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

Identify the figure and give its use.

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प्रश्न

Identify the figure and give its use.

Identify a figure and write one use of it:

वर्गीकरण करा
लघु उत्तर
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उत्तर

Figure: Cartridge type fuse/Electric fuse

Uses: 

  1. It is a safety device that protects the wiring from overheating caused by an excessive current supply.
  2. It melts when a high current travels through the circuit, causing the circuit to break and the current to stop flowing through it.
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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 4: Effects of electric current - Exercises [पृष्ठ ६१]

संबंधित प्रश्‍न

Why are the conductors of electric heating devices, such as bread-toasters and electric irons, made of an alloy rather than a pure metal?


What is nichrome? State its one use.


Why are the coils of electric irons and electric toasters made of an alloy rather than a pure metal?


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


An electric iron of resistance 20 ohms draws a current of 5 amperes. Calculate the heat produced in 30 seconds.


Explain why, tungsten is used for making the filaments of electric bulbs.


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?


If the current flowing through a fixed resistor is halved, the heat produced in it will become:


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.


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).


Why does tungsten metal used to make solenoid type coil in an electric bulb?


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


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


What is overloading?


Live wire and neutral wires have a 220 V potential difference.


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


Heating effect of current is called ______


Which of the following is correct?


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


A current of 1 A is drawn by a filament of an electric bulb. Number of electrons passing through a cross-section of the filament in 16 seconds would be roughly:


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


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


How does use of a fuse wire protect electrical appliances?


Why is parallel arrangement used in domestic wiring?


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


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.


Unscramble the following words:

SFEU


Your teacher has shown you the following activity.


Activity: Teacher has wound a long insulated piece of wire around an iron nail in the form of a coil. Free ends of the wire are connected to a cell through a switch as shown in the following figure. The current is switched on and some pins are placed near the ends of the nail.

Write down any three questions that come to your mind about this activity.


What are the factors affecting heating effect of electric current?


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.


A trip switch is a ______ safety device.


Find the odd one out.


Anannya responded to the question: Why do electrical appliances with metallic bodies are connected to the mains through a three-pin plug, whereas an electric bulb can be connected with a two-pin plug?

She wrote: Three-pin connections reduce heating of connecting wires.

  1. Is her answer correct or incorrect? Justify.
  2. What is the function of a fuse in a domestic 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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