मराठी
महाराष्ट्र राज्य शिक्षण मंडळएस.एस.सी (इंग्रजी माध्यम) इयत्ता १० वी

If a Bulb of 60w is Connected Across a Source of 220v, Find the Current Drawn by It.

Advertisements
Advertisements

प्रश्न

If a bulb of 60W is connected across a source of 220V, find the current drawn by it.

Advertisements

उत्तर

Power P = 60W, Voltage V = 220. To find eye ?

We have current `I = P/V = 60/220= 0.272 A`

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
2017-2018 (March)

APPEARS IN

संबंधित प्रश्‍न

An electric bulb is rated at 220 V, 100 W. What is its resistance?


Define watt. Write down an equation linking watts, volts and amperes.


An electric fan runs from the 230 V mains. The current flowing through it is 0.4 A. At what rate is electrical energy transferred by the fan?


 How many joules are there in one kilowatt-hour?


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


Why is an electric light bulb not filled with air? Explain why argon or nitrogen is filled in an electric bulb.


In a filament type light bulb, most of the electric power consumed appears as:

(a) visible light
(b) infra-red-rays
(c) ultraviolet rays
(d) fluorescent light


1k Wh = ______J


Calculate the current through a 60 W lamp rated for 250 V. If the line voltage falls to 200 V, how is the power consumed by the bulb affected?


A current of 0.2 A flows through a wire whose ends are at a potential difference of 15 V.
calculate:
(i) the resistance of the wire and
(ii) the heat energy produced in 1 minute.


Two resistors A and B of resistance 4 Ω and 6 Ω respectively are connected in parallel. The combination is connected across a 6 volt battery of negligible resistance. Calculate: (i) the power supplied by the battery, (ii) the power dissipated in each resistor.


A current passes through a resistor. Let K1 and K2 represent the average kinetic energy of the conduction electrons and the metal ions, respectively.


A potential difference of 6 V is applied across a 3 Ω resistor. What is the current flowinq throuqh the circuit?


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

What is the usual colour code followed for connecting live, neutral and earth wires?

An electric filament lamp is connected to a supply of voltage higher than the recommended value. Give reasons, why compared with a normal performance, the lamp emits a brighter light and its life is shortened.


Two lamps are rated 220V, 50W and the other rated 220V, 100W are connected in series with the mains of 220 V. Explain, why the 50W lamp glows more?


What is the function of the split rings in a d.c. motor?


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 heat energy dissipated in the bulb in 10 minutes.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×