Current,Voltage, Resistance

Over the course of an 8 hour day, 3.8x10⁴ C of charge pass through a typical computer (presuming it is in use the entire time). Determine the current for such a computer.

• 1.32 A

• 4,750 A

• 304,000 A

• 3.12 A

The large window air conditioner in Anita Breeze's room draws 11 A of current. The unit runs for 8.0 hours during the course of a day. Determine the quantity of charge that passes through Anita's window AC during these 8.0 hours.

• 88 C

• 2,618 C

• 316,800 C

• 327 C

Determine the amount of time that the LED night light would have to be used before 1.0x10⁶ C of charge passes through them if the current is 0.0042 A.

• 4.2 x 10³ s

• 2.4 x 10⁸ s

• 3.6 x 10⁵ s

• 2.4 x10⁷

A power saw at the local hardware store boasts of having a motor that has 7.6x10⁴ C flowing through it in 3 hours. Find the current through the electric motor.

• 70 A

• 2.5 X 10⁴ A

• 422 A

• 7.0 A

A power saw at the local hardware store boasts of having a motor that has 7.6x10⁴ C flowing through it in 3 hours. Determine the electrical energy provided for 3 hours when plugged into a 110-Volt outlet.

• 8.36 x 10⁶ J

• 6.9 x 103 J

• 4.18 X 10⁶ J

• 2.8 X 10⁶ J

A coffee cup immersion heater utilizes a heating coil with a resistance of 8.5 Ω. Determine the current through the coil when operated at 110 V.

• 13 A

• 0.08 A

• 935 A

• 118.5 A

The potential difference (p.d.) across the device is 120V. How many joules of electrical energy are changed into light and heat when a charge of 1 X 10³ C passes through it

• 13 kJ

• 12 kJ

• 13 J

• 120 kJ

The potential difference (p.d.) across the lamp is 12V. How many joules of electrical energy are changed into light and heat when a current of 2 A flows through it for 10s.

• 240 J

• 240kJ

• 1.7 kJ

• 1.8 J

A resistor is connected to a power supply of 10 V. If the current passing through it is 0.5 A, what is it's resistance?

• 20 ohm

• 5 ohm

• 50 ohm

• 15 ohm

A lamp is connected to a 110 V power supply. How much charge flows through it if the energy dissipated is 1450 J?

• 13 mA

• 16 kA

• 0.08 A

• 13 A