Electricity and Circuits (HBBVS)

This is the correct answer. Dry cell is safe and portable source of electricity with each cell of 1.5 V.

This is the correct answer. When electric current is passed through tungsten wire, it gets heated and produces light.

This is the correct answer. If four cells are joined in series, they will produce 6 V. Each cell is 1.5 V, so 4 * 1.5 = 6 V.

This is the correct answer. Electrical energy can be changed into mechanical (moving a machine part), sound (loudspeaker) and magnetic energy (electromagnet).

This is the correct answer. Power stations provide 220 V to homes.

This is the correct answer. If the two terminals of the battery are connected by a wire, the chemicals stored in it will be used up fastly, and cell will damage quickly.

This is the correct answer. Metal tip is the positive terminal and metal case is the negative terminal.

This is the correct answer. Electric energy is converted into both, heat and light energy, in an electric bulb.

This is the correct answer. Carbon is the only non-metal, which is a good conductor of electricity, e.g. lead of a pencil.

This is the correct answer. Sliding switch acts as a switch in circuit, which can open and close a circuit.

This is the correct answer. Correct options are (a) Electricity flows in a closed circuit and (c) Electricity flows when the switch is closed.

This is the correct answer. When a high voltage electricity is given across the bulb, its wire melts due to high voltage and the bulb fuses.

This is the correct answer. Plug case is an insulator, so it is safe to to touch it. Electric plug is a conductor, used for carrying current.

This is the correct answer. Circuit is broken when it is made up of cotton threads, as cotton is a bad conductor of electricity. Current cannot flow from negative to positive, so the circuit is broken.

This is the correct answer. Mica sheet is an insulator, which does not conduct electricity, so the bulb does not glow.