Shortcut Methods
JEE Mains
Electric power
- 1 MW = 1000 kW = 10^6 W
- 10 MW = 10,000 kW = 10^7 W
- 100 MW = 100,000 kW = 10^8 W
Electric energy
- 1 kWh = 1000 Wh = 3.6 MJ
- 10 kWh = 10,000 Wh = 36 MJ
- 100 kWh = 100,000 Wh = 360 MJ
Current
- 1 A = 1 C/s
- 10 A = 10 C/s
- 100 A = 100 C/s
Voltage
- 1 V = 1 J/C
- 10 V = 10 J/C
- 100 V = 100 J/C
Resistance
- 1 Ω = 1 V/A
- 10 Ω = 10 V/A
- 100 Ω = 100 V/A
Capacitance
- 1 µF = 10^-6 F
- 10 µF = 10^-5 F
- 100 µF = 10^-4 F
Inductance
- 1 mH = 10^-3 H
- 10 mH = 10^-2 H
- 100 mH = 10^-1 H
Frequency
- 50 Hz = 50 cycles/s
- 60 Hz = 60 cycles/s
- 100 Hz = 100 cycles/s
Power factor
- 0.5 = 50%
- 0.7 = 70%
- 0.9 = 90%
CBSE Board Exams
Electric power
- 1 kW = 1000 W
- 5 kW = 5000 W
- 10 kW = 10,000 W
Electric energy
- 1 unit = 1 kWh = 3.6 MJ
- 10 units = 10 kWh = 36 MJ
- 100 units = 100 kWh = 360 MJ
Current
- 1 A = 1 C/s
- 5 A = 5 C/s
- 10 A = 10 C/s
Voltage
- 1 V = 1 J/C
- 5 V = 5 J/C
- 10 V = 10 J/C
Resistance
- 1 Ω = 1 V/A
- 5 Ω = 5 V/A
- 10 Ω = 10 V/A
Capacitance
- 1 µF = 10^-6 F
- 5 µF = 5 × 10^-6 F
- 10 µF = 10^-5 F
Inductance
- 1 mH = 10^-3 H
- 5 mH = 5 × 10^-3 H
- 10 mH = 10^-2 H
Frequency
- 50 Hz = 50 cycles/s
Power factor
- 0.5 = 50%
- 0.8 = 80%
- 1 = 100%
