2. 1 1. SI 2. 3. 4. 5. 3. 1.1 1.1
http://dargv.net/images/electric-circuit.gif 1.1 3 1) 2) (Load) 3)
1.1 (Unit) SI (International System of Units) SI 6 1.1 4. 1.1 SI
(meter)m(kilogram) kg(second) s (Ampere) A (Kelvin) K (Candela)cd
(Derived SI Unit) /(m/s) (m2) SI SI 1.2 1.2 SI f Hzp P V V t s P W
radTK --m R G S IA 5. 1.2 SI () s m m kg rad/s SI 1,000 3 (Prefixs)
1.3 1.3 (Prefixs) (exa)E1 1018 (peta)P 1 1015(tera)T1 1012(giga)G1
109 (mega)M1 106(kilo)K1 103(unit)-1 100 1 (milli) m1 10-3 (micro)
1 10-6(nano) n 1 10-9 (pico)p 1 10-12 (femto)f 1 10-15(atto)a 1
10-18 6. 600,000,000 mm = 600,000 m = 60 km 50 A + 0.5 mA= 50 A +
0.5 10-3 A = 50 A + 0.0005 A = 50.0005 A 50 A + 0.5 mA = 50 103 mA
+ 0.5 mA = 50,000 mA + 0.5 mA = 50,000.5 mA (milli) (Mega) =
(kilo)10-3 106= 1031.2 (Charge) Q (C) 3 1.602 1018 1.3 (Current) I
(A) Q I (1.1) tI (A) Q (C) 7. t (s) Q It(1.2) 2 (direct current)
(DC) I 1.2 i (Sinusoidal Current) (Alternating Current) (AC) 1.3
1.4 (Voltage) (Electromotive force) emf 1.4 8. 1.4 (Voltage)
(Potential difference) V (V) W V(1.3)Q W (J)Q (C)V (V) V E 1.5
(Resistance) (Conductance) R () G (S) 1G (1.4)R 1R (1.5)G 9. 1.6
(Ohms Law) (A) (l) 1.5(a) (b) 1.5 lR (1.6)A - (-m) 1.4 1.4 (-m)
1.64 10-8 1.72 10-8 2.8 10-8 2.45 10-8 4 10-5 47 10-2 6.4 102 1010
10. 1.4 () (-m) 5 1011 1012 2 1012 (Georg Simon Ohm) EI (1.7)R I
(A)E (V)R () E IR(1.8) ER (1.9) I 11. 1.1 12 10 1.6 E I R 12 V 1.2
A 10 1.2 10 200 1.7 E IR 10 A 200 2000 V 2 kV 12. 1.3 9 3 1.8E R I
9V3 mA 9V3 10 - 3 A 3 10 3 3 k1.7 (Electrical Power) (V) (A) P (W)
P IE (1.10) P (W)I (A)E (V) 1.10 P I2R(1.11) E2 P (1.12) R 13. P,
E, I, R 1.4 5 k 30mA 1.9 P I2R (30 mA) 2 5 k (30 10 -3 ) 2 5 10 3
4.5 W 14. 1.5 2 100 1.10 P IE 100 V 2 A 200 W1.8 (Electrical
Energy) (Load) - (Watt-Hour) W W Pt(1.13)W - (W-s) P (W) t (s) -
(Watt-Second) 1 1 1 (Joule) - (Watt-Hour) 1 1 - (Kilowatt-Hour)
1,000 1 1 1 (Unit) 1 (Unit) = - (kW-Hour) 15. 1.6 100 15 6 2 W Pt
100 15 6 9,000 - 9 - 9 2 9 2 18 1.7 1. 70 5 2. 1,000 30 3. 1,500 1
4. 75 5 5. 300 24 1 2.50 W Pt (70 5) + (1,000 0.5) + (1,500 1) +
(75 5)+ (300 24) 350 + 500 + 1,500 + 375 + 7,200 1 9,925 - 9.925
9.925 2.50 9.925 2.50 24.8125 1 24.8125 30 744.375
