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- Why most appliances in the Phillipines are designed to work on an electrical supply of 230V at 60Hz and why is it Phillipiness supplied 230 V?Suppose your portable DVD player draws a current of 350 mA at 6.00 V. How much power does the player require?A portable galvanometer is given a full-scale deflection by a current of 5.00 mA. If the resistance of the meter is 12.0 Ohms, what series resistance must be used with it to measure voltages up to 300 Volts?
- A color television set draws about 1.9 A when connected to a 220-V source. What is the cost (in Rands) of running the set for 12.6 days, given that electricity costs 7.8 cents / kWh?A certain laboratory experiment requires an aluminum wireof length of 32.0 m and a resistance of 2.50 Ω at 20.0°C. Whatdiameter wire must be used?The largest number of 100 W electric light bulbs which can be operated from a 240 V supply fitted with a 13 A fuse is:
- How many volts are supplied to operate an indicator light on a DVD player that has a resistance of 140 Ω , given that 25.0 mA passes through it?Of what material is a resistor made if its resistance is 40.0% greater at 100.0 °C than at 20.0 °C ?The resistance of an electric heater is 70 Ω when connected to 120 V. How much energy does it use during 10 min of operation?
- A hair dryer draws 9.3 A when plugged into a 120-V line. How much charge passes through it in 19 minmin ? (Assume direct current.)A certain medical device has a resistance of 2 kilo-Ohm and is rated for 20 Watts. What is the maximum voltage, in V, it can safely handle?When measuring a potential difference of 10 volts, how much current is drawn by a voltmeter with 10 megaohms (10 x 10^6)?