please answers this question all answers I want to please class 7 subject Physics
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Answer:
Answer of 1 question- The path along which an electric current flows is called Circuit
Answer of 2 question- Current is the rate at which charge flows. Charge will not flow in a circuit unless there is an energy source capable of creating an electric potential difference and unless there is a closed conducting loop through which the charge can move. 2. Current has a direction.
Answer of 3 question- An alloy used in making heating elements for electric heating devices is nichrome. It is an alloy of nickel, chromium, ( and sometimes iron and other elements or substances).
Answer of 4 question- A fuse wire should have high resistance and LOW melting point. So that it prevents current higher than the prescribed value to pass . Low melting point will let it to break when high current passes through it because of the heat generated.
Answer of 5 question- Electricity can be used to produce a magnetic field. Magnetism produced by electricity is called electromagnetism. In 1820, OERSTED discovered by accident that electric current creates a magnetic field. ... Oersted also used a compass to find the direction of the magnetic field around a wire carrying current.
Answer of 6 question- US INVENTOR THOMAS EDISON is often credited with creating the solution in 1879: the carbon filament light bulb. Yet the British chemist Warren de La Rue had solved the scientific challenges nearly 40 years earlier.
Answer of 7 question- The combination of two or more cells is called a (BATTERY, AMMETER).
Answer of 8 question- Full form of MCB is the MINIATURE CIRCUIT BREAKER.
Answer of 9 question- A COMPACT FLUORESCENTT LAMP (CFL), also called compact fluorescent light, energy-saving light and compact fluorescent tube, is a fluorescent lamp designed to replace an incandescent light bulb; some types fit into light fixtures designed for incandescent bulbs.
Explanation:
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