ELECTRIC CURRENT

Which of the following statements defines the relationship of charge = current x time?

• The number of charges passing through a conductor and current is both equal.

• The higher the number of charges passing through a conductor, the lower the current.

• The lower the number of charges passing through a conductor, the higher the current.

• The higher the number of charges passing through a conductor, the higher the current.

When an electric current exists within a conducting wire, which of the following statements describes the condition of any accompanying electric field?

• must be zero

• must be parallel to current flow

• must be opposite to current flow

• must be perpendicular to current flow

The unit of electric current, ampere, is equivalent to which of the following?

• C/s

• V/s

• s/C

• s/V

In which terminal of a source does the flow of conventional current come from?

• negative

• positive

• either negative or positive

• neither negative nor positive

Which of the following types of electric current that flows in one direction only?

• alternating current

• direct current

• electron current

• steady current

Which of the following devices measures electric current?

• Ammeter

• Odometer

• Ohmmeter

• Voltmeter

Which of the following types of electric current that changes directions periodically?

• alternating current

• direct current

• electron current

• steady current

A wire carries a steady current of 0.1 A over a period of 20 s. What total charge passes through the wire in this time interval?

• 200 C

• 20 C

• 2 C

• 0.005 C

The current in a light bulb is 0.835 A. How long does it take for a total charge of 1.67 C to pass through the filament of the bulb?

• 0.5 s

• 0.84 s

• 2.0 s

• 2.5 s

Charges of 1800 C passes through a wire. How much electric current flows through it in one hour?

• 2.0 A

• 1.5 A

• 1.0 A

• 0.5 A