Current Electricity Test

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Current Electricity Test - 161

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Weekly Quiz Competition

Question 1
4 / -1

When a current of 1 ampere is passed through a conductor whose ends are maintained at temperature difference of 1°C, the amount of heat evolved or absorbed is called

A
Peltier coefficient

B
Thomson coefficient

C
Thermoelectric power

D
Thermo e.m.f.

Solution
Question 2
4 / -1

In a thermocouple, the temperature that does not depend on the temperature of the cold junction is called

A
Neutral temperature

B
Temperature of inversion

C
Both the above

D
None of the above
Question 3
4 / -1

In Cu-Fe couple, the flow of current at the temperature of inversion is

A
From Fe to Cu through the hot junction

B
From Cu to Fe through the hot junction

C
Maximum

D
None of the above
Question 4
4 / -1

In Seebeck series Sb appears before Bi. In a Sb-Bi thermocouple current flows from

A
Sb to Bi at the hot junction

B
Sb to Bi at the cold junction

C
Bi to Sb at the cold junction

D
None of the above
Question 5
4 / -1

Which of the following statement is correct

A
Both Peltier and Joule effects are reversible

B
Both Peltier and Joule effects are irreversible

C
Joule effect is reversible, whereas Peltier effect is irreversible

D
Joule effect is irreversible, whereas Peltier effect is reversible
Question 6
4 / -1

For a given temperature difference, which of the following pairs will generate maximum thermo e.m.f.

A
Antimony-bismuth

B
Silver-gold

C
Iron-copper

D
Lead-nickel
Question 7
4 / -1

The cold junction of a thermocouple is maintained at 10° C. No thermo e.m.f. is developed when the hot junction is maintained at 530°C. The neutral temperature is

A
260° C

B
270° C

C
265° C

D
520° C

Solution
Question 8
4 / -1

Neutral temperature of a thermocouple is defined as the temperature at which

A
The thermo e.m.f. changes sign

B
The thermo e.m.f. is maximum

C
The thermo e.m.f. is minimum

D
The thermo e.m.f. is zero
Question 9
4 / -1

As the temperature of hot junction of a thermo-couple is increased (while cold junction is at constant temperature), the thermo e.m.f.

A
Increases uniformly at constant rate

B
Increases slowly in the beginning and more rapidly at higher temperatures

C
Increases more rapidly in the beginning but less rapidly at higher temperatures

D
Is minimum at neutral temperature
Question 10
4 / -1

As the temperature of hot junction increases, the thermo e.m.f.

A
Always increases

B
Always decreases

C
May increase or decrease

D
Always remains constant

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Current Electricity Test - 161

Result

Current Electricity Test - 161

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SHARING IS CARING

Question 1

Peltier coefficient

Thomson coefficient

Thermoelectric power

Thermo e.m.f.

Solution

Question 2

Neutral temperature

Temperature of inversion

Both the above

None of the above

Question 3

From Fe to Cu through the hot junction

From Cu to Fe through the hot junction

Maximum

None of the above

Question 4

Sb to Bi at the hot junction

Sb to Bi at the cold junction

Bi to Sb at the cold junction

None of the above

Question 5

Both Peltier and Joule effects are reversible

Both Peltier and Joule effects are irreversible

Joule effect is reversible, whereas Peltier effect is irreversible

Joule effect is irreversible, whereas Peltier effect is reversible

Question 6

Antimony-bismuth

Silver-gold

Iron-copper

Lead-nickel

Question 7

260° C

270° C

265° C

520° C

Solution

Question 8

The thermo e.m.f. changes sign

The thermo e.m.f. is maximum

The thermo e.m.f. is minimum

The thermo e.m.f. is zero

Question 9

Increases uniformly at constant rate

Increases slowly in the beginning and more rapidly at higher temperatures

Increases more rapidly in the beginning but less rapidly at higher temperatures

Is minimum at neutral temperature

Question 10

Always increases

Always decreases

May increase or decrease

Always remains constant

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