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Power is a scalar quantity. The S.I. unit of Power is Watt (W). In other terms, we spent one Watt of Power while completing one Joule of Work in one second. 1 Watt = 1 Joule / 1 second. Other units of Power are Kilowatt (kW), Megawatt (MW) and Gigawatt (GW). The relation between units of Power: 1 kW = 1000W, 1 MW = 1000000W and 1GW = 1000000000W.
Moreover, the standard unit of measuring power is Watt. According to the power formula, a unit of power is equal to a unit of work divided by a unit of time. Also, a watt is equal to Joule/ second. Besides, due to historical reasons, power is occasionally used to describe the power delivered by a machine. In addition, one horsepower equals 750 ...
If the unit of power is 1 kilo watt, the displacement is 100 m and time 1 s, then the unit of mass will be? View Solution. Q 3. The half-life of radium is 1620 yr and the atomic weight is 226 kg per kilo mol. The number of atoms that will decay from its 1g sample per second will be (Take Avogadro's number N A =6.023×1023 atom/kilo mol).
Hence Force applied by engine is F = 125 × 5.56 = 695 N. By applying the power formula, P = F v, the peak power of the engine is P = 695 × 27.78 = 19,307 W. For the Racing Motorcycle. Since, the engine is the same, its peak power will remain constant. Therefore P = 19,307W. At peak power, the speed of racing motorcycle is same, or v = 27.78 m/s.
Unit of energy or work done is Joule (J) and time is Second. So unit of Power will be j o u l e S e c It is given as : SI unit of power is Watt denoted by W.
The SI unit of power is the watt, one joule per second. It is the rate of doing work, measured in watts, and represented by the letter P. The electric power in watts produced by an electric current I consisting of a charge of Q coulombs every t seconds passing through an electric potential (voltage) difference of V is.
SI Unit – Mole. SI Unit Symbol – mol. Luminous intensity (J) SI Unit – Candela. SI Unit Symbol – cd. List of SI Derived Units. Force, Weight. SI Unit – Newton. SI Unit Symbol – N. Furthermore, expressed in SI Base Unit – kg⋅m⋅s-2. Also, expressed in other SI units – – Frequency SI Unit – Hertz. SI Unit Symbol – Hz
None of these. Practical unit of power is horse power (hp). 1 hp =746W , where W is Watt (the SI unit of power). Was this answer helpful?
Given Power=1 kilowatt=1000 watt, length= 100 m and time =1 s. We know power = Work done Time = Force × displacement Time Force = 10 N. Also we know Force= mass × acceleration.
Write its SI unit. Solution. Verified by Toppr. Power is defined as the rate of doing work. It is the ratio of the work done ( W) and the time taken ( t).
