Class 6 Science Chapter 9 MCQ

A switch cannot be a source of electric current in the circuit. Electric cell is a source of electricity in the circuit. Other options are the functions of a switch.

In an electric bulb, it’s thin filament glows and gives off light and heat.

Filament of a torch bulb is a thin wire which gives off light. It is fixed to two thicker wires which provides support to it

Since, a steel spoon is a conductor of electricity therefore, current will pass through it. So, Paheli can use a steel spoon to complete the circuit.

Actually, insulators are non-conductors of electricity. Mica, rubber, plastics (like polythene, bakelite, PVC), ceramics, asbestos, glass, cotton, wax, thermocol etc., are the examples of insulators.

Here, all the statements are correct. Hence, your answer will be option [D].

We know that ordinary electric cells cannot be recharged. The electric cells and batteries used in cars, cameras and mobile phones etc., can be recharge again and again for many years. Rechargeable batteries have some special chemicals after using they can be restored energy again. It passes a suitable current in the opposite direction.

Here, all the statements are correct. Hence, your answer will be option [D].

When electricity or electric current from the cell passes through the filament of the bulb, the filament gets heated too much. The “heating effect produced by electricity” from the cell which makes a torch bulb work and produce light.

Those materials which allow electric current to pass through them are called conductors. All the metals are conductors of electricity. Silver metal is a best conductor of electricity. Copper, aluminium, brass metals are also good conductors. And also a non-metal called carbon (in the form of graphite) is also a conductor of electricity.

Rubber, plastic and ceramics are often used to protect us from the dangerous of electricity because they are good insulators. Electrician wear rubber gloves and hand gloves while handling naked electric wires because rubber is a good insulator and protects them for electric shocks.

Here, all the statements are correct. Hence, your answer will be option [D].

In an electric bulb, it’s thin “filament glows” and gives off light and heat which is made of tungsten. Tungsten, or wolfram (w), is a rare metal found naturally on Earth almost exclusively combined with other elements in chemical compounds rather than alone. It was identified as a new element in 1781 and first isolated as a metal in 1783.

Here, all the statements are correct. Hence, your answer will be option [D].

In an electric bulb, it’s thin filament glows and gives off “light and heat” which is made of tungsten. Tungsten, or wolfram (w), is a rare metal found naturally on earth.

If we make a circuit using cotton threads or jute strings then the bulb will not glow. This is because the cotton threads or jute strings are non-conductors of electricity i.e. insulators. So, cotton thread or jute string cannot conduct or carry electricity through them.

Electricity does not flow through an open circuit. Electricity always flow in a closed circuit.

There are some electrical appliances which need small amount of energy or electric (as battery or cell) to run. Such as torch, radio set, mobile phone, hair trimmer, calculator, wrist watch and so many. Television, refrigerator, washing machines, drilling machines, hair dryer, table fan, room heater, mixer and grinder etc. runs in domestic electricity which is 220 volts.

There is only energy which name is electrical energy or current which is converted into to mechanical energy, sound energy, heat energy and light energy very easily. As a example, when we turn on the switch of any machines (where electrical energy convert to mechanical energy), when we press the door bell (where electrical energy convert to sound energy), when we do switched “on” for electric bulb, it starts giving light and filament gets heated too (where electrical energy convert to heat energy and light energy).

Here, all the statements are correct. Hence, your answer will be option [D].

Here, all the statements are incorrect. Hence, your answer will be option [D].

Here, all the statements are correct. Hence, your answer will be option [D].

Here, all the statements are correct. Hence, your answer will be option [D].

Here, all the statements are correct for rechargeable batteries. Hence, your answer will be option [D].

Here, all the statements may be the as possible reasons. Hence, your answer will be option [D].