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Power

power electricity confusion related to formula

Asked by 16th March 2008 5:05 PM

sir can u say that an wind mill produce electric current/hour

Asked by Tushar 9th September 2014 9:26 PM

An electric oven of 2KW power rating is operated in a domestic electric circuit(220v)that has a current rating of 5Amp. what result do you expect? Explain

Asked by abhinav732382 8th November 2017 8:26 PM

Power of a lamp is 60W.  Find the energy in joules consumed by it in 1s.

Asked by pdcavita 26th November 2017 9:33 PM

What is the maximum power in kilowatts of the appliance that can be connected safely to 13A, 230V main socket?

Asked by pdcavita 26th November 2017 9:37 PM

4th ques

Asked by lovemaan5500 2nd December 2017 7:13 AM

What is the power of a machinethat can lift a load of 750N through 15m in 5 sec? What must have been the effort applied? Obtain the M.A. and V.R. of this machine. Assume the machine to be an ideal one and take the distance moved by the effort as 45m.

Asked by bdroy_2014 25th January 2018 1:16 PM

volt^2/watt=___________ A)Power                    B)Current                C)Resistance               D)Potential difference

Asked by shailesh.solanki 9th February 2018 11:35 AM

It takes 20s for a person A to climb up stairs while the other person B does the same in 15s. compare the (1) work done (2)power developed by person A and B

Asked by Muruga 19th February 2018 8:23 PM

CBSE XII Science Physics

Asked by Varsneya Srinivas 21st February 2018 8:59 PM

A refeigerator is marked 80W and 220V What is likely to happen if the voltage is reduced to 50V

Asked by lovemaan5500 15th March 2018 7:21 AM

A water pump lifts water from a level 10 m below the ground. Water is pumped at a rate of 30 kg/minute with negligilble velocity. What should be the power ( in h.p.) of engine to do this ?

Asked by dipanshusingla029 3rd April 2018 5:49 PM

What power is required to 10liters of water to a height of 6m, in one minute through a pipe of 1.25cm diameter ?

Asked by anirbanbag81 4th April 2018 5:19 AM

define  1) power 2)work 3) energy

Asked by nathsantanukumar 11th April 2018 5:17 PM

differentitate  1)kinetic energy and potential energy  2)energy and power

Asked by nathsantanukumar 12th April 2018 5:02 PM

NEET1 NEET1 Physics

Asked by minipkda 24th May 2018 6:57 AM

State which has a higher resistance .A 50 Watt or a  25 Watt lamp .Also find the ratio of their resistances.

Asked by riyamaths 1st June 2018 9:22 AM

A car exserting a force of 2250 Newton accelerates uniformly so that it acquires a velocity of 72 km per hour find the horsepower required to maintain its velocity

Asked by Samrat 30th June 2018 9:57 AM

A train of mass 160000 kg is moving on a level track at 54 km per hour if the frictional resistance to the motion is 5kgf per 1000 kg what is the power developed by engine

Asked by Samrat 30th June 2018 7:07 PM

A car along with passengers weighs  2000 kg it accelerates from 36 km per hour to 90 km per hour in 10 seconds calculate a.acceleration b. Distance  covered by car while accelerating c. momentum of car after 10 second d.force developed by the engine of car e.Total energy expanded during accelerationf. power of the engine in Kilowatt

Asked by Samrat 30th June 2018 7:18 PM

A machine is driven by a 100 kg mass that falls 8 m in 4 seconds it lifts a load of 500 kg vertically upwards a.what is the force in Newton exerted by falling mass b.what is the work done by 100 kg mass falling through 8 m c. what is the power input to the machine d. If  the efficiency of the machine 75% what is the power output of the machine e.what is the work done by the machine in 4 sec

Asked by Samrat 30th June 2018 7:24 PM

A machine is given by a 200 kg mass falling at 8 m in 5 second lifts a load of 100 kg calculate the power input the machine if the efficiency of machine is 80% calculate the height of to which the load is raised in 5 seconds

Asked by Samrat 30th June 2018 11:10 PM

A 240 V ac mains circuit to which a number of appliances are connected & switched on. 240 ac-Fan(1.2KW)-Refrigerator(200 watt)-two bulbs(60w each,parallely) 1. Calculate the power supplied to the circuit. 2.calculate a) The current in the refrigerator. b) The energy used by the fan in 3 hours c)The resistance of filament of one bulb.

