QUESTION 1 Two bulbs are connected in series (shown above) as a branch of a larg

Question

QUESTION 1

Two bulbs are connected in series (shown above) as a branch of a larger circuit. Both bulbs are lit but one of the bulbs is bright (shown on the left) and the other is dim (shown on the right).  Which of the following statement is correct about the direction of current in the bulbs?

Since the bulb on the left is brighter the current must be coming from the left.

Since the bulb on the right is dimmer the current must be coming from the right.

If you break the circuit between the bulbs and see which bulb stays on, the current must be coming from that side.

If you place compasses around a vertical section of the wire and observe the orientation of the compass needles, you can determine the direction of the current.

[Without a commercial ammeter, the direction of the current cannot be determined.]

1 points   

QUESTION 2

Which of the following processes does NOT involve changing energy from one form to another.

Using electromagnetic induction to produce a current.

Using a battery to run a current through a light bulb.

Dropping a ball off a table.

Sunlight warming a sidewalk.

[ALL of the above involve changing energy to different forms.]

1 points   

QUESTION 3

How can you produce a current without using a battery?

Use heat to warm the wires.

Wrap a wire around a nail.

Move a magnet through a coil of wire.

[All of the above.]

[You can

A.

Since the bulb on the left is brighter the current must be coming from the left.

B.

Since the bulb on the right is dimmer the current must be coming from the right.

C.

If you break the circuit between the bulbs and see which bulb stays on, the current must be coming from that side.

D.

If you place compasses around a vertical section of the wire and observe the orientation of the compass needles, you can determine the direction of the current.

E.

[Without a commercial ammeter, the direction of the current cannot be determined.]

QUESTION 1 Two bulbs are connected in series (shown above) as a branch of a larger circuit. Both bulbs are lit but one of the bulbs is bright (shown on the left) and the other is dim (shown on the right). Which of the following statement is correct about the direction of current in the bulbs? A. Since the bulb on the left is brighter the current must be coming from the left. B. Since the bulb on the right is dimmer the current must be coming from the right. C. If you break the circuit between the bulbs and see which bulb stays on, the current must be coming from that side. D. If you place compasses around a vertical section of the wire and observe the orientation of the compass needles, you can determine the direction of the current. E. [Without a commercial ammeter, the direction of the current cannot be determined.] 1 points QUESTION 2 Which of the following processes does NOT involve changing energy from one form to another. A. Using electromagnetic induction to produce a current. B. Using a battery to run a current through a light bulb. C. Dropping a ball off a table. D. Sunlight warming a sidewalk. E. [ALL of the above involve changing energy to different forms.] 1 points QUESTION 3 How can you produce a current without using a battery? A. Use heat to warm the wires. B. Wrap a wire around a nail. C. Move a magnet through a coil of wire. D. [All of the above.] E. [You can?t produce current without a battery.] 1 points QUESTION 4 An object will only change its motion when A. it is acted on by an unbalanced force. B. it is acted on by balanced forces. C. it is experiencing gravity. D. it hits a wall. E. there are no forces.

Explanation / Answer

1. image not visible

2.E . [ALL of the above involve changing energy to different forms.]

3.C (electromagnetic induction )

4.A

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