Power 8th grade

Power 8th grade

Multiple Choice

Sultan can do 3600 J of work in 200 seconds. Calculate his power

• 3 W

• 9 W

• 18 W

• 36 W

Multiple Choice

A current of 2.0 A flows through a flashlight bulb when it is connected to 4.5 V. What is the power of this bulb?

• 3 W

• 6 W

• 9 W

• 12 W

Multiple Choice

A 2 A current flows through a 60 W lamp. What is the voltage across the lamp?

• 10 V

• 20 V

• 30 V

• 40 V

Multiple Choice

• 0.237 ohm

• 3.67 ohm

• 16.4 ohm

• 807 ohm

Multiple Choice

Calculate the power generated as a 20 A current flows through a 10Ω resistor?

• 2 W

• 200 W

• 4000 W

• 400 W

Multiple Choice

Calculate the electric power of an electrical appliance in which 10 A of current is flowing through a resistor of 2 ohms.
 
Remember: V=IR and P=VI

• 80 W
• 200 W
• 2.5 A
• 22.5 KJ

Multiple Choice

A cooker of 200 V has a power rating of 4 kW. How much current does it draw?

• 20 mA

• 2 A

• 0.2 mA

• 0.02 kA

Multiple Choice

How much energy, in kW•h, is consumed by a 100 W light bulb if it is left on for 15 min?

• 0.25

• 0.025

• 0.0025

• 0.00025

Multiple Choice

A toaster is used an average of 10.0 h a month. The toaster draws 8.0 A of current from a 200 V outlet. If electricity costs 20 tg per kW•h, how much will it cost to operate the toaster for one year?

• 920 tg

• 3840 tg

• 2920 tg

• 3920 tg