


What is the heating effect of electric current?


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