A wire of length 100cm and cross-sectional area of 2.0 x 10-3cm2 has a resistance…
A wire of length 100cm and cross-sectional area of 2.0 x 10-3cm2 has a resistance of 0.10 Ω.…
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The main function of the mouth of a telephone is to convert sound energy into
The main function of the mouth of a telephone is to convert sound energy into A. heat energy…
Which of the following is not a component of a d.c. electric motor?
Which of the following is not a component of a d.c. electric motor? A. Commutator B. Field magnets…
The diagram above represents a stationary wave set up in a string which is fixed…
The diagram above represents a stationary wave set up in a string which is fixed at both ends.…
CalcuIate the power delivered by a 3-phase line if its voltage and current at 132KV…
CalcuIate the power delivered by a 3-phase line if its voltage and current at 132KV and 60A respectively.…
The speed of sound in air is 330ms-1. How far from the centre of a…
The speed of sound in air is 330ms-1. How far from the centre of a storm is an…
The diagram above illustrates a variation of the displacement y of a wave particle with…
The diagram above illustrates a variation of the displacement y of a wave particle with time t. lf…
A sound wave of velocity 350 ms-1 is directed towards the surface of water. lf…
A sound wave of velocity 350 ms-1 is directed towards the surface of water. lf the ratio of…
The distance between two successive crests of a water is 1m. lf a particle on…
The distance between two successive crests of a water is 1m. lf a particle on the surface of…
The walls and ceilings of many standard auditoria are covered with perforated pads to
The walls and ceilings of many standard auditoria are covered with perforated pads to A. increase the intensity…