Advertisements
Advertisements
प्रश्न
Advertisements
उत्तर
We know that, E =Pt
Given, P = 60 W= 0.06 kW
and, t = 50 hours
.·. E=0.06 x 50=3kWh
APPEARS IN
संबंधित प्रश्न
An electric bulb is rated at 220 V, 100 W. What is its resistance?
An electric iron is rated at 750 W, 230 V. Calculate the electrical energy consumed by the iron in 16 hours .
A bulb with rating 250 V, 100 W is connected to a power supply of 220 V situated 10 m away using a copper wire of area of cross-section 5 mm2. How much power will be consumed by the connecting wires? Resistivity of copper = 1.7 × 10−8 Ωm
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?
Tick(✓) the correct choice in the following:
In the circuit shown in the following fig, the e.m.f. of the cell is 4 volts, the current
flowing through the resistor is

Household wiring for lamp connections can either be done in parallel or in series.Which one would you prefer? Give a reason for your answer.
Name a metal that is used as an electron emitter. Give one reason for using this metal.
How is the amount of heat produced calculated due to the passage of current in a metallic conductor? Derive an expression for it.
