Tag: introduction to heat

Questions Related to introduction to heat

The quantity of heat energy required to change the temperature of one gram of water by one degree Celsius is known as

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

  1. 1 joule

  2. 1 kilocalorie

  3. 1 calorie

  4. 1 ampere

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Correct Option: C
Explanation:

The amount of heat required to raise the temperature of one gram of water  through $ 1 ^{o}$ (from $14.5^{o}C$ to $15.5^{o}C$), is called one calorie.

One calorie is defined as

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

  1. The amount of heat energy required to raise the temperature of $1\ g$ water by $1^o\ C$

  2. The amount of heat energy required to raise the temperature of $1\ kg$ water by $1^o\ C$ 

  3. The amount of heat energy required to raise the temperature of $1\ g$ water by $1^o\ F$ 

  4. The amount of power required to raise the temperature of $1\ g$ water by $1^o\ C$ 

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Correct Option: A
Explanation:

The amount of heat energy required to raise the temperature of 1 g water by $1^o\ C$ is called one calorie.

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. $\dfrac { joule }{ second }$

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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 $

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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. $10^{10} ergs$

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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.