Electric power is the rate at which electrical energy is consumed, generated, or transferred in an electrical circuit. It represents the amount of electrical energy delivered per unit time and is expressed in watts (W).

Quick facts about electric power

Electric power is widely used in electrical systems to measure how efficiently energy is converted into useful work.

Electric power formula: P = VI, I²R and V²/R explained

The formula for electric power is P = V × I, where V is voltage and I is current.

Using Ohm’s law (V = IR), electric power can also be expressed in different forms depending on the available values.

General formula

P = V \times I

Where:

• P = Power (watts, W)
• V = Voltage (volts, V)
• I = Current (amperes, A)

Using Ohm’s law

P = I^2 R

P = \frac{V^2}{R}

Where:

• R = Resistance (ohms, Ω)

All three formulas are equivalent and derived using Ohm’s law.

Units of electric power: Watt, Kilowatt, Megawatt and Horsepower

• Watt (W): Basic SI unit of electric power. 1 watt = 1 joule per second.
• Kilowatt (kW): 1 kW = 1,000 W. Commonly used for household appliances and electricity usage.
• Megawatt (MW): 1 MW = 1,000,000 W. Used in power generation and industrial applications.
• Horsepower (HP): 1 HP ≈ 746 W. Commonly used for motors and engines.
• Kilowatt-hour (kWh): Unit of electrical energy consumption over time.

Electric power calculation methods

Example calculation

If a 220 V appliance draws 5 A current:

P = 220 \times 5 = 1100,W

The appliance consumes 1,100 W of electric power.

Relationship between voltage, current, and power

The relationship between voltage, current, and power is interconnected through Ohm’s law and power equations.

Key points

1. Higher voltage reduces current for the same power, improving efficiency.
2. Power increases with both voltage and current.
3. Resistance affects the balance between voltage and current in a circuit.
4. Efficient electrical systems optimise voltage and current to minimise energy loss.

Electric power: Solved examples (Step-by-step)

Applications of electric power

Electric power is used across several sectors and industries:

1. Residential use: Lighting, cooling, heating, and household appliances.
2. Industrial applications: Machinery, manufacturing systems, and heavy equipment.
3. Transportation: Electric trains, metro systems, and electric vehicles.
4. Communication: Data centres, telecom systems, and broadcasting equipment.
5. Medical field: MRI machines, X-rays, ventilators, and healthcare equipment.

Electric power supports the smooth functioning of modern society and everyday life.

Importance of electricity payment online

Paying electricity bills online offers convenience, security, and faster transaction processing. Users can pay bills anytime without visiting physical payment centres.

Benefits include:

• Secure payment gateways
• Instant payment confirmation
• Reduced waiting time
• Easy bill management

You can use Bajaj Pay on Bajaj Finance for secure and convenient electricity bill payments.

    Steps for electricity bill payment online through Bajaj Finance platforms

On the Bajaj Finance app

1. Download the Bajaj Finance app from the Google Play Store or App Store and install it on your device  
2. Open the app, log in, or register if you are a new user  
3. Scroll down to the ‘Bills and recharges’ section and click on ‘Electricity’
4. Select/search for your electricity provider
5. Enter the requested details like Service/Consumer Number and City/Sub division code
6. Click on ‘PROCEED’, your total bill amount will be shown
7. Click on ‘PROCEED TO PAY’ and choose your preferred mode of payment
8. Once you have completed the transaction, you will get notified that the payment was successful

On the Bajaj Finance website

1. Go to the Bajaj Finance website
2. Scroll down to the ‘Bills and recharges’ section, click on 'Electricity’
3. Enter your mobile number and login with an OTP
4. Select/search for your electricity provider
5. Enter the requested details like Service/Consumer Number and City/Sub division code
6. Click on ‘PROCEED’,
7. Your total bill amount will be shown, click on ‘PROCEED TO PAY’ to choose your preferred mode of payment
8. Once you have completed the transaction, you will get notified that the payment was successful

How to pay broadband bill online on the Bajaj Finance platforms

On the Bajaj Finance App

1. Open the Bajaj Finance App on your phone
2. Go to ‘BILLS AND RECHARGE’ and select ‘BROADBAND’
3. Choose your broadband provider
4. Enter your user ID to fetch your bill
5. Select your payment method and confirm the transaction
6. You will receive an instant confirmation once the payment is successful

On the Bajaj Finance website

1. Open the Bajaj Finance website
2. Go to ‘BILLS AND RECHARGE’, click on ‘View all’ and select ‘BROADBAND’
3. Choose your broadband provider
4. Enter your user ID to fetch your bill
5. Select your payment method and confirm the transaction
6. You will receive an instant confirmation once the payment is successful