1.
a) By Ohm's Law: I = V/R = 5Volts/50Ohms = 0.1A.
b) If I = 1A and V = 5Volts, R = V/I (Ohm's Law) = 5Volts/1A = 5 Ohms.
2.
a) R1: 20 * 101 = 200 Ohms.
b) R2: 42 * 100 = 42 * 1 = 42 Ohms.
c) R3: 53 * 102 = 53 * 100 = 5,300 Ohms.(5.3KOhms)
d) R4: 67 * 103 = 57 * 1000 = 67,000 Ohms.(67KOhms)
e) R5: 98 * 101 = 980 Ohms.
3.
There is 1000mA in 1A, so we must multiply by 1000 to get from Amps to Milliamps:
a) 0.1A = 100mA.
b) 12 A = 12,000mA.
c) 0.05A = 50mA.
d) 3A = 3,000mA.
There is 1000 Ohms in 1 K Ohm, so we divide by 1000 to get from Ohms to K Ohms.
e) 10 Ohms = 0.01 KOhms.
f) 520 Ohms = 0.52 KOhms.
g) 7500 Ohms = 7.5 KOhms.
h) 100 Ohms = 0.1 KOhms.
4.
a) If the 4th band is silver the tolerance is 10%.
b) If the 4th band is gold the tolerance is 5%.
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