Advertisements
Advertisements
प्रश्न
Do you think an electromagnet can be used for separating plastic bags from a garbage heap? Explain.
Advertisements
उत्तर
No. Electromagnets can only attract magnetic materials. A plastic bag is a non-magnetic material and will not be attracted by an electromagnet. Hence, an electromagnet cannot be used to separate plastic bags from a garbage heap.
APPEARS IN
संबंधित प्रश्न
Will the compass needle show deflection when the switch in the circuit shown by figure is closed?
An electric bell has an electromagnet.
Which effect of current can be utilised in detecting a current carrying wire concealed in a wall?
The magnetic effect of current was discovered by:
(a) Maxwell
(b) Fleming
(c) Oersted
(d) Faraday
The direction of current flowing in the coil of an electromagnet at its two ends X and Y are as shown below:
What is the polarity of end X?
What is the polarity of end Y?
Name and state the rule which you have used to determine the polarities.
(ii) Global warming is a desirable aspect of the intensified greenhouse effect.
Explain the magnetic field created around a straight current carrying conductor with the help of a diagram.
What is that instrument which can detect the presence of electric current in a circuit?
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.
Define the magnetic effect of electric current.
