The C.O.P. of a Carnot refrigerator in winter will be _________ as compared to C.O.P. in summer.

The Carnot co-efficient of performance (COP) of a domestic air conditioner compared to a household refrigerator is

A

Less

B

More

C

Same

D

Dependent on climatic conditions

If both Stirling and Carnot cycles operate within the same temperature limits, then efficiency of Stirling cycle as compared to Carnot cycle

A

More

B

Less

C

Equal

D

Depends on other factors

The Winter Olympics of 2024 and the Summer Olympics of 2024 will take place in Paris. How many gold, silver and bronze medals did Bangladesh win the Summer Olympics so far?

A

01, 1, 1

B

0, 1, 0

C

0, 0, 1

D

0, 0, 0

E

1, 0, 1

COP-26 কোথায় অনুষ্ঠিত হবে ? (Where will COP-26 be held?)

A

Canada

B

France

C

Netherland

D

Scottland

COP-26 এ COP মানে কী?

A

কনফারেন্স অব দ্য প্যারিস

B

কনফারেন্স অব দ্য পাওয়ার

C

কনফারেন্স অব দ্য পার্টিস

D

কনফারেন্স অব দ্য প্রটোকল

The co-efficient of performance (COP) of a refrigerating system, which is its index of performance, is defined as the ratio of useful refrigeration to the net work. The units of __________ and COP are the same.

A

Kinematic viscosity

B

Work

C

Temperature

D

None of these

The COP of a domestic refrigerator

A

Is less than 1

B

Is more than 1

C

Is equal to 1

D

Depends upon the make

Co-efficient of Performance (COP) of a refrigerator is the ratio of the

A

Work required to refrigeration obtained

B

Refrigeration obtained to the work required

C

Lower to higher temperature

D

Higher to lower temperature

In a working refrigerator, the value of COP is always

A

0

B

> 1

The C.O.P for reverse Carnot refrigerator is 2. The ratio of lowest temperature to highest temperature will be

A

twice

B

half

C

four times

D

three times

The C.O.P. of a Carnot refrigerator in winter will be _________ as compared to C.O.P. in summer.

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