Asked by agraharianiruddha 26th July 2018 7:15 PM

Express the power of a 100watt bulb in CGS unit

Asked by valavanvino1011 8th August 2018 4:33 PM

compare the work done and power of pallavi and parul when both of them can lift the same bag of 20kg to a height of 50cm. in 2and 5 seconds respectively(Take g=10ms-2)

Asked by sujanasudheer37 10th September 2018 10:17 PM

A train starting from rest at one station, acclerates uniformly and attains a speed v after sometime. After travelling at this speed for sometime, it retards uniformly and stop at the next station. If R be the uniform resistance of the given track and the duration of the uniform motion is just half the total journey time, the average power supplied by the train engine is:- a) (vR)/2 b) (3vR)/2 c) (3vR)/4 d) (vR)/4

Asked by acv27joy 16th September 2018 12:47 PM

An electric pump has 2kW power. How much water it can lift every minute to height of 10m?

Asked by sagareharsh123 20th September 2018 4:31 PM

A block of mass m is placed at relative equilibrium on an inclined plane which itself is placed on a lift moving upwards with constant velocity . If the friction coefficient between block and plane is    , find the instantaneous power supplied by friction to the block??  a) mgsin (2)/2 , b)  mg sin^2, c) mgsin(2)/2 , d) mgcos^2

Asked by patra04011965 26th September 2018 10:15 PM

Pls solve it

Asked by Vijaybhan07 2nd October 2018 4:41 PM

Find the value of (3²)³ + {(-2³)}³ + {-(2³*3³)-8º}

Asked by Keshrisanjay333 14th October 2018 10:47 AM

how to find 2^(2/3)?

Asked by saxenas55555 27th October 2018 1:34 PM

If an appliance of power P watt be s used for time t hour ,how much electrical energy is consumed in kwh

Asked by alwindcruz45 30th October 2018 7:56 PM

which requires a thicker connecting wire: 100W-220V or 1500W-220V

Asked by nidhimehendre 6th January 2019 12:38 PM

discuss about the qualitative Idea resolving power of astronomical telescope

Asked by ap996969 23rd January 2019 6:01 PM

derive the unit of power...???  fasttttt

Asked by edayoor 8th March 2019 7:53 PM

1 kilo watt = ?

Asked by ransinghkanoh 18th March 2019 11:04 AM

ICSE X Physics Current Electricity

Asked by defence 4th April 2019 7:20 PM

A electric heater rated 220v and 550v is connected to ac mains the current drawn is?

Asked by cmyogesh2002 11th April 2019 8:18 AM

A hydroelectric power station takes its water from a lake whose water level is at a hight of 50m above the turbine, Assuming an overall efficiency of 40 %, calculate the mass of water which must follow through the turbine each second to produce power output of 1MW.   Pls solve this question clearly step by step so that i can understand

Asked by krcraju1973 19th May 2019 1:03 PM

an athelete keeps himself fit by doing press ups.he applies a force of 300N as he pushes up to a distance of 0.5m.he does press ups in 30s.What is the average output in 30s?

Asked by Kanwaranita10 10th July 2019 8:29 PM

WHAT IS THE POWER OF X SQUARE  DIVIDED BY Y SQUARE

Asked by jpassociates56 14th August 2019 12:43 PM

NEET NEET Physics

Asked by brijk456 4th September 2019 11:50 PM

explain all the derivations of chapter-work power energy

Asked by ABHILASHA 16th September 2019 6:55 PM

NEET NEET Physics

Asked by Prashant DIGHE 17th September 2019 10:01 PM

Calculate the power in the following case :  Mass=73k; g =9.8ms^-2;s=37m; t=8.9 s

Asked by anithasaran2014 20th September 2019 6:41 AM

1÷2^3×5^2

Asked by anila.shaji1 20th October 2019 10:49 PM

NEET NEET Physics

Asked by anjanakurup728 26th October 2019 8:15 AM

A hudroelectric power station takes its water from a lake whose water level is at height of 50m above the turbine. Assuming an overall eficiency of 40% calculate mass of water which must flow through turbine each second to produce power output of 1 MW. (take g=10m/s).

Asked by dkpanch76 24th December 2019 3:30 PM

Is electric power related to time?

