Q.1) Solve the following questions. (Any Five) 1) a) "Graphite is used to make carbon electrodes". Explain.
OR
b) Why are concave mirrors used in solar equlpment?
2) Write definition a) Work b)Potential difference c)Power.
3) Write the mirror formula.
4) Which type of bonds is present in saturated hydrocarbons? Which is the smallest hydrocarbon?
5) Which component of the electrical circuit this symbol denotes?
6) Identify the type of bulb connection in the figure
7) If the angle between two plane mirrors is 120", then calculate the number of Images formed.
8) Carbon compounds are found in which two forms?
Answers
Answer:
1)
a) Graphite is an extremely good conductor due to the presence of delocalized electrons in its structure. It is its conduction capabilities which are primarily utilized when graphite is used in making electrodes.
b) The concave mirror can absorb maximum sunlight which is incident on it to its focus which carries very powerful thermal energy. Later on, this heat energy is converted into electrical energy which can be used further. Hence, concave mirrors are used in solar devices.
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2)
a) work is the energy transferred to or from an object via the application of force along a displacement. In its simplest form, it is often represented as the product of force and displacement.
b) Potential difference is the difference in the amount of energy that charge carriers have between two points in a circuit.
c) Power is the energy that is produced by mechanical, electrical, or other means and used to operate a device.
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3) Mirror Formula :- 1/f= 1/u + 1/v
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4) covalent bonds and
Smallest Hydrocarbon = methane
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