Advertisements
Advertisements
Question
Advertisements
Solution
APPEARS IN
RELATED QUESTIONS
Define Electric power.
Define watt. Write down an equation linking watts, volts and amperes.
An electric motor takes 5 amperes current form a 220 volt supply line. Calculate the power of the motor and electric energy consumed by it in 2 hours.
The unit for expressing electric power is:
(a) volt
(b) joule
(c) coulomb
(d) watt
The commercial unit of energy is :
(a) watt
(b) watt-hour
(c) kilowatt-hour
(d) kilo-joule
Two bulbs are rated 60 W, 220 V and 60 W, 110 V respectively. Calculate the ratio of their
resistances
A potential difference of 6 V is applied across a 3 Ω resistor. What is the current flowinq throuqh the circuit?
State (i) the S. I. unit, (ii) the household unit, of electrical energy. How are these units related?
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:
