Sound Test

Result

Sound Test - 2

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Weekly Quiz Competition

Question 1
1 / -0

Fill in the blanks with the most appropriate option.

If a guitar string is pulled strongly, its amplitude of vibration ___(i)___ and the note heard is ___(ii)___. If it is pulled lightly, its amplitude of vibration ___(iii)___ and the note heard is ___(iv)___.

A

(i) (ii) (iii) (iv)

Increases Louder Increases Louder

B

(i) (ii) (iii) (iv)

Decreases Softer Decreases Softer

C

(i) (ii) (iii) (iv)

Increases Louder Decreases Softer

D

(i) (ii) (iii) (iv)

Decreases Softer Increases Louder
Question 2
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Directions For Questions

Directions: Read the given paragraph and answer the following questions.

Two metal rulers of lengths 30 cm and 60 cm are kept in such a manner that a 30 cm ruler extends about 15 cm over the edge and a 60 cm ruler extends about 30 cm over the edge. Both the ends are flicked.

...view full instructions

Which of the following statements is correct regarding this?

(i) The metal ruler of length 30 cm is able to vibrate slower.
(ii) The metal ruler of length 30 cm produces a high pitch sound.
(iii) The metal ruler of length 60 cm is able to vibrate faster.
(iv) The metal ruler of length 60 cm produces a low pitch sound.

A
Only (i) and (iii) are correct.

B
Only (ii) and (iv) are correct.

C
Only (i) and (iv) are correct.

D
Only (ii) and (iii) are correct.

Solution

A smaller length of the ruler vibrating i.e., 30 cm is able to vibrate faster. This increases the frequency of vibration. Hence the pitch of the sound produced is high. A larger length of the ruler vibrating produces a low pitch sound.
Question 3
1 / -0

Directions For Questions

Directions: Read the given paragraph and answer the following questions.

Two metal rulers of lengths 30 cm and 60 cm are kept in such a manner that a 30 cm ruler extends about 15 cm over the edge and a 60 cm ruler extends about 30 cm over the edge. Both the ends are flicked.

...view full instructions

Read the given statements and select the correct option.

Statement 1: The note heard in the vibration of 30 cm ruler is louder when flicked with larger amplitude.

Statement 2: Loudness of a sound depends on the amplitude of vibrations.

A
Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.

B
Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.

C
Statement 1 is true but statement 2 is false.

D
Statement 1 is false but statement 2 is true.
Question 4
1 / -0

In which of the following media can sound travel through?

(i) Glass of water
(ii) Balloon full of air
(iii) Iron bar
(iv) Vacuum

A
(i) and (ii)

B
(i) and (iii)

C
(i), (ii) and (iii)

D
All of these
Question 5
1 / -0

There are two bottles of glass, one bottle is two third filled with water and another bottle is filled one third with water. When we blow across the mouth of each bottle, then

(i) The bottle with the less air in it gives the note of higher pitch
(ii) The shorter the air column, the higher the pitch of the note produced.

A
Both (i) and (ii) are correct and (ii) is the correct explanation of (i).

B
Both (i) and (ii) are correct but (ii) is not the correct explanation of (i).

C
Only (i) is correct.

D
Only (ii) is correct.

Solution

Most wind instruments work on the principle that shorter the air column, the higher the pitch of the note produced.
Question 6
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Consider the following statements and select the correct option which correctly identifies true (T) and false (F).

(i) Short string produces notes of low pitch.
(ii) Thin string produces notes of high pitch
(iii) Tightly stretched string produces notes of low pitch.

A

(i) (ii) (iii)

T F T

B

(i) (ii) (iii)

T T F

C

(i) (ii) (iii)

T T F

D

(i) (ii) (iii)

F T F

Solution

Short, thin and tightly stretched strings produces notes of high pitch.
Question 7
1 / -0

Read the given statements and select the correct option.

Statement 1: When Ravi saw a film on space wars, he didn't hear any explosions.

Statement 2: Sound travels slowest through gases.

A
Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.

B
Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.

C
Statement 1 is true but statement 2 is false.

D
Statement 1 is false but statement 2 is true.

Solution

In a film on space wars, the sound of explosion would not be heard because sound does not travel in vacuum. It needs a medium to travel, which can be solid, liquid or gas. The speed of sound is maximum in solids and minimum in gases.

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Re-Attempt Weekly Quiz Competition

(i)	(ii)	(iii)	(iv)
Increases	Louder	Increases	Louder

(i)	(ii)	(iii)	(iv)
Decreases	Softer	Decreases	Softer

(i)	(ii)	(iii)	(iv)
Increases	Louder	Decreases	Softer

(i)	(ii)	(iii)	(iv)
Decreases	Softer	Increases	Louder

Sound Test - 2

Result

Sound Test - 2

Score

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Rank

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SHARING IS CARING

Question 1

(i) (ii) (iii) (iv) Increases Louder Increases Louder

(i) (ii) (iii) (iv) Decreases Softer Decreases Softer

(i) (ii) (iii) (iv) Increases Louder Decreases Softer

(i) (ii) (iii) (iv) Decreases Softer Increases Louder

Question 2

Only (i) and (iii) are correct.

Only (ii) and (iv) are correct.

Only (i) and (iv) are correct.

Only (ii) and (iii) are correct.

Solution

Question 3

Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.

Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.

Statement 1 is true but statement 2 is false.

Statement 1 is false but statement 2 is true.

Question 4

(i) and (ii)

(i) and (iii)

(i), (ii) and (iii)

All of these

Question 5

Both (i) and (ii) are correct and (ii) is the correct explanation of (i).

Both (i) and (ii) are correct but (ii) is not the correct explanation of (i).

Only (i) is correct.

Only (ii) is correct.

Solution

Question 6

(i) (ii) (iii) T F T

(i) (ii) (iii) T T F

(i) (ii) (iii) T T F

(i) (ii) (iii) F T F

Solution

Question 7

Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.

Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.

Statement 1 is true but statement 2 is false.

Statement 1 is false but statement 2 is true.

Solution

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(i) (ii) (iii) (iv)

Increases Louder Increases Louder

(i) (ii) (iii) (iv)

Decreases Softer Decreases Softer

(i) (ii) (iii) (iv)

Increases Louder Decreases Softer

(i) (ii) (iii) (iv)

Decreases Softer Increases Louder

(i) (ii) (iii)

T F T

(i) (ii) (iii)

T T F

(i) (ii) (iii)

T T F

(i) (ii) (iii)

F T F