S Chand Class 10 Physics Electricity Solutions. We covered all the S Chand Class 10 Physics Electricity Solutions in this post for free so that you can practice well for the exam.
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S Chand Class 10 Physics Electricity MCQs for Students
In thermocouples, current flow due to
(A) Protons
(B) Electrons
(C) +ve ions
(D) -ve ions
Option b – Electrons
If the temperature of the hot junction is increased by keeping the cold junction at the same temperature, thermoemf :
(A) Always increases
(B) Always decreases
(C) May increases or decrease
(D) Always remains constant
Option c – May increases or decrease
At inversion temperature, emf across thermocouple becomes :
(A) Maximum
(B) Minimum
(C) Zero
(D) Maximum and then decreases
Option c – Zero
Using a thermocouple :
(A) Electrical energy is converted into heat energy
(B) Heat energy is converted into electrical energy
(C) Chemical energy is converted into electric energy
(D) Electrical energy is converted into chemical energy
Thermocouples cannot be used as
(A) Thermometer
(B) Voltmeter
(C) Refrigerator
(D) A. C. power generator
Option d – A. C. power generator
If the temperature of the cold junction is kept constant and the temperature of the hot junction is continuously increased then :
(A) Thermo emf increases continuously
(B) Thermo emf decreases continuously
(C) Thermo emf first increases and then decreases
(D) Change in emf depends upon the metal pair used in the thermocouple
Option c – Thermo emf first increases and then decreases
At neutral temperature, emf across thermo couple becomes :
(A) Maximum
(B) Minimum
(C) Zero
(D) Zero and then increases
Option a – Maximum
Neutral temperature is the temperature of the hot junction at which :
(A) Thermo emf is minimum
(B) Thermo emf is maximum
(C) Thermo emf changes its direction
(D) Seebeck effect is observed
Option b – Thermo emf is maximum
The neutral temperature of the thermocouple is dependent upon :
(A) the Metals used in the thermocouple
(B) the Temperature of the cold junction
(C) the Temperature of the hot junction
(D) the Inversion temperature
Option a – the Metals used in the thermocouple
The inversion temperature of the thermocouple depends upon
(A) Neutral temperature
(B) the Temperature of the cold junction and material used in the thermocouple
(C) Experimental arrangement
(D) the Temperature of the surrounding air
Option b – the Temperature of the cold junction and material used in the thermocouple
Which thermocouple form the following will produce maximum thermo emf if the junctions are kept at the same temperature difference? :
(A) Copper – bismuth
(B) Antimony – bismuth
(C) Iron-nickel
(D) Copper – iron
Option b – Antimony – bismuth
When the number of thermocouples is joined in series the net thermo emf :
(A) Is decreased
(B) Is increased
(C) Becomes zero
(D) Remains the same
Option b – Is increased
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