Question

QUESTION 16

1. A battery has a 24.0 V "emf" but the terminal voltage is 22.0 V when the battery is connected to a 7.5 ohm resistor. Determine the internal resistance of the battery.

a. 1.2 ohm

b. 3.2 ohm

c. 0.68 ohm

d. 0.75 ohm

e. 0.27 ohm

QUESTION 17

1. A proton travels south and enters a region that contains a magnetic field. The proton feels a downward force toward Earth. Determine the direction of the magnetic field.

to. down (towards Earth)

b. West

c. This

d. South

e. North

QUESTION 18

1. A 30W bulb and a 60W bulb are supplied in series.

a. The two bulbs draw the same current.

b. The 30W bulb consumes a higher current than the 60W.

c. The 60W bulb consumes a higher current than the 30W.

d. None of the above.

QUESTION 19

1. To obtain an accurate measurement the resistance of a real voltmeter must be

a. infinite

b. None of the above

c. zero

d. as little as possible

e. as big as possible

QUESTION 20

1. Determine which of the following statements is true:

a. Magnetic field exerts force on a charge at rest

b. Magnetic field exerts force on both moving charge and resting charge

c. Magnetic field exerts force on a charge that moves parallel to the field

d. A magnetic field exerts force on a moving charge

Answer 1