DT 6TH Computer Science

In an electrical circuit, a battery is connected to a conductive wire. The conductive wire is connected to a lamp. What will happen if the conductive wire is disconnected from the battery? 

• The lamp will turn on.

• The lamp will turn off.

• Nothing will happen.

• The battery will be damaged.

A group of friends want to create an electrical circuit to turn on a lamp. They use a battery, a conductive wire, and a lamp. What material is the conductive wire? 

• An insulating material.

• A conductive material.

• A semiconductor material.

• A magnetic material.

In an electrical circuit, an electrical power generator is connected to a motor. The motor is connected to a load. What will happen if the resistance of the load is increased? 

• The motor will spin faster.

• The motor will spin slower.

• Nothing will happen.

• The generator will be damaged.

A student wants to create an electrical circuit to turn on an LED. They use a battery, a resistor, and an LED. What is the purpose of the resistor in the circuit? 

• To increase the electric current.

• To decrease the electric current.

• To increase the electric voltage.

• To decrease the electric voltage.

In an electrical circuit, a battery is connected to a switch. The switch is connected to a lamp. What will happen if the switch is activated? 

• The lamp will turn on.

• The lamp will turn off.

• Nothing will happen.

• The battery will be damaged.

A group of friends want to create an electrical circuit to turn on a motor. They use a battery, a conductive wire, and a motor. What type of circuit are they creating?

• A series circuit.

• A parallel circuit.

• A mixed circuit.

• An open circuit.

In an electrical circuit, an electrical power generator is connected to a series circuit. The series circuit is composed of three resistors. What will happen if the resistance of one of the resistors is increased? 

• The electric current in the circuit will increase.

• The electric current in the circuit will decrease.

• Nothing will happen.

• The generator will be damaged.

In an electrical circuit, a battery is connected to a parallel circuit. The parallel circuit is composed of three lamps. What will happen if one of the lamps is turned off? 

• The other lamps will turn off.

• The other lamps will remain on.

• Nothing will happen.

• The battery will be damaged.

A student is building a circuit with a battery, a switch, and an LED. They notice that the LED is very bright and might be damaged. What component should they add to the circuit to protect the LED? 

• Another battery.

• A larger switch. 

• A resistor.

• Another LED.

Imagine you have a flashlight with a battery and a bulb. When you turn on the flashlight, the battery sends an electric current that makes the bulb light up. Now, imagine that inside the flashlight there is a small obstacle that makes it difficult for this current to pass. If this obstacle gets bigger, what do you think will happen to the brightness of the bulb? 

• The bulb will keep shining just as bright.

• The bulb will shine less.

• The bulb will shine brighter.

• The battery will drain faster.