Science STD 7 ch 14 current and its effects solution

Science STD 7 ch 14 electric current and its effects




















An electric current is a flow of electrons through what electricity passes.......... by this chapter students can know about simple circuit they can be introduced to different electric instrument like wire, battery, bulb, switch etc.......... and they can know uses of different electric instruments.......




























there are two types of effects of current
1. thermal effects.
2. magnetic effects.
there are two types of circuit
1.open circuit
2.closed circuit.
there are thee types of objects
1. conductor
2. semi conductor
3. insulator










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