English

At What Frequency is Ac Supplied to Residential Houses? - Physics

Advertisements
Advertisements

Question

At what frequency is AC supplied to residential houses?

Solution

The residential houses are supplied with AC of frequency 50 Hz.

shaalaa.com
  Is there an error in this question or solution?
2014-2015 (March) Science Paper 1

RELATED QUESTIONS

Name the quantity whose unit is (i) kilowatt, and (ii) kilowatt-hour.


Calculate the cost of operating a heater of 500 W for 20 hours at the rate of Rs 3.90 per unit.


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


Define electric power. What do you mean by 'power rating' of an electric appliance?

What is the energy conversion when an electric current passes through a metallic wire?


Why does not the heating coil produce any visible light? in an electric stove.


Three 250 W heaters are connected in parallel to a 100 V supply, Calculate the energy supply in kWh to the three heaters in 5 hour.


Two resistances R1 = 4Ω and R2 = 6Ω are connected in series. The combination is connected with a battery of e.m.f. 6V and negligible resistance. Calculate:
(i) the heat produced per minute in each resistor,
(ii) the power supplied by the battery.


A house is provided with 15 bulbs of 40W, 5 bulbs of 100W, 5 fans of 80 W, and one heater of 1.0 kW. Each day bulbs are used for 4h, fans for lOh, and heater for 2h. The voltage of mains is 220 V. Calculate:
(i) Maximum power of the circuit in the house,
(ii) maximum current capacity of the main fuse in the house,
(iii) the electrical energy consumed in a week,
(iv) cost of electricity consumed at 1.25 Rs. per kWh.


A student wants to use an electric heater, an electric bulb and an electric fan simultaneously.

How should these gadgets be connected with the mains? Justify your answer giving three reasons.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×