मराठी

In a House Two 60 W Electric Bulbs Are Lighted for 4 Hours, and Three 100 W Bulbs for 5 Hours Every Day. How Much is the Electric Energy Consumed During the Month of June? - Physics

Advertisements
Advertisements

प्रश्न

In a house two 60 W electric bulbs are lighted for 4 hours, and three 100 W bulbs for 5 hours every day. How much is the electric energy consumed during the month of June?
संख्यात्मक
Advertisements

उत्तर

Case (i) Energy consumed by two bulbs per day

= 2 x `60 /1000` x 4= 0.48 kWh

Case (ii) Energy consumed by three bulbs per day

= 3 x `100/1000` x 5 = 1. 5 kWh

:. total energy consumed per day = 0.48 + 1.5 = 1.98 kWh
Required consumption of electrical during the month of June (30 days)=
= 1.98 x 30 = 59.4 kWh

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 4: Current Electricity - Exercise 4.2 iii [पृष्ठ १८९]

APPEARS IN

फ्रँक Physics - Part 2 [English] Class 10 ICSE
पाठ 4 Current Electricity
Exercise 4.2 iii | Q 5 | पृष्ठ १८९

संबंधित प्रश्‍न

An electric lamp is labelled 12 V, 36 W. This indicates that it should be used with a 1 V supply. What other information does the label provide?


An electric heater of resistance 8 Ω takes a current of 15 A from the mains supply line. Calculate the rate at which heat is developed in the heater. 

 


A current of 2 A is passed through a coil of resistance 75Ω for 2 minutes. (a) How much heat energy is produced? (b) How much charge is passed through the resistance?


A bulb of 40 W is used for 12.5 h each day for 30 days. Calculate the electrical energy consumed.


An electric bulb is rated 250 W, 230 V. Calculate:

  1. the energy consumed in one hour
  2. the time in which the bulb will consume 1.0 kWh energy when connected to 230 V mains.

An electric kettle is rated 2.5 kW, 250 V. Find the cost of running the kettle for two hours at Rs. 5.40 per unit.


An electric bulb, when connected across a power supply of 220 V, consumes a power of 60 W. If the supply drops to 180 V, what will be the power consumed? If the supply is suddenly increased to 240 V, what will be the power consumed?


State the S.I. units of electrical power and electrical energy.
(i) Define the household unit of electricity.
(ii) What is the voltage of the electricity that is generally supplied to a house?


A bulb is connected to a battery of e.m.f. 6V and internal resistance 2Ω A steady current of 0.5A flows through the bulb. Calculate the resistance of the bulb.


Two bulbs are rated: bulb A 100W, 120 V bulb B 10 W, 120 V. If both are connected across a 120V supply, which bulb will consume more energy, When in parallel? Also calculate the current through each bulb in the above cases.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×