(Take g = 10m/sWork needs to be done in lifting an object to a height = potential energy at that heightA motor with a power of 4W is used continuously to move an object of mass 2Kg for 16s. How much Power needs to be used to lift a mass of 5Kg to a height of 8m in 10s. Vedantu academic counsellor will be calling you shortly for your Online Counselling session. where 'a' is area of cross section, 'd' is the density of water and 'v' is the velocity of flow of water.Therefore, Power of water is directly proportional to the cube of velocity of water so let : The kinetic energy of rushing out water from a dam is used in rotating a turbine.

In fact, we still need to know how much power an electronic device can handle. , Instead of the usual power equation, as we are given the velocity of the object. In this case, the entire power of the battery is dissipated inside the battery due to its internal resistance. Power formula connects the charge, voltage and time. We merely need to calculate the force exerted on the object by the air resistance, and the angle between the force and the velocity of the object. Learn its definition, formula, unit along with solved examples at BYJU'S. P out = E / t = 2970J / 60s = 49.5W. is defined as the ratio of output power ( the power across the external resistance of the circuit, to the input power (i.e. So, if is the internal resistance of the source of current (i.e. You can easily find electric power in watts by using the following power formulas in electric circuits. The motor was activated for 60 seconds and produced work of 2970 joules. If resistances (i.e. Then P α 1/R and I α 1/R (as V = IR), which means in parallel combination of resistances, the current and  power consumed will be more in smaller resistance. Before moving on make sure to read what is dc circuit first.

Back to basic, below are the simple Power formulas for Single Phase AC Circuit, Three Phase AC Circuits and DC Circuits. It is because to allocate plus sign to reactive power consumption to inductors/coils/induction motors etc. electrical appliances) are connected in series, the current through each resistance is same.

Find the efficiency of the motor. in maintaining the current in the electric circuit. Electric power is usually sold by electric companies as the kilowatt hour (3.6 MJ) which is the product of power in kilowatts multiplied by running time in hours. The practical unit of power is kilowatt and horse power; where 1 kilowatt = 100 watt and 1 H.P = 746 watt. PREMIUM So the power dissipated inside the battery is given as: The efficiency of a source of emf.

Find the velocity with which the object will move after 16s. The exact value of the terminal velocity varies according to the shape of the object, but can be estimated for many objects at 100 m/s. Power Formulas in DC, AC Single Phase and AC Three Phase Circuits. How much water  in kg/minute can it raise a height of 20m? like never before What is the average power the elevator exerts during this trip? The pipe through which water is rushing is 2.4 meters and its speed is 12 m/sec. Assuming that whole of kinetic energy of the water is used in rotating the turbine, calculate the current produced if efficiency of the dynamo is 60% and the station transmits power at240 kV. Power is denoted as P and the SI unit is watt. Electrical formulae for current, voltage, resistance, power and conductivity.The units and formula for various electrical parameters included in the page. Ph.D(Chemistry), B.Ed, VTU, Karnataka carbon & its compounds

E = 2970J. nazma sk Electric power is measured in watts. Power is defined as work done in unit time or energy used in unit time. Thus: The power of a pump motor is 4KW. Since the object has reached a constant speed, the net force on it must be zero.

in maintaining the current in an electric circuit for a given time:1joule = 1watt × 1 second = 1volt × 1ampere × 1secondThe number of units of electricity consumed is n = (total wattage × time in hour)/1000The cost of consumption of electricity in a house = no. t = 60s.

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master cbse x chemistry Density of water = 10r = radius of pipe = 1.2m, average speed of water v = 12 m/sNow, kinetic energy of rushing water per second i.e. 2 Electric Power Formula Examples.