मराठी

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

Advertisements
Advertisements

प्रश्न

An electromagnet does not attract a piece of iron.

पर्याय

  • True

  • False

MCQ
चूक किंवा बरोबर
Advertisements

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
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 10: Electric Current and Its Effects - Exercises [पृष्ठ १२०]

APPEARS IN

एनसीईआरटी Science [English] Class 7
पाठ 10 Electric Current and Its Effects
Exercises | Q 9. (c) | पृष्ठ १२०

संबंधित प्रश्‍न

Fill in the following blank with suitable words:

 If a coil is viewed from one end and the current flows in an anticlockwise 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 N-pole is removed?




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? 


A uniform magnetic field exists in the plane of paper pointing from left to right as shown in Figure. In the field an electron and a proton move as shown. The electron and the proton experience


Magnetic effect of current was discovered by ______.


Boojho made an electromagnet by winding 50 turns of wire over an iron screw. Paheli also made an electromagnet by winding 100 turns over a similar iron screw. Which electromagnet will attract more pins? Give reason.


______ are also used to remove splinters of steel or iron in hospitals dealing with eye injuries.


Edison used a ______ wire coil is a vacuum glass and discovered the first electric bulb in 1879.


As shown in the diagram an aluminium rod 'AB' is suspended horizontally between the two poles of a strong horse shoe magnet in such a way that the axis of rod is horizontal and the direction of the magnetic field is vertically upward. The rod is connected in series with a battery and a key.

State giving reason:

  1. What is observed when a current is passed through the aluminium rod from end B to end A?
  2. What change is observed in a situation in which the axis of the rod 'AB' is moved and aligned parallel to the magnetic field and current is passed in the rod in the same direction?

A rectangular loop ABCD carrying a current I is situated near a straight conductor XY, such that the conductor is parallel to the side AB of the loop and is in the plane of the loop. If a steady current I is established in the conductor as shown, the conductor XY will ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×