The surface tension of a liquid is 70 dyne/cm. In MKS system its value is 

(1) 70 N/m

(2) 7 × 10–2 N/m

(3) 7 × 103 N/m

(4) 7 × 102 N/m

एक द्रव का पृष्ठ तनाव 70 डाइन/सेमी है। MKS पद्धति में इसका मान है:

(1) 70 N/m

(2) 7 × 10–2 N/m

(3) 7 × 103 N/m

(4) 7 × 102 N/m

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If force (F), velocity (v) and time (T) are taken as fundamental units, then the dimensions of mass are

(a) [FvT-1]

(b) [FvT-2]

(c) [Fv-1T-1]

(d) [Fv-1T]

यदि बल (F), वेग (v) और समय (T) को मूल मात्रक के रूप में लिया जाता है, तो द्रव्यमान की विमा क्या हैं?

(a) [FvT-1]

(b) [FvT-2]

(c) [Fv-1T-1]

(d) [Fv-1T]

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Which of the following is not equal to watt ?

(1) Joule/second

(2) Ampere × volt

(3) (Ampere)2 × ohm

(4) Ampere/volt

निम्नलिखित में से कौन सा वाट के बराबर नहीं है?

(1) जूल/सेकण्ड 

(2) एम्पियर ×वोल्ट 

(3) (एम्पियर)2 ×ओम 

(4) एम्पियर/वोल्ट 

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The SI unit of universal gas constant (R) is

(1) Watt K–1 mol–1

(2) Newton K–1 mol–1

(3) Joule K–1 mol–1

(4) Erg K–1 mol–1

सार्वत्रिक गैस नियतांक का SI मात्रक (R) है:

(1) वाट K–1 मोल–1

(2) न्यूटन K–1 मोल–1

(3) जूल K–1 मोल–1

(4) अर्ग K–1 मोल–1

 54%
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Assertion :Mass, length and time are fundamental physical quantities.

Reason : They are independent of each other.

अभिकथन: द्रव्यमान, लंबाई और समय मूल भौतिक राशियाँ हैं।

कारण: यें एक-दूसरे से स्वतंत्र हैं।

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
 50%
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What are the units of K=1/4πε0

(1) C2N–1m–2

(2) Nm2C–2

(3) Nm2C2

(4) Unitless

K=1/4πε0 का मात्रक क्या हैं?

(1) C2N–1m–2

(2) Nm2C–2

(3) Nm2C2

(4) मात्रकविहीन 

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A physical quantity A is related to four observable a, b, c and d as follows, A=a2b3cd, the percentage errors of measurement in a, b, c and d are 1%,3%,2% and 2% respectively. What is the percentage error in the quantity A 

(1) 12%

(2) 7%

(3) 5%

(4) 14%

एक भौतिक राशि चार प्रेक्षणीय राशियों abc और d से निम्नलिखित रूप से सम्बन्धित है, A=a2b3cd,

abc और के मापन में प्रतिशत त्रुटियां क्रमशः 1%, 3%, 2% और 2% हैं। राशि में प्रतिशत त्रुटि क्या है?

(1) 12%

(2) 7%

(3) 5%

(4) 14%

 54%
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Dimensional formula for volume elasticity is

(1) M1L2T2

(2) M1L3T2

(3) M1L2T2

(4) M1L1T2

आयतन प्रत्यास्थता के लिए विमीय सूत्र है:

(1) M1L2T2

(2) M1L3T2

(3) M1L2T2

(4) M1L1T2

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Which relation is wrong

(1) 1 Calorie = 4.18 Joules

(2) 1Å=1010m

(3) 1  MeV=1.6×1013Joules

(4) 1Newton=105Dynes

कौन सा संबंध गलत है:

(1) 1 कैलोरी  = 4.18 जूल 

(2) 1Å=1010m

(3) 1  MeV=1.6×1013 जूल 

(4) 1  न्यूटन =105  डाइन 

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Identify the pair whose dimensions are equal  

(1) Torque and work

(2) Stress and energy

(3) Force and stress

(4) Force and work

उस युग्म को पहचानिए जिनकी विमाएँ समान हैं: 

(1) बल आघूर्ण और कार्य

(2) तनाव और ऊर्जा

(3) बल और तनाव

(4) बल और कार्य

 61%
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