हिंदी

An electromagnet does not attract a piece of iron. - Science

Advertisements
Advertisements

प्रश्न

An electromagnet does not attract a piece of iron.

विकल्प

  • True

  • False

MCQ
सत्य या असत्य

उत्तर

This statement is False.

Explanation:

  • The working of an electromagnet is based on the magnetic effect of electric current.
  • When current passes through it, an electromagnet behaves as a magnet, attracting a piece of iron.
shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 14: Electric Current and Its Effects - Exercises [पृष्ठ १७१]

APPEARS IN

एनसीईआरटी Science [English] Class 7
अध्याय 14 Electric Current and Its Effects
Exercises | Q 9.3 | पृष्ठ १७१

संबंधित प्रश्न

Will the compass needle show deflection when the switch in the circuit shown by figure is closed?


Which way does the wire in the diagram below  tend to move? 

 


When the switch S is closed in the figure given below, the pointer of the galvanometer moves to the right.  

 

If S is kept closed, will the pointer:

(a) return to zero?
(b) stay over on the right?
(c) move to the left and stay there
(d) move to and fro until S is opened


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? 


How should the electric lamps in a building be connected so that the switching on or off in a room has no effect on other lamps in the same building?


Draw magnetic field lines produced around a straight current carrying conductor passing through a cardboard. How will the strength of the magnetic field change when the point where magnetic field is to be determined is moved away from the conductor?


A magnetic compass shows a deflection when placed near a current carrying wire. How will the deflection of the compass get affected if the current in the wire is increased? Support your answer with a reason.


Unscramble the following words:

HTRCO


A wire with green insulation is usually the live wire of an electric supply.


Make four electromagnets with 20, 40, 60 and 80 turns. Connect them one by one to a battery of 2 cells. Bring the electromagnet near a box of pins. Count the number of pins attracted by it. Compare the strengths of the electromagnets.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×