Advertisements
Advertisements
प्रश्न
How does a magnetic field set up by a solenoid change when number of turns are increased?
उत्तर
By having more number of turns, the intensity of magnetic field increases.
APPEARS IN
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.
Answer the following in short.
Name a few common appliances that use electromagnets.
How does a magnetic field set up by a solenoid change when strength of current in the solenoid is decreased?
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 factors that can increase the speed of rotation of the coil in a D.C. motor.
The primary windings of a step-up transformer are usually made of thicker wire than the secondary. Explain.
State and explain Maxwell’s Cork Screw Rule.
Write the answer in your word.
How is an electromagnet made?