which of the following is an example of static electricity? And Why?
A. A light switch that is turned on runs a ceiling fan.
B. A magnet sticks to a fridge door made of metal.
C. A dry cell battery connected to wires lights up a light bulb.
D. A balloon sticks to a wall after it is rubbed with a piece of wool
D. A balloon sticks to a wall after it is rubbed with a piece of wool.
This is an example of static electricity because when the balloon is rubbed against the wool, electrons from the wool are transferred to the balloon, leaving the balloon with a negative charge. The negatively charged balloon is then attracted to the positively charged wall, causing it to stick.
The correct answer is D. A balloon sticking to a wall after it is rubbed with a piece of wool is an example of static electricity.
Static electricity occurs when there is an imbalance of electric charges on the surface of objects. When the balloon is rubbed with a piece of wool, it causes the transfer of electrons between the two objects. This means that the balloon gains extra electrons and becomes negatively charged, while the wool loses some electrons and becomes positively charged.
The balloon and the wall have opposite charges, so they are attracted to each other. This attraction causes the balloon to stick to the wall temporarily due to the static electricity.
To determine the correct answer, it's important to understand what static electricity is and its characteristics. By knowing that static electricity involves the transfer of electric charges and the attraction between objects with opposite charges, we can see that the scenario described in option D best fits this definition.
The correct answer is D. A balloon sticks to a wall after it is rubbed with a piece of wool.
This is an example of static electricity because when the balloon is rubbed with wool, the friction between the two materials causes the transfer of electrons. The balloon becomes negatively charged while the wool gains a positive charge. The negatively charged balloon is then attracted to the positively charged wall, resulting in the balloon sticking to the wall.