Tag: physics

Questions Related to physics

1 volt is equivalent to:

physics measurement and effects of heat sources of heat introduction to heat measuring temperature

  1. $\dfrac { newton }{ second }$

  2. $\dfrac { newton }{ coulomb }$

  3. $\dfrac { joule }{ coulomb }$

  4. $\dfrac { joule }{ second }$

Show answer
Correct Option: C
Explanation:
Energy, $E=QV$
        $V=\dfrac{E}{R}$
$ \ 1 Volt=1 \ \dfrac{Joule}{Coulomb}$

Hence, option C is correct.

The temperature range in the definition of calorie is

physics measurement and effects of heat sources of heat introduction to heat measuring temperature

  1. $14.5^{o}C $ to $15.5^{o}C $

  2. $15.5^{o}C $ to $16.5^{o}C $

  3. $1^{o}C $ to $2^{o}C $

  4. $13.5^{o}C $ to $14.5^{o}C $

Show answer
Correct Option: A
Explanation:

According to the International Committee of Pure Physics, calorie is the standard unit to measure heat. The quantity of heat required to raise 1 gram of water from $14.5^o C \ to \ 15.5^o C$ is defined as a calorie.

1 Joule $=$

physics measurement and effects of heat sources of heat introduction to heat measuring temperature

  1. $10^8 ergs$

  2. $10^6 ergs$

  3. $10^7 ergs$

  4. $10^{10} ergs$

Show answer
Correct Option: C
Explanation:

We know,

$1 \ Joule = 10000000 \ ergs = 10^7 \ ergs$
Hence, option C is correct.

Out of the metal balls of same diameter one is solid and other is hollow. Both are heated to the same temperature at $300^{0}C$ and then allowed to cool in the same surroundings then rate of loss of heat will be:

physics measurement and effects of heat sources of heat introduction to heat measuring temperature

  1. More for hollow sphere

  2. More for solid sphere

  3. Same for both

  4. None of the above

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Correct Option: A

The amount of heat required to raise the temperature of 1 kilogram of water by $1:^oC$ is called :

physics measurement and effects of heat sources of heat introduction to heat measuring temperature

  1. Kilo-calorie

  2. calorie

  3. B. T. U

  4. $calorie/^oC$

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Correct Option: A
Explanation:

The amount of heat required to raise the temperature of 1 kilo gram of water by $1:^oC$ is called kilo calorie.

Which of the following voices is likely to have minimum frequency?

physics world of sounds sound produced by humans propagation of sound production and propagation of sound

  1. Baby girl

  2. Baby boy

  3. A man

  4. A woman

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Correct Option: C
Explanation:

A man’s sound is of the lower pitch as compared to the other options. And we know that pitch is directly proportional to the frequency of sound. So, the frequency of man’s voice will be the minimum among all the options.

The other name for larynx is

physics sound sound produced by humans propagation of sound production and propagation of sound

  1. voice processor

  2. voice modulator

  3. voice box

  4. voice generator

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Correct Option: C
Explanation:

Since the function of the larynx is to generate sound, its other name is voice box.

In humans, the sound is produced by:

physics sound sound produced by humans propagation of sound production and propagation of sound

  1. larynx

  2. wind pipe

  3. vocal cords

  4. lungs

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Correct Option: A
Explanation:

    Sound in human body  is produced by larynx , it is an organ in the neck which controls the pitch and volume of sound and also blocks food to go through trachea . 

We, humans, produce sound by using

physics sound sound produced by humans propagation of sound production and propagation of sound

  1. oesophagus

  2. larynx

  3. thyroid Gland

  4. mouth

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Correct Option: B
Explanation:

Larynx is known as the voice box. It is located at the upper end of the windpipe. The vocal cords stretch the larynx in such a way that a passage is created between them. When air passes through this passage the vocal cords vibrate and produce sound.

What is the name of the strings which vibrate in our voice box when we talk?

physics sound sound produced by humans propagation of sound production and propagation of sound

  1. Oesophagus

  2. Pharyngeal slits

  3. Vocal cords

  4. None of these

Show answer
Correct Option: C
Explanation:

When we talk, vibrations are produced in our vocal cord. When we touch our throat we can feel the vibrations.