Dimensions of frequency are 

(1) M0L1T0

(2) M0L0T1

(3) M0L0T

(4) MT2

आवृत्ति की विमा है-

(1) M0L1T0

(2) M0L0T1

(3) M0L0T

(4) MT2

 65%

To unlock all the explanations of this course, you need to be enrolled.

Hints

The dimensions of Farad are , where Q represents electric charge         [Only for droppers]

(1) M1L2T2Q2

(2) M1L2TQ

(3) M1L2T2Q

(4) M1L2TQ2

फैरेड की विमा क्या है, जहाँ Q वैद्युत आवेश को दर्शाता है?

[केवल ड्रॉपर के लिए]

(1) M1L2T2Q2

(2) M1L2TQ

(3) M1L2T2Q

(4) M1L2TQ2

To unlock all the explanations of this course, you need to be enrolled.

Hints

Of the following quantities, which one has dimensions different from the remaining three 

(1) Energy per unit volume

(2) Force per unit area

(3) Product of voltage and charge per unit volume

(4) Angular momentum per unit mass

निम्नलिखित राशियों में से, किसकी शेष तीनों से विमाएँ भिन्न हैं?

(1) प्रति एकांक आयतन में ऊर्जा

(2) प्रति एकांक क्षेत्रफल में बल

(3) वोल्टता और प्रति एकांक आयतन में आवेश का गुणनफल

(4) प्रति एकांक द्रव्यमान में कोणीय संवेग

To unlock all the explanations of this course, you need to be enrolled.

Hints

advertisementadvertisement

The units of angular momentum are

(1) kgm2/s2

(2) Joules

(3) Joule/s

(4) kgms2

कोणीय संवेग का मात्रक है-

(1) kgm2/s2

(2) Joules

(3) Joule/s

(4) kgms2

To unlock all the explanations of this course, you need to be enrolled.

Hints

The unit of angular acceleration in the SI system is 

(1) Nkg1

(2) ms2

(3) rads2

(4) mkg1K

SI पद्धति में कोणीय त्वरण का मात्रक क्या है?

(1) Nkg1

(2) ms2

(3) rads2

(4) mkg1K

To unlock all the explanations of this course, you need to be enrolled.

Hints

A physical quantity of the dimensions of length that can be formed out of c,G and e24πεο is [c is velocity of light, G is universal constant of gravitation and e is charge]

(a) 1c2Ge24πεo12

(b) c2Ge24πεo12

(c) 1c2e2G4πεo12

(d) 1cGe24πε0

लंबाई की विमा की एक भौतिक राशि जिसे c,G और e24πεο से निर्मित किया जा सकता है, है

[c प्रकाश का वेग है, G सार्वत्रिक गुरूताकर्षण नियतांक है और e आवेश है]

(a) 1c2Ge24πεo12

(b) c2Ge24πεo12

(c) 1c2e2G4πεo12

(d) 1cGe24πε0

To unlock all the explanations of this course, you need to be enrolled.

Hints

advertisementadvertisement

The dimensions of ab in the equation P=at2bx, where P is pressure, x is distance and t is time, are 

(1) MT–2

(2) M2LT–3

(3) ML3T–1

(4) LT–3

समीकरण P=at2bx में ab की विमा क्या है, जहाँ दाब है, दूरी है और समय है?

(1) MT–2

(2) M2LT–3

(3) ML3T–1

(4) LT–3

To unlock all the explanations of this course, you need to be enrolled.

Hints

If radius of the sphere is (5.3 ± 0.1)cm. Then percentage error in its volume will be 

(1) 3+6.01×1005.3

(2) 13×0.01×1005.3

(3) 3×0.15.3×100

(4) 0.15.3×100

यदि गोले की त्रिज्या (5.3 ± 0.1)cm है। तब इसके आयतन में कितने प्रतिशत त्रुटि होगी?

(1) 3+6.01×1005.3

(2) 13×0.01×1005.3

(3) 3×0.15.3×100

(4) 0.15.3×100

 57%

To unlock all the explanations of this course, you need to be enrolled.

Hints

E, m, l and G denote energy, mass, angular momentum and gravitational constant respectively, then the dimension of El2m5G2 are

(1) Angle

(2) Length

(3) Mass

(4) Time

E, m, l और क्रमशः ऊर्जा, द्रव्यमान, कोणीय संवेग और गुरुत्वाकर्षण नियतांक को निरूपित करते हैं, तब El2m5G2की विमा है-

(1) कोण

(2) लंबाई

(3) द्रव्यमान

(4) समय

To unlock all the explanations of this course, you need to be enrolled.

Hints

advertisementadvertisement

Assertion : Parallex method cannot be used for measuring distances of stars more than 100 light years away.

Reason : Because parallex angle reduces so much that it cannot be measured accurately.

अभिकथन: 100 से अधिक प्रकाश वर्ष दूर सितारों की दूरी मापने के लिए लंबन पद्धति का उपयोग नहीं किया जा सकता है।

कारण: क्योंकि लंबन कोण इतना कम हो जाता है कि इसे यथार्थता से नहीं मापा जा सकता है।

  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

To unlock all the explanations of this course, you need to be enrolled.

Hints