Electrical Power and Cost of Electricity

A 5kW electric cooker is used for 55 minutes to cook. Calculate the cost of electrical energy used if the rate per unit is 50 sen.

• RM 0.23

• RM 230

• RM 2.30

• RM275

Tags

NGSS.HS-PS3-1

An electric heater is rated 230V, 10 A. Calculate the power of the electric heater in kW.

• 2300

• 23

• 2.3

• 0.23

Electrical power can be calculated using

• Resistance x Voltage
• Voltage x Current 
• Voltage ÷ Current

The S.I unit for Electrical Energy is

• kwh

• KWj

• kWh

• KWJ

What is the cost of the first 200 block of TNB tariff

• RM 436.

• RM 0.22

• RM 2.18

• RM 43.60

This is Lavinder's TV. What is the power rating of this TV?

• Toshiba

• 1000 W

• SMART TV 40

• RM 899.

Calculate the power of bulb X.

• 2 W

• 6 W

• 8 W

• 12 W

Tags

NGSS.HS-PS2-5

An oven rated 750 W, 220 V is switched on for 45 minutes. Calculate the cost of energy that is used by the oven if the cost per 1 unit is 30 sen?

• 3 sen

• 17 sen

• 16875 sen

• 4 sen

Tags

NGSS.HS-PS3-1

A 5kW electric cooker is used for 55 minutes to cook. Calculate the cost of electrical energy used if the rate per unit is 50 sen.

• RM 0.23

• RM 230

• RM 2.30

• RM275

Tags

NGSS.HS-PS3-1

A television rated 1.2 kW , 240 V is connected to a 240V electricity supply. Calculate curent that flows through the television.

• 5 A

• 2.5 A

• 0.005

• 1.0 A