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A person buys two electrical devices P and Q for lightening purposes in his house. The device P consumes only 5 units of electricity in a month but device Q consumes 15 units of electricity in a month when used for the same number of hours daily. The device Q wastes a lot of electricity by radiating energy C but P does not do so.- What type of device is (i) P, and (ii) Q?
- Name one component which is present in Q but not in P.
- Name the energy C.
- Which device is more energy efficient: P or Q?
- Which fossil fuel is most likely to be conserved if all of us switch over to devices like P?
(a) (i) P is CFL (Compact Fluorescent Lamp) as it consumes fewer units of electricity, and (ii) Q is a filament type bulb as it consumes higher units of electricity.
(b) Filament is present in Q but not in P. It is present in filament type bulb, but not in CFL.
(c) Energy C is heat energy.
(d) P is more energy efficient as it produces more energy at fewer units of electricity.
(e) Coal is most likely to be conserved if all of us switch over to devices like P (CFL).
Updated on: 20-Mar-2023
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