Asked by mahulejaya 5th January 2020 12:36 PM

What is potential energy,kinetical energy,power?

Asked by mohammedfayas007 17th January 2020 9:17 PM

Machine left side of 200 kg in vertically upward direction if the machine is driven by freely falling mass of 40 kg through a distance of 8 metre in 4 second calculate force exerted by falling mass work done by falling mass power input of machine power output of machine if its efficiency is 75%

Asked by saritamehta3010980 23rd January 2020 1:24 PM

ch. work

Asked by nilesh.dhote74 27th April 2020 5:57 PM

ch. work power energy

Asked by nilesh.dhote74 27th April 2020 5:58 PM

work ch.

Asked by nilesh.dhote74 27th April 2020 6:03 PM

power numerical

Asked by nilesh.dhote74 27th April 2020 6:13 PM

conpare the worl done

Asked by nilesh.dhote74 27th April 2020 6:18 PM

how to find the displacement

Asked by nilesh.dhote74 28th April 2020 10:10 PM

What is power

Asked by devaniekta 30th April 2020 3:31 PM

ex. 2c q 5

Asked by nilesh.dhote74 30th April 2020 5:06 PM

A electric rerfrigerator rated 400 watt generator 8hour/day.what is th cost of energy to operate it for 30 days at rs.3.00 per kwh

Asked by himanglodhi2 12th May 2020 9:52 AM

exercise 8b q 14

Asked by nilesh.dhote74 13th May 2020 11:16 AM

exercise 8c numerical 21

Asked by nilesh.dhote74 13th May 2020 1:19 PM

Two lamps rated (100w, 220v) and (60w, 220v) are connected in parallel. which lamp consumes more energy and which one gives more brightness? Find the resistance of each lamp. ( Take supply voltage as 220 v).

Asked by niharikag_2004 3rd June 2020 4:00 PM

Find power dissipated in 3ohm resistor

Asked by meeragurumani2000 14th July 2020 9:38 AM

⭕ Explain in detail...!

Asked by vidyavikram10 28th August 2020 6:33 AM

Define Power

Asked by zainak698 27th October 2020 11:52 AM

power of a lens is found to be + 2.5 Diopter what kind of lens is it

Asked by rathodveeru41 18th December 2020 10:02 PM

power of a lens is found to be + 2.5Diopter what kind of lens is it

Asked by rathodveeru41 19th December 2020 10:33 AM

calculate the current of X resistor and power of X resistor

Asked by babberkavita 7th January 2021 2:12 PM

An engine pumps a fluid of density 1200 kg/m cube through a tube of cross -section area of 4 cm square through a height of 5 m with a speed of 40 cm/s.Find the power of engine

Asked by ayan1.chatterjee 13th January 2021 12:05 PM

a current of 4 amp flows in a wire of resistance 60 2. calculate: (a) power dissipated in the wire. (b) potential difference across the wire. (c) electrical energy consumed in 2 minutes.

Asked by ashrafali8060 4th May 2021 6:53 PM

what is the power of torch bulb rated at 2.5V and 500 mA?

Asked by sunilgupta9419158173 20th July 2021 1:14 PM

physics

Asked by dlakshmisrinivas 7th August 2021 9:46 AM

An elevator is designed to lift a load of 1000 kg with uniform velocity of 2m/s . Power of the elevator will be?

Asked by tajbindarkaurs 14th November 2021 10:19 AM

A motor drill draws 3.5 A current at the power line voltage 120 V(RMS). What is the motor's power if the current lags the voltage by 20 degrees?

Asked by arjunsah797 29th March 2022 7:25 AM

Please solve this.. Calculate the power spent by a crane while lifting a load of mass 2000 kg, at velocity of 1.5 m/s. (g = 10m * s ^ - 2)

Asked by sagarmishra 18th March 2023 8:02 PM

3)A body does 20 joules of work in 5 seconds what is power

Asked by mailtoparvathyprajith 6th February 2024 9:00 PM

Power unit

Asked by rosysahu678 2nd March 2024 6:09 PM

three bulbs are connected in series after two bulbs s key is connected in parallel then what will be the total power p is?

Asked by avneetsingh09 9th March 2024 1:18 PM

JEE Main Maths Co-ordinate Geometry

Asked by vasavipanchakoti 22nd March 2024 8:16 PM