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प्रश्न
Identify the given figure, write the labels of it.
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उत्तर
Current-carrying loop
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संबंधित प्रश्न
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.
The magnetic effect of current was discovered by:
(a) Maxwell
(b) Fleming
(c) Oersted
(d) Faraday
Name one device which works on the magnetic effect of current.
What device reverses the current?
Which way does the wire in the diagram below tend to move?
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 S-pole is inserted?
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?
(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.
Draw a neat labelled diagram to show the magnetic effect of electric current.
Explain the magnetic field created around a straight current carrying conductor with the help of a diagram.
A soft iron bar is introduced inside the current-carrying solenoid. The magnetic field inside the solenoid ____________.
What is that instrument which can detect the presence of electric current in a circuit?
In the arrangement shown in Figure there are two coils wound on a non-conducting cylindrical rod. Initially the key is not inserted. Then the key is inserted and later removed. Then
______ are also used to remove splinters of steel or iron in hospitals dealing with eye injuries.
An electric bell contains an ______, consisting of coils of insulated wire wound around
iron rods.
A wire with green insulation is usually the live wire of an electric supply.
The figure given below shows the magnetic field around the conductor. Study it and answer the questions:
- What changes are caused by increasing current?
- What do you see when the magnetic needle is kept a little away from the wire?
- In the second part of the figure, the iron filings arrange themselves in a circular manner around the wire. Why does this happen?
Using an electromagnet, you can make a working model of a railway signal as shown in figure.
