Pre-UPS 2: C3 and C4 DP024

Which factor does NOT affect the resistance?

• Type of material

• Mass of the material

• Length of material

• Area of the material

The picture shows an electrical circuit. What is TRUE about the electrical circuit?

• The same current flows through all three light bulbs.

• The same voltage across through all three light bulbs.

• The current is divided between the three light bulbs.

• The voltage is divided between the three light bulbs.

The picture shows an electrical circuit. What is TRUE about the electrical circuit?

• The same current flows through all three light bulbs.

• The same voltage across through all three light bulbs.

• The current is divided between the three light bulbs.

• The voltage is divided between the three light bulbs.

In parallel circuit, if one of the light bulbs burns out, what will happen to the rest?

• The other bulbs will get dimmer.

• If one light goes out, they all go out.

• If one light goes out, it does not affect the others.

• The battery will become stronger.

In series circuit, if one of the light bulbs burns out, what will happen to the rest?

• The other bulbs will get dimmer.

• If one light goes out, they all go out.

• If one light goes out, it does not affect the others.

• The battery will become stronger

Two identical filament lamps P and Q, a switch S are connected to a battery as shown. With the switch S opened, both lamps will light up with normal brightness. Assume that the lamps do not fuse. When the switch S is closed,

• both lamps become brighter.

• both lamps become dimmer.

• P is brighter, but Q is dimmer.

• P is not lighted, but Q is brighter.

If the voltage is increased and the resistance stays the same, current will ……

• increase.

• decease.

• stay the same.

• changes.

If the voltage stays the same and the resistance is increased, current will ……

• increase.

• decrease.

• stay the same.

• changes.

According to Ohm’s law, if you were to triple the voltage of a circuit without changing the resistance, what would happen to the flow of current?

• It would stay the same.

• It would increase by 2x.

• It would increase by 3x.

• It would decrease by 3x.

According to Ohm’s law, if you were to double the voltage and double the resistance, what would happen to the flow of current?

• It would stay the same.

• It would increase by 2x.

• It would increase by 3x.

• It would decrease by 3x.