Advertisements
Advertisements
प्रश्न
State two factors on which the electrical energy consumed by an electrical appliance depends.
Advertisements
उत्तर
Two factors on which electrical energy consumed by an electrical appliance depends on are:
(1) power
(2) time
APPEARS IN
संबंधित प्रश्न
Which quantity has the unit of watt?
What is the meaning of the symbol kWh? Which quantity does it represent?
When an electric lamp is connected to 12 V battery, it draws a current of 0.5 A. The power of the lamp is:
(a) 0.5 W
(b) 6 W
(c) 12 W
(d) 24 W
The commercial unit of energy is :
(a) watt
(b) watt-hour
(c) kilowatt-hour
(d) kilo-joule
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.
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?
What is the current I in the given circuit (Fig. )?
What are the two main systems of wiring commonly used in houses? Which of these systems mentioned by you is better and why?
In an electric radiator or room heater, state with reason, why the porcelain tube wound with a nichrome wire is placed between the pole and principal focus of the parabolic concave reflector.
Why is the heating element of an electric oven wound on a helix? State the reason.
Find the heat produced in joules when a current of 10 amperes flows through a connecting wire of resistance 2 × 10-2 ohms and heating element of resistance 250 ohms for 2 seconds.
Find the cost of operating an electric toaster for two hours if it draws 8 A current on a 110 volt circuit. The cost of electrical energy is Rs. 2.50 per kWh.
Electric power is inversely proportional to ____________.
The average work done by a human heart while it beats once is 0.5 Joule. The power used by heart if it beats 72 times in a minute:
