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
State whether an electric heater will consume more electrical energy or less electrical energy per second when the length of its heating element is reduced. Give reasons for your answer.
Electrical power p is given by the expression P = (Q × V) ÷ time. Express the power P in terms of current and resistance explaining the meaning of symbols used there in.
A potential difference of 6 V is applied across a 3 Ω resistor. What is the current flowinq throuqh the circuit?
What is electric power? State and define its S.I. unit.
What changes in energy occur in an electric bulb?
Why does not the heating coil produce any visible light? in an electric stove.
State other bigger units of electric power and express them in watt.
I ampere of current is passed through a resistor of resistance R ohm for time t second. Obtain expression for
(i) the electrical energy, and
(ii) the electrical power spent.
Two bulbs are rated: bulb A 100W, 120 V bulb B 10W, 120 V. If both are connected across a 120V supply, which bulb will consume more energy, When in series? Also calculate the current through each bulb in above cases.
In the given figure, the emf of the cell is 2.2 V, and if internal resistance is 0.6 Ω. Calculate the power dissipated in the whole circuit.
