Tag: physics

Questions Related to physics

Parsec in the unit of which physical quantity?

physics measurements and experimentation measuring distance of celestial bodies unconventional units of measurements units of mass

  1. Time

  2. Distance

  3. Frequency

  4. Angular acceleration

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Correct Option: B
Explanation:

Parallactic second or parsec is a unit of distance defined as the distance at which one astronomical unit subtends an angle of one arcsecond, which is equal to 3.26 light years.

State whether the following statement is True or False. 

The prefix used for $\displaystyle { 10 }^{ 9 }$ is nano.

physics measurements and experimentation measuring distance of celestial bodies unconventional units of measurements units of mass

  1. True

  2. False

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Correct Option: B
Explanation:

The prefix used for $\displaystyle { 10 }^{ -9 }$ is nano and prefix used for $10^9$ is Giga

In CGS system, gram is the unit of mass. State true or false.

physics measurements and experimentation measuring distance of celestial bodies unconventional units of measurements units of mass

  1. True

  2. False

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Correct Option: A
Explanation:

Gram is the unit of mass in the CGS system

State whether the following statement is True or False. 

One micron is equal to $\displaystyle { 10 }^{ -3 }m$.

physics measurements and experimentation measuring distance of celestial bodies unconventional units of measurements units of mass

  1. True

  2. False

Show answer
Correct Option: B
Explanation:
We know that  $1 \mu m = 10^{-6} \ m$
Thus the given statement is false.

Which of the following is different from others?

physics measurements and experimentation measuring distance of celestial bodies unconventional units of measurements units of mass

  1. Micron

  2. Light year

  3. Mole

  4. Angstrom

Show answer
Correct Option: C
Explanation:

Micron, light year and Angstrom are the units of distance whereas mole is the measure of amount of substance in a matter. So, mole is different from others.

One angstrom is equal to _________ .

physics measurements and experimentation measuring distance of celestial bodies unconventional units of measurements units of mass

  1. $\displaystyle { 10 }^{ -12 }m$

  2. $\displaystyle { 10 }^{ -10 }m$

  3. the time taken by Neil Armstrong to reach the moon

  4. the distance travelled by Neil Armstrong on the surface of the moon

Show answer
Correct Option: B
Explanation:
Angstrom is a very small unit of distance.
$1 \ angstrom = 10^{-10} \ m$

Which of the following is not the unit of length ?

physics measurements and experimentation measuring distance of celestial bodies unconventional units of measurements units of mass

  1. Micron

  2. Light year

  3. Angstrom

  4. Radian

Show answer
Correct Option: D
Explanation:

Angstrom, Micron and light year are all units of length but radian is the unit of angle subtended.

Angstrom is a unit used to express

physics measurements and experimentation measuring distance of celestial bodies unconventional units of measurements units of mass

  1. length

  2. mass

  3. time

  4. none of these

Show answer
Correct Option: A
Explanation:
Angstrom is a unit to express length.
$1 \ A^o = 10^{-10} \ m$

Par sec is a unit of:

physics measurements and experimentation measuring distance of celestial bodies unconventional units of measurements units of mass

  1. angle

  2. velocity

  3. time

  4. distance

Show answer
Correct Option: D
Explanation:

The parsec is a unit of length used to measure the large distances to astronomical objects outside the Solar System. One parsec is approximately equal to 31 trillion kilometres or about 3.26 light-years. One parsec is the distance to an object whose parallax angle is one arcsecond.

1 quintal is equal to

physics measurements and experimentation measuring distance of celestial bodies unconventional units of measurements units of mass

  1. $\displaystyle \frac { 1 }{ 10 } $ kg

  2. 10 kg

  3. 100 kg

  4. 1000 kg

Show answer
Correct Option: C
Explanation:
Quintal is a unit of mass.
1 quintal $=$ 100 kg