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Why do you represent current as 'i' even though its unit is ampere?
Wiki User
∙ 10y ago
I is just a sign assigned to represent current in equations and ampere stands for its unit of measurement. So I equals V divided by R where I stands for current, V stands for voltage, and R stands for resistance. And thats just as representation all 3 representations have their own measurement units: For I its Ampere, for V its Volts and for R its ohm's.
Wiki User
∙ 10y ago
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If voltage is below 30 volt human body can bear many amperes but if voltage is above 30, even micro ampere is not bearable .
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In a light circuit with a constant voltage what is the effect on the current if the light bulb is doubled?
If you add one extra bulb and the voltage remains constant, then you have doubled the current drained from the regulator. 12 Volt and One 12 Watt lightbulb drains 1 Ampere Current. 12 Volt and Two 12 Watt light bulbs drains 2 Ampere Current. However: If having a 24 volt powersource and you add two 12 Volt 12 Watt in serial, then you still only drain 1 Ampere Current. NOTE: Wattage and Voltage of bulbs may be different even if the sockets are the same. Lower voltage on the bulb will increase the current drain, if voltage is a lot lower it might cause the circuit delivering voltage to burn out or blow a fuse. It can also quickly burn the bulb, sometimes in a fraction of a second. It will however do little damage to add a bulb with higher voltage than the circuit is designed for. You will then only observe that you do not get the light you might hope for. Total Current/Ampere= Combined Wattage divided by Voltage Total Wattage = Combined Current or Ampere multiplied by Voltage. Regards.
Why does the current in an electric circuit decrease when more bulbs are added?
If you add one extra bulb and the voltage remains constant, then you have doubled the current drained from the regulator. 12 Volt and One 12 Watt light bulb drains 1 Ampere Current. 12 Volt and Two 12 Watt light bulbs drains 2 Ampere Current. However: If having a 24 volt power source and you add two 12 Volt 12 Watt in serial, then you still only drain 1 Ampere Current. NOTE: Wattage and Voltage of bulbs may be different even if the sockets are the same. Lower voltage on the bulb will increase the current drain, if voltage is a lot lower it might cause the circuit delivering voltage to burn out or blow a fuse. It can also quickly burn the bulb, sometimes in a fraction of a second. It will however do little damage to add a bulb with higher voltage than the circuit is designed for. You will then only observe that you do not get the light you might hope for. Total Current/Ampere= Combined Wattage divided by Voltage Total Wattage = Combined Current or Ampere multiplied by Voltage. In simpler words: If you double the bulbs, twice the current is drained from the battery
If your skin has a resistance of 100000 ohms and you touch a 9 volt battery what current will flow through you?
The current through 100,000 ohms with 9 volts applied is (9/100000) = 0.00009 Ampere = 0.09 mA (milliampere) = 90 uA (microamperes). Even if this level of current goes in one hand and out the other, you don't notice it, and neither does the battery.
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