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प्रश्न
How does a magnetic field set up by a solenoid change when strength of current in the solenoid is decreased?
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उत्तर
By decreasing the current flowing in the solenoid, the intensity of magnetic field decreases.
संबंधित प्रश्न
Name and state the rule by which polarity at the ends of a current carrying solenoid is determined.
State three uses of an electromagnet?
Name the material of core in (a) an electric bell, (b) electromagnet, (c) a d.c. motor, (d) an a.c. generator and (e) a transformer.
Name the type of transformer shown in fig . What changes will you observe regarding the brightness of the lamp, if
(a) The no. of turns in the secondary is doubled?
(b) The part X of the transformer is removed?
( c) The core of the transformer is made out of copper?
(d ) The A.C. supply is replaced by D.C.?
State the purpose of the iron core.
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 important properties (or characteristics) of magnetic lines of force around a straight conductor.
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.
State and explain Maxwell’s Cork Screw Rule.
