Heat and Thermodynamics| Practice MCQs Physics for Mdcat | mosaicbro.com

Heat and Thermodynamics| Practice MCQs Physics for Mdcat

7 of 106 questions (Page 8 of 16)

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50 The energy of molecular motion appears in the form of:
Correct Answer: D
Explanation: Molecular motion energy manifests as heat.
51 Ice becomes slippery when man walks on it because:
Correct Answer: B
Explanation: Pressure melting reduces friction, making ice slippery.
52 A thermometer made by bonding together two dissimilar metals having different thermal expansivity is called:
Correct Answer: D
Explanation: Bimetallic thermometers use two metals with different expansion rates.
53 Bimetallic thermometer is used:
Correct Answer: D
Explanation: Bimetallic thermometers have diverse applications.
54 The amount of heat needed to raise the temperature of body through $1 K^\circ$ is called:
Correct Answer: A
Explanation: Heat capacity is the heat required per unit temperature change.
55 The amount of heat energy required to raise temperature of $1 Kg$ of substance through $1 K$ is called:
Correct Answer: B
Explanation: Specific heat is heat per unit mass per Kelvin.
56 The relation between heat capacity and specific heat is:
Correct Answer: B
Explanation: Heat capacity = specific heat $\times$ mass.
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