Which of the following statement(s) about electromagnetic waves, sound waves and water waves is/are correct?<br>1. They exhibit reflection.<br>2. They carry energy.<br>3. They exert pressure.<br>4. They can travel in vacuum.

Which of the following statements about electromagnetic waves, sound waves and water waves is/are correct? 1) They exhibit reflection 2) They carry energy 3) They exert pressure 4) They can travel in vacuum Select the correct answer using the code given below:

A

1, 2 and 3

B

2 and 4

C

1 and 3 only

D

1 only

You are given a question and two statements. Idientify which of the statements is/are sufficient to answer the question. Question: In a city, some people travel to work by bus, some people travel to work by train, some people travel to work by both bus and train, and some travel to work neither by bus, nor by train. The number of people who travel to work by both bus and train is how much less than the number of people who travel to work by neither? Statements: (1) In the city, there are 384 people who travel to work by bus. (2) In the city, there are 672 people who travel to work by train,

A

Both statements together are sufficient to answer the question, but neither statement alone is sufficient.

B

Statements (1) and (2) together are not sufficient to answer the question.

C

Statement (2) alone is sufficient to answer the question, but statement (1) alone is not sufficient

D

Statement (1) alone is sufficient to answer the question, but statement (2) alone is not sufficient.

Which of the following statements are not true for sound ? (a) Sound waves are transverse waves. (b) Audible sound waves have frequency range of 20 kHz and above. (c) Sound waves require medium for propagation. (d) Non-periodic sound waves are termed as ‘Noise’.

A

(a) and (b)

B

(a) and (c)

C

(b) and (c)

D

(c) and (d)

Statement I Sound waves can travel through vacuum.
Statement II Light is an electromagnetic wave and can travel through vacuum.

A

Both the statements are true and statement II is the correct explanation of statement I

B

Both the statements are true, but statement II is not the correct explanation of statement I

C

Statement I is true, but statement II is false

D

Statement I is false, but statement II is true

In the following question, sentences of a paragraph have been jumbled and labelled as A, B, C and D. You are required to rearrange the jumbled sentences of the paragraph and mark your response accordingly by selecting the correct option. A: As the source continues to vibrate the medium, the vibrations propagate away from the source at the speed of sound, thus forming the sound wave. B: The sound source creates vibrations in the surrounding medium. C: The sound waves are generated by a sound source, such as the vibrating diaphragm of a stereo speaker. D: Sound can propagate through a medium such as air, water, and solids as longitudinal waves and also as a transverse wave in solids.

A

DCBA

B

DBCA

C

DABC

D

DCAB

Which of the following statements is/are correct? A) Sound waves are transverse waves. B) Audible sound waves have a frequency range of 20 kHz and above. C) Sound waves required a medium for propagation. D) Non-periodic sound waves are term as noise.

A

A and B

B

A and C

C

B and C

D

C and D

Which of the following statements is/are correct regarding the sound waves? 1) Sound waves cannot travel through a vacuum. 2) The particles oscillate up and down about their mean position as the wave travels. 3) In a given medium under the same physical conditions, the speed of sound changes drastically with a change in frequency. Select the correct answer using the code given below.

A

1 only

B

2 and 3 only

C

1 and 3 only

D

1, 2 and 3

Read the given statement and conclusions carefully and decide which of the conclusions logically follow(s) from the statement. Statement: Sound cannot travel in vacuum. Conclusions: I. We cannot hear sound of explosion in vacuum. II. We cannot hear sound of explosion in atmosphere

A

Only Conclusion I follows

B

Either conclusion I or conclusion II follows

C

Only Conclusions II follows

D

Neither conclusion I nor conclusion II follow

In the following question, two statements are numbered as A and B. On solving these statements we get quantities A and B respectively. Solve for the both quantities and choose the correct option. Quantity A: A boat takes 1 hr. 4 min. to travel from the shore to a pole and return back, when the speed of the stream is 4 km/hr. If the boat can travel at a speed of 16 km/hr in still water, find the distance between the shore and the pole. Quantity B: A boat takes 45 min. to travel ‘x’ km downstream and 1 hr. 30 min. to return back. If the boat can travel (x + 2) km in still water in 1 hr. 12 min., find the value of x.

A

Quantity A > Quantity B

B

Quantity A < Quantity B

C

Quantity A ≥ Quantity B

D

Quantity A ≤ Quantity B

E

Quantity A = Quantity B

If the sum of the total time taken by boats X1 to travel D km each upstream and X2 to travel downstream is 4 hours and the sum of the total time taken by boats X1 to travel downstream and X2 to travel upstream the same distance D km each is 12 hours. Time taken by X2 to travel upstream exceeds its downstream time by t1 hours. Similarly, the time taken by X1 to travel upstream exceeds its downstream time by t2 hours. What is the value of (t1 - t2)?

A

2

B

4

C

6

D

8

Which of the following statement(s) about electromagnetic waves, sound waves and water waves is/are correct?
1. They exhibit reflection.
2. They carry energy.
3. They exert pressure.
4. They can travel in vacuum.

Related Questions

Which of the following statement(s) about electromagnetic waves, sound waves and water waves is/are correct?1. They exhibit reflection.2. They carry energy.3. They exert pressure.4. They can travel in vacuum.

Related Questions

Which of the following statement(s) about electromagnetic waves, sound waves and water waves is/are correct?
1. They exhibit reflection.
2. They carry energy.
3. They exert pressure.
4. They can travel in vacuum.