Monday, September 7, 2026

ITI Exam

आईटीआई परीक्षा की बेहतर तैयारी

ITI Exam

आईटीआई परीक्षा की बेहतर तैयारी

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Electric Power, Formula aur Calculation

ITI Electrician Electric Power, Formula aur Calculation: Complete Guide in Hindi

ITI Electrician Electric Power, Formula aur Calculation: Complete Guide in Hindi

Bharat Skills aur NIMI NCVT syllabus ke mutabiq, ITI Electrician 1st Year ke liye **Electric Power (विद्युत शक्ति)** ek behad mahatvapurna topic hai. Kisi electrical circuit me energy kis dar se kharch ho rahi hai, ise power kehte hain.

Gharon ke electric bills calculate karne se lekar motors ki rating tay karne tak power formulas ka prayog hota hai. Aayiye iske baare me विस्तार se samajhte hain.

1. Electric Power Kya Hai? (Definition)

Kisi electrical circuit me prati second kharch hone wali ya convert hone wali electrical energy ko **Electric Power** kehte hain.

$$P = V \times I \quad \text{ya} \quad P = I^2 R \quad \text{ya} \quad P = \frac{V^2}{R}$$

Jahan: P = Power (Watts), V = Voltage (Volts), I = Current (Amperes), R = Resistance (Ohms). Iska SI unit **Watt (W)** ya **Kilowatt (kW)** hota hai.

2. Power ke Mukhya Roop (Key Points)

Horsepower (HP)

Mechanical power ko naapne ke liye Horsepower ka use hota hai. 1 Metric HP = 735.5 Watts aur 1 British HP = 746 Watts hota hai.

Electrical Energy (kWh)

Ghar ka bijli bill kilowatt-hour (kWh) yaani **Unit** me aata hai. 1 Unit = 1 kWh = 1000 Watt-hours.

3. Electric Energy aur Power me Antar

  • Power (P): Ye kaam karne ki dar (rate of doing work) hai. Iska unit Watt hai.
  • Energy (E): Ye total ki gayi khapat hai. Formula: \(E = P \times t\) (Power $\times$ Time). Iska unit kWh (Unit) hai.

4. Unit Calculation Example

Yadi 100 Watt ka ek bulb rozana 5 ghante chalta hai, toh 30 dino me kitni units (kWh) bijli kharch hogi?

  • Total Watts = $100 \times 5 \text{ hours} = 500 \text{ Wh per day}$
  • 30 dino ke liye = $500 \times 30 = 15,000 \text{ Wh} = 15 \text{ kWh (Units)}$
ITI CBT Exam Important Question: 1 Horsepower (British HP) ki value watts me kitni hoti hai? Iska sahi jawab **746 Watts** hota hai, jabki Metric HP ki value 735.5 Watts hoti hai.