Tag: physics

Questions Related to physics

Carbon dating is

physics nuclear physics hazards and safety measures of radiations harmful effects and safety precautions for radiations energy production

  1. a process to determine the age of archaeological samples

  2. a medicine for treatment of cancer

  3. a process to determine the age of a meteorite

  4. a process of treatment of diseases in animals

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Correct Option: A
Explanation:
Carbon dating is a method for determining the age of an object containing organic material by using the properties of radiocarbon (${}^{14}C$), a radioactive isotope of carbon. 

Match the following :

Radio isotope Cures disease
i) Radio sodium a) Thyroid gland
ii) Radio phosphorus b) Cancer
iii) Radio cobalt circulation c) Blocks in blood
iv) Radio iodine d) Leukamia
physics nuclear physics hazards and safety measures of radiations harmful effects and safety precautions for radiations energy production

  1. i-c, ii-b, iii-a, iv-d

  2. i-a, ii-c, iii-b,iv-d

  3. i-c, ii-d, iii-b, iv-a

  4. i-d, ii-b, iii-c, iv-a

Show answer
Correct Option: C
Explanation:

Thyroid disease is cured using - Radio Iodine
Cancer - Radioactive Cobalt circulation (Chemo)
Blocks in blood - Radio Sodium
Leukemia - Radio Phosphorus
Hence option C is correct.

Fill in the blank.

Radioactive contamination can enter the body through ____________.

physics nuclear physics hazards and safety measures of radiations harmful effects and safety precautions for radiations energy production

  1. inhalation

  2. ingestion

  3. absorption 

  4. all of the above

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Correct Option: D
Explanation:

D

Radioactive contamination can enter into the body through inhalation, ingestion and absorption. It causes serious biological effects to our body. Radioactive waves are capable to enter the body directly through penetration. It can also be inhaled or ingested. 

The rad is the correct unit used to report the measurement of 

physics nuclear physics hazards and safety measures of radiations harmful effects and safety precautions for radiations energy production

  1. the rate of decay of radioactive source

  2. the ability of a beam of gamma ray photons to produce ions in a target

  3. the energy delivered by radiation to a target.

  4. the biological effect of radiation

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Correct Option: D
Explanation:

Rad is the unit of absorbed dose of ionizing radiation. One rad is equal approximately to the absorbed dose delivered when soft tissue is exposed to one-roentgen of medium-voltage radiation.  Thus this is the bilogical effect of radiation. 

Radiation exposure comes from

physics nuclear physics hazards and safety measures of radiations harmful effects and safety precautions for radiations energy production

  1. Background Sources

  2. Manmade sources

  3. Medical processes

  4. All of the above

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Correct Option: D
Explanation:

Because of Man made processes , there will be radiation exposure. For example we can take bricks , it causes radiation

Because of Medical processes , we will get several radiation exposures . For example X ray radiation etc
Background sources also causes radiation
Therefore option $D$ is correct

The effective area of a black body is 0.1 $m^2$ and its temperature is 1000 K. The amount of radiations emitted by it per min is -

physics nuclear physics hazards and safety measures of radiations harmful effects and safety precautions for radiations energy production

  1. 1.34 k-cal

  2. 81 k-cal

  3. 5.63 k-cal

  4. 1.34 k-J.

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Correct Option: B
Explanation:

$\begin{array}{l} \dfrac { { d\emptyset  } }{ { dt } } =A6T{ Y^{ 4 } } \ =81\, \, kcal \end{array}$

The motion of an ant on a floor along the edges is an example of translatory motion.

physics kinematics different types of motion basics of motion motion and reference point

  1. True

  2. False

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Correct Option: A
Explanation:

The given statement is true that the motion of an ant on the floor along the edges is an example of translatory motion.

Smoke particles from a chimney exhibit :

physics kinematics different types of motion basics of motion motion and reference point

  1. Random or irregular motion

  2. Circular motion only

  3. Linear motion only

  4. Rotational motion only

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Correct Option: A
Explanation:

Smoke particles from the chimney have velocities in different direction and thus they exhibit random or irregular motion.

Name the type : A flying insect

physics kinematics different types of motion basics of motion motion and reference point

  1. Random motion (Irregular motion)

  2. Circular motion

  3. Rolling motion

  4. Purely translation motion 

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Correct Option: A
Explanation:

A flying insect is an example of random motion (irregular motion).

Rectilinear motion is a motion that occurs in :

physics kinematics different types of motion basics of motion motion and reference point

  1. Straight line

  2. Plane

  3. Both A and B

  4. None

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Correct Option: A
Explanation:

The rectilinear motion is a straight line motion or one dimensional motion.