Electric Current and its Effects - 2

We could not see element in electrical appliances. Give reason. What is the first statement of the audio clip?

• We could not see element in electrical appliances because electrical appliances
• such as immersion heaters, hotplates, irons, geysers, electric kettles, hair dryers
• have elements inside them.

We could not see element in electrical appliances. Give reason. What is the second statement of the audio clip?

• We could not see element in electrical appliances because electrical appliances
• such as immersion heaters, hotplates, irons, geysers, electric kettles, hair dryers
• have elements inside them.

We could not see element in electrical appliances. Give reason. What is the third statement of the audio clip?

• We could not see element in electrical appliances because electrical appliances
• such as immersion heaters, hotplates, irons, geysers, electric kettles, hair dryers
• have elements inside them.

Why a fused bulb does not glow? What is the first statement of the audio clip?

• A break in the filament of an electric bulb means a break in the path of the current between the terminals of the electric cell.
• Therefore, a fused bulb will not glow as current does not passes through its filament.

Why a fused bulb does not glow? What is the second statement of the audio clip?

• A break in the filament of an electric bulb means a break in the path of the current between the terminals of the electric cell.
• Therefore, a fused bulb will not glow as current does not passes through its filament.

There is usually a thick wire or a metal strip connecting the (a)   of one cell to the negative terminal of the next cell.

Why should we look for ISI mark on electrical appliances? What is the first statement of the audio clip?

• Before buying any electrical appliance we should look for ISI mark
• because this mark ensures that the appliance is safe
• and wastage of energy is the minimum

Why should we look for ISI mark on electrical appliances? What is the second statement of the audio clip?

• Before buying any electrical appliance we should look for ISI mark
• because this mark ensures that the appliance is safe
• and wastage of energy is the minimum

Why should we look for ISI mark on electrical appliances? What is the third statement of the audio clip?

• Before buying any electrical appliance we should look for ISI mark
• because this mark ensures that the appliance is safe
• and wastage of energy is the minimum

On what factors does the heat produced in a wire depend? What is the first statement of the audio clip?

• The amount of heat produced in a wire depends on its material, length and thickness.
• Thus, for different requirements, the wires of different materials and different lengths and thicknesses are used