Advertisements
Advertisements
प्रश्न
Describe a simple Experiment to demonstrate that there Exists a magnetic field around a current-carrying conductor.
उत्तर
The conductor is kept in N-S direction and its ends are connected to a battery, rheostat and a tapping key. When the key is open i.e., no current flows in the conductor, the needle points in N-S direction. As the key is pressed and a current passes in the conductor, the needle deflects. This shows that a magnetic field Exists around a current carrying conductor.
APPEARS IN
संबंधित प्रश्न
Name and state the rule by which polarity at the ends of a current carrying solenoid is determined.
State two differences between an electromagnet and a permanent magnet.
Fill in the blanks by writing (i) Only soft iron, (ii) Only steel, (iii) Both soft-iron and steel for the material of core and/or magnet.
Electromagnet ______.
State two factors on which the magnitude of an induced e.m.f. in the secondary coils of a transformer depends.
State the purpose of the iron core.
What will be the effect on the working of an electric bell if instead of a direct current an alternating current is used?
State the energy change that takes’place in a D. C. motor.
State the factors, on which depends the magnitude of the force acting on current carrying conductor, when it is kept in a magnetic field perpendicular to it.
(i) A straight wire conductor passes vertically through a piece of cardboard sprinkled with iron filings. Copy the diagram and show the setting of iron filings when a current is passed through the wire in the upward direction and the cardboard is tapped gently. Draw arrows to represent the direction of the magnetic field lines.
(ii) Name the law which helped you to find the direction of the magnetic field lines.
Write the answer in your word.
How is an electromagnet made?
