English
Maharashtra State BoardSSC (English Medium) 10th Standard

Identify the figure and give its use.

Advertisements
Advertisements

Questions

Identify the figure and give its use.

Identify a figure and write one use of it:

Classify
Short Answer
Advertisements

Solution

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.
shaalaa.com
  Is there an error in this question or solution?
Chapter 4: Effects of electric current - Exercise [Page 61]

RELATED QUESTIONS

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


Name any two effects of electric current.


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?


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


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


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


The current passing through an electric kettle has been doubled. The heat produced will become:

(a) half
(b) double
(c) four time
(d) one-fourth 


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


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?


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.


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.


Solve the following example.

Two tungsten bulbs of wattage 100 W and 60 W power work on 220 V potential difference. If they are connected in parallel, how much current will flow in the main conductor? 


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


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


What is a short circuit?


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


When does overloading occur?


True or False – If False give the correct answer

The fuse wire does not melts whenever there is overload in the wiring.


Explain the heating effect of electric current.


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


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:


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.


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?

 


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


An electric cell produces electricity from the ______ ______ in it.


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


What are the uses of electromagnets?


Copper wire offers very little ______ and does not get heated up quickly.


What is a trip switch?


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


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


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


In which of the following applications of Iron, rusting will occur most? Support your answer with valid reason.

A B C D

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?

The graph of voltage vs current for four different materials is shown below.

Which of these four materials would be used for making filament of bulb?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×