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ASSIGNMENT (UT - 1), Class-VII, ELECTRIC CURRENT & ITS EFFECTS, Q.1., , Name the device which helps in breaking or completing a circuit?, , Q.2., , Who observed the magnetic effect of current for the first time?, , Q.3., , What is the glowing part of a bulb called?, , Q.4., , When is the bulb is said to be fused?, , Q.5., , Draw a circuit diagram showing a bulb, a closed switch & a battery of four cells. Also show the, direction of current flowing through the circuit., , Q.6., , What do you understand by the 'heating effect of current'?, , Q.7., , On what factor does the amount of heat produced by the current depend upon?, , Q.8., , What is an electric fuse? Explain the working of an electric fuse., , Q.9., , What do you understand by magnetic effect of current?, , Q.10. What is an electromagnet? State the various uses of an electromagnet., Q.11. Give reason:, An electric bulb gives out light when connected in a circuit & switched on., Q.12. Manav made an electric circuit & placed a magnetic compass near it., (a) On switching on, the needle of the magnetic compass showed a deflection Why?, (b) On switching off, the needle came back to its normal north-south direction. Why?, Q.13. Explain the construction & working of an electric bell., , * * * * - - - - - -* * * * - - - - - -* * * *