Electricity：練習題

A student builds a simple circuit with a 1.5V battery and one bulb. If the student replaces the single 1.5V battery with two 1.5V batteries connected in series (facing the same direction), what change will they observe in the bulb?

A student builds a simple series circuit with one battery and one bulb. If the student adds a second battery in series with the first one, what will happen to the bulb?

A student constructs a circuit containing a 12V battery and three identical bulbs: Bulb 1, Bulb 2, and Bulb 3. Bulb 2 and Bulb 3 are connected in parallel with each other. This parallel pair is then connected in series with Bulb 1 and the battery. If the student measures the voltage across Bulb 1, what fraction of the battery's total voltage (12V) is being used by Bulb 1?

A student has a circuit with one battery, one bulb, and two open ends of wire. Which of the following items could be placed between the wire ends to complete the circuit and make the bulb light up?

In a simple series circuit, what happens to the remaining bulb if one bulb is removed and the gap is left open?

In a simple circuit, what is the function of a switch?

In the diagram provided, a student has set up a circuit with a battery, a switch, and two identical bulbs. The bulbs are connected in such a way that there are two separate paths for the current to flow. What is the name of this type of circuit, and if one bulb is unscrewed, will the other bulb remain lit?

In a parallel circuit with three branches, Branch A has one bulb, Branch B has two bulbs in series, and Branch C has one bulb. If the bulb in Branch A blows out, what happens to the bulbs in the other branches?

Electricity
A student builds a circuit with a battery, a switch, and a motor.
(a) What happens to the motor when the switch is moved from the 'open' position to the 'closed' position?
(b) The student replaces the copper wires with thick woollen string. Will the motor still work? Explain your answer using the terms conductor and insulator.

Electricity
Look at a simple series circuit containing a battery, a switch, and two light bulbs.
(a) What happens to the other bulb if one bulb breaks? Explain your answer.
(b) If you add a second battery to the circuit in the correct orientation, what will happen to the brightness of the bulbs?