हिंदी

Why do we cover plug pin holes which are within the reach of children with cellotape or a plastic cover when not in use?

Advertisements
Advertisements

प्रश्न

Why do we cover plug pin holes which are within the reach of children with cellotape or a plastic cover when not in use?

लघु उत्तरीय
Advertisements

उत्तर

The child may put his/her fingers into the socket and he/she may get an electric shock which could be fatal. Plastic/cellotape is a bad conductor of electricity and hence chances of electric shock get reduced.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 14: Electric Current and Its Effects - SHORT ANSWER QUESTIONS [पृष्ठ ७८]

APPEARS IN

एनसीईआरटी एक्झांप्लर Science [English] Class 7
अध्याय 14 Electric Current and Its Effects
SHORT ANSWER QUESTIONS | Q 15. | पृष्ठ ७८

संबंधित प्रश्न

When the current is switched on through a wire, a compass needle kept nearby gets deflected from its north-south position. Explain.


Fill in the following blank with suitable words: 

 If a coil is viewed from one end, and the current flows in a clockwise direction, then this end is a ........... pole.


A coil is connected to a galvanometer. When the N-pole of magnet is pushed into the coil, the galvanometer deflected to the right. What deflection, if any, is observed when: 

the magnet is a rest in the coil? 


What is the function of a split ring in an electric motor?


(b) State whether the following statements are true or false:

(i) Magnetic poles exist in pairs.

(ii) Global warming is a desirable aspect of the intensified greenhouse effect.


Read the given passage and answer the following questions:

The home electrical connection consists of ‘live’, ‘neutral’ and ‘earth’ wires. The ‘live’ and the ‘neutral’ wires have potential difference of 220 V. The ‘earth’ is connected to ground. Due to a fault in the equipment or if the plastic coating on the ‘live’ and the ‘neutral’ wires gives a way the two wires come in contact with each other and a large current flows through it producing heat. If any inflammable material (such as wood, cloth, plastic, etc.) exists around that place it can catch fire. Therefore a fuse wire is used as a precautionary measure.

  1. Name the two wires having potential difference of 220 V.
  2. What is a short circuit?
  3. Write the function of a fuse.

What is that instrument which can detect the presence of electric current in a circuit?


Paheli does not have a night lamp in her room. She covered the bulb of her room with a towel at the night to get dim light. Has she taken the right step? Give one reason to justify your answer.


What are MCBs? How do they work?


Using an electromagnet, you can make a working model of a railway signal as shown in figure.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×