Electricity And Circuits

Electricity

Negative terminal and positive terminal.

True

Positive, negative

Tungsten.

True

Positive to negative.

Filament

Switch

2

The simple device that either breaks the circuit or completes it is called switch.

Torch and oven

Copper and aluminium

Air is insulator

Graphite

Materials that allow electric current to pass through them are called conductors.

Conductor, insulator.

The two terminals-negative and positive.

Materials that do not allow electric current to pass through them are called insulators.

Rubber

Rubber and plastic

Rubber

Insulators

Electrical, magnetic

False

Circuit

True

Conductor

Conductor

Yes. For example-iron, copper etc.

Insulators such as plastic, rubber etc.

True

Electric wires are made up of copper, aluminium.

Electric cell, wire and electric bulb.

No torch uses cardboard.

An electric cell is a device that supplies electrical energy to devices that function using electricity.

Secondary cell or accumulator is a type of electrical battery which can be charged, discharged into a load, and recharged many times.

Ans: c.

An electric cell consists of two terminals: a positive terminal and a negative terminal.

At the one end of the cell, there is a flat metallic disc with a minus sign just above it. This metallic disc is the negative terminal of the cell.

Electric cell has a cap, just under which there is a plus sign. This is the positive terminal of the cell.

Inside a cell, there is dark powdery stuff, which is the chemical that helps the cell to provide electricity to the device it is connected to. When a cell is connected to the device, the strength of the chemical decrease. Finally, when the entire energy of the chemical is spent, the device connected to the cell stops functioning.

When a cell is connected to a device, the strength of chemical is decrease. Finally, when the entire energy of the chemical is spent, the device connected to the cell stops functioning.

A rechargeable battery, storage battery, secondary cell, or accumulator is a type of electrical battery which can be charged, discharged into a load, and recharged many times.

A torch bulb consists of two terminals and a filament. The filament is a spirally wound wire inside the bulb supported by two thick wires at its ends. When the positive and the negative terminals of an electric cell are connected to the two terminals of a bulb, electricity passes through the filament and it starts glowing.

CFL (compact fluorescent lamp) is an energy-saving bulb, which has a longer life than an ordinary bulb.

When the filament of the bulb is proper, the electricity passes through the terminals of the bulb and bulb glows.

Non-rechargeable or primary battery is supplied fully charged, and discarded once discharged.

An electrolyte is a substance that produces an electrically conducting solution when dissolved in a polar solvent.

A dry cell is a type of battery, commonly used for portable electrical devices.

A solar cell or photovoltaic cell is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect.

Ans: c.

Ans: a.

The chemicals in the electric cell will get used up fast and cell will no longer produce an electric current. It will stop working.

Ans: c.

Ans: d.

When the positive and the negative terminals of an electric cell are connected to the two terminals of a bulb, the path is completed and the bulb glows.

A bulb is said to have fused when its filament breaks. When the filament is broken, there is a break in the flow of electricity through the terminals of the bulb. That is, the path required by electricity to flow is broken. Hence, the bulb does not glow.

An electric circuit is a path in which electrons from a voltage or current source flow.

Steel being conductor of electricity can be used in above case.

Ans: d.

Spoon being metal can conduct the electricity in the circuit.

The bulb would not glow in above case because one end of tester is made up of plastic which does not allow electric current to flow through it.

An electric circuit in which the normal path of current has been interrupted, either by the disconnection of one part of its conducting pathway from another, or by the intervention of an electric component, such as a transistor.

Ans: b.

Electricity generated from sunlight is called solar power.

Ans: c.

Ans: b.

Ans: d.

Ans: d.

ISI mark is a certification mark for industrial products in India. The mark certifies that a product conforms to the Indian Standard, mentioned as IS: xxxx on top of the mark, developed by the Bureau of Indian Standards (BIS), the national standards body of India.

A switch is an electrical component that can "make" or "break" an electrical circuit, interrupting the current or diverting it from one conductor to another.

A switch is an electrical component that can "make" or "break" an electrical circuit, interrupting the current or diverting it from one conductor to another.

Pushbutton switches are a simple switch mechanism for controlling some aspect of a machine or a process. Buttons are typically made out of hard material, usually plastic or metal.

A joystick is an input device consisting of a stick that pivots on a base and reports its angle or direction to the device it is controlling. A joystick, also known as the control column, is the principal control device in the cockpit of many civilian and military aircraft, either as a center stick or side-stick. It often has supplementary switches to control various aspects of the aircraft's flight. A popular variation of the joystick used on modern video game consoles is the analog stick.

A switch actuated by moving a small lever, usually an on/off switch with two positions.

A switch is an electrical component that can "make" or "break" an electrical circuit, interrupting the current or diverting it from one conductor to another.

A switch is an electrical component that can "make" or "break" an electrical circuit, interrupting the current or diverting it from one conductor to another.

Switch board is a board on which switches are put.

Ceiling fan switches controls them from distance.

Rubbers and plastic are used to cover electric wires and plug tops because they are insulators and do not allow electric current to pass when we touch plugs and switches.

Distilled water acts as an insulator as it is purest water. Whereas tap water has salts and impurities and acts as a conductor.

Because they are insulators and avoid direct contact with electric current while touching electric wires.

Copper being metal is good conductor of electricity.

Eraser is an insulator, cannot conduct electricity through it.

Iron nail being metal is conductor.

Uses of insulating handles reduce the chances to get electric shock.

Wood is an insulator so will not conduct electricity.

Ans: a.

Since circuit is complete, electricity flows and so bulb glows. It means material is good conductor of electricity.

Salt is a good conductor of electricity.

Ans: d.

Ans: d.

Sometimes we get electric shocks because our bodies are also good conductors of electricity.

Therootsare

To avoid getting shock, insulators are used.

Ans: a.

Kerosene oil have very low electrical conductivity.

Petrol, Diesel and kerosene oil have very low electrical conductivity and hence they are poor electrical conductors (i.e. insulators).

An insulator, also called a dielectric, is a material that resists the flow of electric charge. In insulating materials valence electrons are tightly bonded to their atoms.

Ans: b.