8th Grade > Physics
SOME NATURAL PHENOMENA MCQs
Total Questions : 58
| Page 3 of 6 pages
Answer: Option B. -> The balls get repelled from each other.
:
B
When the glass rod is rubbed with silk, it becomes charged. Now, when both the metal balls touchthe glass rod, both balls acquire the same kind of chargeas that of the glass rod. As we know that like charges repel each other, these two balls will repel each other.
:
B
When the glass rod is rubbed with silk, it becomes charged. Now, when both the metal balls touchthe glass rod, both balls acquire the same kind of chargeas that of the glass rod. As we know that like charges repel each other, these two balls will repel each other.
Answer: Option A. -> True
:
A
When woollen clothes are removed in the dark, a spark and a crackling sound is observed.Benjamin Franklin showed that the lightning and the spark from our clothes are essentially the same phenomena of the static electricity. In both cases, transfer of charges takes place which results in sparks.
:
A
When woollen clothes are removed in the dark, a spark and a crackling sound is observed.Benjamin Franklin showed that the lightning and the spark from our clothes are essentially the same phenomena of the static electricity. In both cases, transfer of charges takes place which results in sparks.
Answer: Option B. -> False
:
B
If the two balloons repel each other, it means that they have acquired the same kind of charge. We know that like charges repel each other and unlike charges attract each other. So, the two inflated balloons repel each other as they have like charges.
Hence, the given statement is false.
:
B
If the two balloons repel each other, it means that they have acquired the same kind of charge. We know that like charges repel each other and unlike charges attract each other. So, the two inflated balloons repel each other as they have like charges.
Hence, the given statement is false.
Answer: Option B. -> False
:
B
Richter scale is not linear. In fact, an increase of 2 in magnitude means 1000 times more destructive energy. For example, an earthquake of magnitude 6 has thousand times more destructive energy than an earthquake of magnitude 4.
:
B
Richter scale is not linear. In fact, an increase of 2 in magnitude means 1000 times more destructive energy. For example, an earthquake of magnitude 6 has thousand times more destructive energy than an earthquake of magnitude 4.
Answer: Option B. -> Negative
:
B
The charge acquired by a glass rod when it is rubbed with silk is positive.
Like charges repel and unlike charges attract. The straw gets attracted to the glass rod, which necessarily means that the plastic straw acquired negative charge.
:
B
The charge acquired by a glass rod when it is rubbed with silk is positive.
Like charges repel and unlike charges attract. The straw gets attracted to the glass rod, which necessarily means that the plastic straw acquired negative charge.
Answer: Option B. -> Installing lightning conductors
:
B
A lightning conductor is a device used to protect buildings from the effect of lightning. A metal rod is installed onthe roof of the building during its construction such that the upper tip of the rod is higher than the highest point of the building. This rod is connected to the ground with a conducting wire. The rod provides an easy route for the transfer of electric charge to the ground while bypassing the building.
:
B
A lightning conductor is a device used to protect buildings from the effect of lightning. A metal rod is installed onthe roof of the building during its construction such that the upper tip of the rod is higher than the highest point of the building. This rod is connected to the ground with a conducting wire. The rod provides an easy route for the transfer of electric charge to the ground while bypassing the building.
Answer: Option A. -> Richter
:
A
The power of an earthquake is expressed in terms of a magnitude on a scale calledRichter scale. It measures earthquakes with magnitudes ranging from 1 - 10. Destructive earthquakes have magnitudes higher than 7 on the Richter scale.
:
A
The power of an earthquake is expressed in terms of a magnitude on a scale calledRichter scale. It measures earthquakes with magnitudes ranging from 1 - 10. Destructive earthquakes have magnitudes higher than 7 on the Richter scale.
Answer: Option A. -> The attracted object must be oppositely charged.
:
A
When a charged object attracts the other object, it implies that the attracted object is oppositely charged. Attraction takes place between opposite charges i.e. like charges repel and opposite charges attracts each other.
:
A
When a charged object attracts the other object, it implies that the attracted object is oppositely charged. Attraction takes place between opposite charges i.e. like charges repel and opposite charges attracts each other.
Answer: Option A. ->
True
:
A
:
A
When woollen clothes are removed in the dark, a spark and a crackling sound is observed. Benjamin Franklin showed that the lightning and the spark from our clothes are essentially the same phenomena of the static electricity. In both cases, transfer of charges takes place which results in sparks.
Answer: Option B. ->
They acquired the opposite kind of charges.
:
B
:
B
When you rub one material to another, they are charged by friction, also like charges repel and unlike charges attract each other. In the above experiment, the balloon has acquired a kind of charge that is opposite to the charge acquired by the ballpen refill. As unlike charges attract each other, the balloon and the refill developed a force of attraction with each other, so they acquired opposite kind of charges.
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