ELECTRIC BELL

BELL : AFKM : : DOOR : ?

Consider the following statements about an electric bell: I. An electric bell works on the principle of magnetic effect of current II. An electric bell consists of an electromagnet III. An electric bell produces sound continuously Among the given statements,

Classify the following into the heating effect of electric current and the magnetic effect of electric current: Fuse wire, ammeter, electric iron, microphone, electric bulb, electric bell, galvanometer, electric cooker, loud speaker, geyser, electric generator, electric motor, telephone receiver, radio, stereo speaker.

Following are down the steps of an experiment to prove that medium is required for the propagation of sound waves. Arrange these steps in propagation of sound waves. Arrange these steps in proper sequence (a) Consider a glass jar with an outlet connected to a vacuum pump and a closed lid (b) Suspend an electric bell. (c) Evacuate the jar by using a vaccum pump (d) Switch on the electric bell (e) Observe that the intensity of the sound is less when the jar is evacuated (f) This proves that medium is required for the propagation of sound

Write the following steps in a sequential order involved in the working of an electric bell. (A) the armature is pulled towards the electromagnet (B) The soft iron behave as an electromegnet. (c) The circuit breaks and the electromagnet loses the magnetic property. (D) The hammer hits the gong. (E) Armature goes back and the circuit gets closed. (F) The process is repeated and the bell rings continuously (G) The circuit is closed

Atul has constructed four electric circuits, each consisting of a bell, a bulb, switch and a cell. The bells of the circuits are labelled as 1, 2, 3 and 4, as shown in the given figure. Which bell will produce a sound when the switch is closed?

Julie hears the ringing of a bell at a nearby church. She hears the bell ring 24 times in one minute. The ringing frequency of the bell is