VW as in Volkswagen I suppose...
The resistance of an incandescent(glow wire) bulb depends on the power - the wattage.
The formula you are looking for is R = E squared/W
As per the formula for power (Power (Watt) = Voltage (V) x Current (i) & Resistance (R) = V / i), 25w lamp bulb would have higher resistance compared to that of 5w lamp bulb.
40W Bulb will spiol due to over current passing through its coilAnswerSince the 40-W lamp has a higher resistance than the 100-W lamp, the greater voltage drop will appear the 40 W lamp. As a result the 40 W lamp will be subjected to a voltage beyond its 100-V rating, and the 100-W lamp will be subjected to a voltage below its 100-V rating. Therefore, the 40-W lamp will burn much more brightly than the 100-W lamp.Incidentally, the symbols for the 'watt' and 'volt' are upper, not lower, case: W and V.
The relation between resistance R, Current I and voltage V is: R= V/I Therefore: 60 = 12 / I <=> I = 12 / 60 = 0.2 amp
The formula you are looking for is R = E/I. Resistance is stated in ohms.
Current = Voltage/Resistance Current = 18/10 = 1.8 A
The amps times the volts equals the watts. A 120 v 60 w lamp takes ½ amp, while a 240 v 60 w lamp takes ¼ amp
The idea is to use Ohm's Law (V=IR). In this case, the relevant voltage is the 10.2 V across the lamp.
It depends! If you have, say, two 100-W/120-V lamps, you could connect them in parallel across a 120-V supply, or in series across a 240-V supply, in which case they would be equally bright for both connections. If, on the other hand, you had a 100-W/120-V lamp and a 60-W/120-V lamp and connected them in parallel across a 120-V supply then they would operate at their normal rated brightness, but if you connected them in series across a 240-V supply, the 60-W lamp will be much brighter and the 100-W lamp would be much dimmer!
The formula you are looking for is R = E(sq)/W.
v/i=r so 120/0.25=480 480 ohms is the resistance
Because the filament of a 25-W lamp has a higher resistance than that of a 60-W lamp and, therefore, will experience a greater voltage drop -the lamp with the voltage drop closer to its rated voltage (in this case, the 25-W lamp) will be the brighter.