Mach number is equal to one when velocity of object is equal to:

(1) Velocity of light

(2) Velocity of sound (332  m/sec)

(3) 1  km/sec

(4) 1m/sec

माक संख्या एक के बराबर होती है जब वस्तु का वेग बराबर होता है:

(1) प्रकाश का वेग

(2) ध्वनि का वेग (332  m/sec)

(3) 1  km/sec

(4) 1m/sec

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The correct value of 0oC on the Kelvin scale is

(1) 273.15K

(2) 272.85K

(3) 273K

(4) 273.2K

केल्विन पैमाने पर 0oC का सही मान है-

(1) 273.15K

(2) 272.85K

(3) 273K

(4) 273.2K

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Candela is the unit of

(1) Electric intensity

(2) Luminous intensity

(3) Sound intensity

(4) None of these

कैंडेला किसका मात्रक है?

(1) विद्युत् तीव्रता

(2) ज्योति तीव्रता

(3) ध्वनि तीव्रता

(4) इनमें से कोई नहीं

 75%

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If 97.52 is divided by 2.54, the correct result in terms of significant figures is

(1) 38.4

(2) 38.3937

(3) 38.394

(4) 38.39

यदि 97.52 को 2.54 से विभाजित किया गया है, तो सार्थक अंकों के पदों में सही परिणाम क्या है?

(1) 38.4

(2) 38.3937

(3) 38.394

(4) 38.39

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Unit of power is 

(1) Kilowatt

(2) Kilowatt-hour

(3) Dyne

(4) Joule

शक्ति का मात्रक क्या है?

(1) किलोवॉट

(2) किलोवॉट -घंटा

(3) डाइन

(4) जूल

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Two quantities A and B have different dimensions. Which mathematical operation given below is physically meaningful 

(1) A/B

(2) A + B

(3) AB

(4) None

दो राशियों A और B की विमाएँ अलग-अलग हैं। नीचे दी गई गणितीय संक्रियाओं में कौन सी भौतिक रूप से सार्थक है?

(1) A/B

(2) A + B

(3) AB

(4) कोई नहीं

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Which of the following is smallest unit

(1) Millimetre

(2) Angstrom

(3) Fermi

(4) Metre

निम्नलिखित में से कौन सा सबसे छोटा मात्रक है?

(1) मिलीमीटर

(2) एंग्स्ट्रॉम

(3) फर्मी

(4) मीटर

 59%

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Which one has the dimensions different from the remaining three

(1) Power

(2) Work

(3) Torque

(4) Energy

किसकी विमा शेष तीनों से भिन्न है?

(1) शक्ति

(2) कार्य

(3) बल आघूर्ण

(4) ऊर्जा

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Dimensions of luminous flux are 

(1) ML2T2

(2) ML2T3

(3) ML2T1

(4) MLT2

ज्योति फ्लक्स की विमा है- 

(1) ML2T2

(2) ML2T3

(3) ML2T1

(4) MLT2

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Planck's constant has the dimensions (unit) of 

(1) Energy

(2) Linear momentum

(3) Work

(4) Angular momentum

प्लांक नियतांक की विमा (मात्रक) क्या हैं?

(1) ऊर्जा

(2) रेखीय संवेग

(3) कार्य

(4) कोणीय संवेग

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