Understanding Electric Energy Consumption

What is the primary unit of measurement for electrical energy consumption?

• Joule

• Kilowatt-hour (kWh)

• Watt

• Ampere

Which of the following devices typically consumes the most electrical energy in a household?

• LED light bulb

• Refrigerator

• Electric kettle

• Smartphone charger

If an appliance has a power rating of 1500 watts and is used for 3 hours, how much energy does it consume in kilowatt-hours?

• 1.5 kWh

• 3 kWh

• 4.5 kWh

• 6 kWh

Which of the following is a common method to reduce electricity bills?

• Increasing the use of incandescent bulbs

• Using energy-efficient appliances

• Running appliances during peak hours

• Keeping devices on standby mode

What is the formula to calculate the cost of electricity consumption?

• Cost = Power (kW) × Time (h)

• Cost = Energy (kWh) × Price per kWh

• Cost = Voltage (V) × Current (A)

• Cost = Resistance (Ω) × Current (A)

Which of the following is NOT an electrical appliance?

• Microwave oven

• Gas stove

• Washing machine

• Air conditioner

What is the effect of using a smart meter in households?

• Increases energy consumption

• Provides real-time energy usage data

• Decreases the efficiency of appliances

• Increases the cost of electricity

If a household receives a 10% discount on their electricity bill, and the original bill was $200, what is the new bill amount?

• $180

• $190

• $195

• $200