Class 6 Science Chapter 9 MCQ

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

A single electric cell usually provides only 1.5 volt of electricity whereas the electricity from power stations which is used in our homes is at 220 volts. It will get fused if it is connected to the path of 220 electric volts because a torch bulb will normally work on 4.5-volt electricity.

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.

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.

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.

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

A non-metal called carbon in the form of graphite is also a conductor of electricity. Rest of all are insulators.

When all the chemicals are in electric cells are used up, the electric cell stops producing 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.

when electricity or electric current from the cell passes through the filament of the bulb, the filament gets heated too much.

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.

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.

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.

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

The positive terminal of one cell is always kept in contact with the negative terminal of the different cell.

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 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].

The electric cell is a cylindrical device having a small metal cap on one side and a metal disc on the other side. The electric cell has two terminals: a positive terminal and a negative terminal. The metal cap is positive terminal of the electric cell whereas metal disc is the negative terminal of the electric cell.