Advertisements
Advertisements
प्रश्न
Name and state the rule by which polarity at the ends of a current carrying solenoid is determined.
Advertisements
उत्तर
The name of the rule is clock rule and it states. “If we look at the face of the loop and the direction of the current is anticlockwise, the direction of the magnetic field is north. If the direction of the current is clockwise, the direction of the magnetic field is south.”
APPEARS IN
संबंधित प्रश्न
Name the material used for making the armature of an electric bell. Give a reason for your answer.
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 the two properties of the magnetic lines of force around a circular coil.
A straight current-carrying conductor is kept in a magnetic field. It Experiences a force. State three factors on which the magnitude of force Experienced by the conductor depends. Under what condition will the conductor Experience no force?
How does a magnetic field set up by a solenoid change when number of turns are increased?
State the condition when an electric charge can give rise to a magnetic field.
State two advantages of an electromagnet over a bar magnet.
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 principle of a D. C. motor.
Which magnet will you use?
Iron is to be separated from trash.
