Ch.8 Quiz #2

When more light bulbs are added to the above circuit, the current will

• increase.

• decrease.

• remain constant.

• become zero.

In the above circuit, what do arrows X and Y represent?

• A

• B

• C

• D

Which of the following statements about an electromagnet are correct?

(1) It works by making use of the heating effect of current.

(2) It works by making use of the magnetic effect of current.

(3) It acts like a magnet that can be switched on or off.

• (1) and (2) only

• (1) and (3) only

• (2) and (3) only

• (1), (2) and (3)

Which of the following statements about voltage is correct?

• Voltage measures the size of an electric current.

• When voltage increases, the current in a circuit does not change.

• Voltage measures how much energy is supplied to the free electrons by a source of electricity.

• Both voltmeter and ammeter can measure the voltage of an electric cell.

Which of the following is the circuit symbol of a resistor?

• A

• B

• C

• D

Which of the following symbols is the unit of resistance?

• A

• B

• C

• D

Rheostat can be used to

• adjust the voltage of the electric cells.

• measure the magnitude of voltage.

• adjust the current in a circuit.

• measure the magnitude of current.

The bulbs and cells in the circuits below are identical. Which bulb is the brightest?

• A

• B

• C

• D

When the switch is closed, the reading of A₁ is 3 A. Which of the following combinations is correct?

• A

• B

• C

• D

In the circuit below, if the current flowing through the resistor is 2 A, what is the reading of the ammeter?

• 0 A

• 1 A

• 2 A

• It cannot be determined.