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प्रश्न
What will be the effect on the working of an electric bell if instead of a direct current an alternating current is used?
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उत्तर
If electric bell is connected to a.c. instead of d.c. then bell will ring intermittently.
संबंधित प्रश्न
Name and state the rule by which polarity at the ends of a current carrying solenoid is determined.
Name the material used for making the armature of an electric bell. Give a reason for your answer.
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.
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.
How does a magnetic field set up by a solenoid change when a soft iron core is inserted inside solenoid?
Why is soft iron generally used as the core of the electromagnet?
Point out three differences between an electromagnet and a bar (or permanent) magnet.
State the function of a split ring in D.C. motor.
How does a magnetic field set up by a solenoid change when cross-sectional area of solenoid is increased?
