Electrical Power and Time Calculations

If a light bulb is switched on for 20 s and it consumes 2400 J of electrical energy then it's power is

• 120W

• 170W

• 150W

• 100W

Tags

NGSS.HS-PS3-3

What will be the current drawn by an electric bulb of 1000 W when it is connected to a source of 220 V?

• 4.55A

• 6.72A

• 3.29A

• 9.1A

Standard unit for Power

• Ampere

• Newton

• Joule

• Watt

The current in a small torch bulb is 0.20 A. What is the total electric charge which passes a point in the circuit in 12 min?

• 144C

• 114.4C

• 14.4C

• 1.44C

Calculate the Charge passing a point in the wire in 1 min when the current is: 5 nA?

• 3 x 10^-7C

• 3 x 10^-9C

• 3 x 10^-11C

• 3 x 10^-5C