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 Directions for Assertion & Reason questions 
 
 These questions consist of two statements each, printed as Assertion and Reason. While answering these Questions you are required to choose any one of the following four responses. 
 A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion. 
 B. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion. 
 C. If Assertion is True but the Reason is False. 
 D. If both Assertion & Reason are false. 
 
1. Assertion : Light year and year, both measure time.
    Reason : Light year is the time taken by the light to reach the earth from the sun.
    (1) A
    (2) B
    (3) C
    (4) D
2. Assertion: All derived quantities may be represented dimensionally in terms of the base quantities.
    Reason : The dimension of a base quantity in other base quantities is always zero.
    (1) A
    (2) B
    (3) C
    (4) D
3. Assertion : If x and y are the distances along x and y axes respectively then the dimensions of
Reason: Dimensions of
    (1) A
    (2) B
    (3) C
    (4) D
 
4. Assertion : The equation y=2x + t cannot be true if x & y are distances and t is time.
    Reason : Quantities with different dimensions cannot be added.
    (1) A
    (2) B
    (3) C
    (4) D
5. Assertion : The unit vectors î, ĵ , and k have units of distance and dimensions   
 
    Reason: The product of a scalar and a vector is a new scalar.
    (1) A
    (2) B
    (3) C
    (4) D

 

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

For the circuit on the right, indicate whether the statements below are TRUE or FALSE.

If a statement is TRUE, briefly describe the evidence from this lab that supports this statement.

If a statement is FALSE, give a correct statement, and briefly describe the evidence.

 

 

a. The current flows from the battery, through wire A, through the bulb, and then back to the battery through wire B

b. Since the current is used up by the bulb, the current in wire B is smaller than the current in wire A

c. The current flows toward the bulb in both wires A and B

d. If wire B is disconnected, but wire A is left connected, the bulb will still light, but if wire A is disconnected and wire B is left connected, the bulb will not light. 

1. Is there any difference between the static charges generated by rubbing rods with fur or silk and the charges that flow (from a battery) through wires in an electric circuit? Give evidence for your answer.

2. For the circuit on the right, indicate whether the statements below are TRUE or FALSE. If a statement is TRUE, briefly describe the evidence from this lab that supports this statement. If a statement is FALSE, give a correct statement, and briefly describe the evidence from this lab that supports this new statement. 

a. The current flows from the battery, through wire A, through the bulb, and then back to the battery through wire B

b. Since the current is used up by the bulb, the current in wire B is smaller than the current in wire A

c. The current flows toward the bulb in both wires A and B

d. If wire B is disconnected, but wire A is left connected, the bulb will still light, but if wire A is disconnected and wire B is left connected, the bulb will not light.

e. A current sensor will read the same magnitude if connected to measure the current in wire A, and then connected to measure the current in wire B.

3. Name the circuit element represented by each of the following symbols: 

1)how is the polarization of an electromagnetic wave defined?

  a.none of these choices.

  b. the polarization is defined by the plane in which the magnetic field is oscillating.

  c. the polarization is defined by the direction the wave is traveling.

  d. the polarization is defined by the plane in which the electric field is oscillating.

 

2)In this lab you will be given two polaroid sheets with unlabeled transmission axes.  How can you tell, when looking through both polaroid sheets at the same time, if the transmission axes are crossed?

a.If the transmission axes are crossed, you will see one bright line when you look through the polaroid sheets.

b.If the transmission axes are crossed, it will be bright when you look through the polaroid sheets.

c.If the transmission axes are crossed, you will see a bright "+" shape when you look through the polaroid sheets.

d.If the transmission axes are crossed, it will be very dark when you look through the polaroid sheets.

 

3)In the polarizer + analyzer experiment you will want to start with the transmission axes of the polarizer and the analyzer aligned.  How will you know when the transmission axes are aligned?

a.The reading on the detector will be a maximum.

b.The reading on the detector will be a minimum.

c.The 0 degrees reading on the analyzer will be pointing up.

 

4)Suppose you are wearing polarized sunglasses and looking at a lake on a bright, sunny day.  What will happen if you rotate your polarized sunglasses by 90 degrees?

a.The lake will appear equally bright as before you rotated your sunglasses.

b.The lake will appear significantly brighter.

c.The lake will appear significantly darker.

 

5)Suppose you are looking at unpolarized light coming from an incandescent light bulb.  How much will the light intensity you observe be reduced if you look through a single polarizer?

a.50%

b.75%

c.100%

d.25%

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