Some Natural Phenomena Test

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Some Natural Phenomena Test - 25

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Weekly Quiz Competition

Question 1
1 / -0

Earthquake at two places A and B were measured by a seismograph which recorded the magnitude as 4 and 6. The magnitude of tremors and its destructive energy at A and B can be compared as under:

A
Tremor at B is 2 times to that at place A

B
Tremor at B is 4 times to that at place A

C
Tremor at B is 100 times to that at place A

D
Tremor at B is 1000 times to that at place A

Solution

Richter scale is not a linear scale. It is a logarithmic scale. A difference in magnitude of $$2$$ implies a multiplication factor of $$10^2 = 100$$.
Question 2
1 / -0

Lightning conductor installed in a building:

A
does not allow the lightning to fall on the building

B
repels the lightning

C
forces the lightning to fall in an area where there are no buildings

D
conducts electric charge to the ground when lightning strikes the building

Solution

Lightning conductor is installed in a building so that when a lightning strikes the building it goes to the conductor and the conductor will conduct this electric charge due to lightning to the ground and the building will be safe.
Question 3
1 / -0

An ebonite rod is rubbed with fur. What will be the charge on the ebonite rod?

A
Negative

B
Positive

C
Neutral

D
Can't say

Solution

On rubbing the ebonite rod with fur, electrons move from fur to the ebonite rod. The electrons in fur are less tightly bound than electrons in ebonite and hence ebonite gets a negative charge. The charge on the ebonite rod is negative and the charge on the fur is positive.
Question 4
1 / -0

An ebonite rod is rubbed with fur. What is the charge on the fur?

A
Positive

B
Negative

C
Neutral

D
None of these

Solution

Explain the charging of the ebonite rod and the fur on the basis of electron movement. Solution: When an ebonite rod is rubbed with fur, fur loses electrons and the ebonite rod gains electrons. fur becomes positively charged and rod becomes negatively charged.
Question 5
1 / -0

The seismic zones are those areas which are less prone to earthquakes.

A
True

B
False

C
Ambigious

D
Data insufficient

Solution

Earthquakes are caused by the movement of plates, the boundaries of the plates are the weak zones where earthquakes are more likely to occur. The weak zones are also known as seismic or fault zones.
Question 6
1 / -0

The amplitude of vibrations measured on the Richter's scale increase by steps of about

A
10

B
20

C
30

D
40

Solution

Answer is A.

The amplitude of vibrations measured on the Richter's scale increase by steps of about 10.
The Richter magnitude scale was developed in 1935 by Charles F. Richter of the California Institute of Technology as a mathematical device to compare the size of earthquakes. The magnitude of an earthquake is determined from the logarithm of the amplitude of waves recorded by seismographs. Adjustments are included in the magnitude formula to compensate for the variation in the distance between the various seismographs and the epicenter of the earthquakes. On the Richter Scale, magnitude is expressed in whole numbers and decimal fractions. For example, a magnitude of 5.3 might be computed for a moderate earthquake, and a strong earthquake might be rated as magnitude 6.3. Because of the logarithmic basis of the scale, each whole-number increase in magnitude represents a tenfold increase in measured amplitude; as an estimate of energy, each whole number step in the magnitude scale corresponds to the release of about 31 times more energy than the amount associated with the preceding whole number value.
Question 7
1 / -0

Earthquakes are measured on

A
Ruler

B
Barometer

C
Richter scale

D
All of these

E
None of these

Solution

The magnitude of intensity of earthquakes are measured on Richter scale.
Question 8
1 / -0

The first seismograph was invented in

A
Germany by Albert Einstein.

B
China by Zhang Heng.

C
Germany by Emmy Noether.

D
None of the above.

Solution

A Chinese mathematician, named Zhang Heng, invented and constructed the first seismograph in A.D. 132.
Question 9
1 / -0

In 1752, scientist Benjamin Franklin showed that lightning and sparks from our clothes are ______ phenomena.

A
Same

B
Different

C
Related

D
None of these

Solution

In 1752, Benjamin Franklin discovered and showed that sparks produced from our clothes and lighting are essentially the same phenomena. Both lightning and sparks are caused by the accumulation of charges in the clouds and clothes respectively.
Question 10
1 / -0

The air in the path of lightning goes up to a temperature of about

A
$$300^oC$$

B
$$3000^oC$$

C
$$300000^oC$$

D
$$30000^oC$$

Solution

Answer is D.

The air in the path of lightning goes up to a temperature of about 30,000 degrees C.
Thunder is caused by lightning. The bright light of the lightning flash caused by the return stroke represents a great deal of energy. This energy heats the air in the channel to above 30,000 degrees C in only a few millionths of a second. The air that is now heated to such a high temperature had no time to expand, so it is now at very high pressure. The high-pressure air then expands outward into the surrounding air compressing it and causing a disturbance that propagates in all directions away from the stroke. The disturbance is a shock wave for the first 10 yards, after which it becomes an ordinary sound wave or thunder. Thunder can seem like it goes on and on because each point along the channel produces a shock wave and sound wave.

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Some Natural Phenomena Test - 25

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Some Natural Phenomena Test - 25

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SHARING IS CARING

Question 1

Tremor at B is 2 times to that at place A

Tremor at B is 4 times to that at place A

Tremor at B is 100 times to that at place A

Tremor at B is 1000 times to that at place A

Solution

Question 2

does not allow the lightning to fall on the building

repels the lightning

forces the lightning to fall in an area where there are no buildings

conducts electric charge to the ground when lightning strikes the building

Solution

Question 3

Negative

Positive

Neutral

Can't say

Solution

Question 4

Positive

Negative

Neutral

None of these

Solution

Question 5

True

False

Ambigious

Data insufficient

Solution

Question 6

10

20

30

40

Solution

Question 7

Ruler

Barometer

Richter scale

All of these

None of these

Solution

Question 8

Germany by Albert Einstein.

China by Zhang Heng.

Germany by Emmy Noether.

None of the above.

Solution

Question 9

Same

Different

Related

None of these

Solution

Question 10

$$300^oC$$

$$3000^oC$$

$$300000^oC$$

$$30000^oC$$

Solution

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