1) a heater is rated 1500w,250v caluculate
a.the current drawn
b. the energy consumed in 50hrs
c. the cost of energy at $2.20 per kwhrs.
2)caluculate the cost of running a 500w heater for hr daily with 200w lamp for 3hr at $2.05per unit?
3) a current of 3a flows through a wire whose loose ends are at a potential differenceof 15v.caluculate
a)resistance
b)heat produced
4)assume that u have 5 one thousand ohm resistors
a)devise a circuit with a equivalent resistence of 1333ohms.
b)devise cicuit with an equilant resistance of 750ohms.
5)an electric kettle is rated 3kw,250v..give resons whether or not this kettle should be used in a circuit which contains a13A fuse?
6) an electric bulb B1(220V,60W) IS CONNECTED IN SERIES WITH ANOTHER ELECTRIC BULB B2(220V,45V)WHEN THEY BOTH ARE CONNECTED IN SERIES TO 220V SUPPLY..WHICH WILL GLOW BETTER???
PLEASE PLEASE HELP ME ..I HAVE NO CLUE
a.the current drawn
b. the energy consumed in 50hrs
c. the cost of energy at $2.20 per kwhrs.
2)caluculate the cost of running a 500w heater for hr daily with 200w lamp for 3hr at $2.05per unit?
3) a current of 3a flows through a wire whose loose ends are at a potential differenceof 15v.caluculate
a)resistance
b)heat produced
4)assume that u have 5 one thousand ohm resistors
a)devise a circuit with a equivalent resistence of 1333ohms.
b)devise cicuit with an equilant resistance of 750ohms.
5)an electric kettle is rated 3kw,250v..give resons whether or not this kettle should be used in a circuit which contains a13A fuse?
6) an electric bulb B1(220V,60W) IS CONNECTED IN SERIES WITH ANOTHER ELECTRIC BULB B2(220V,45V)WHEN THEY BOTH ARE CONNECTED IN SERIES TO 220V SUPPLY..WHICH WILL GLOW BETTER???
PLEASE PLEASE HELP ME ..I HAVE NO CLUE