Physics

Dimensions of '$$ohm$$' are same as (where $$h$$ is Planck's constant and $$e$$ is charge)


ANSWER

$$\dfrac {h}{e^2}$$


SOLUTION
'ohm' is the unit of resistance and having dimension $$ =[ML^2T^{-3}A^{-2}]$$
From option C $$\Rightarrow  \dfrac {h}{e^2}=\dfrac {ML^2T{-1}}{(AT)^2}=[ML^2T^{-3}A^{-2}]=Resistance (ohm)$$
View Answers

You're just one step away

Create your Digital Resume For FREE on your name's sub domain "yourname.wcard.io". Register Here!


Single Correct Medium Published on 18th 08, 2020
Next Question
Questions 244531
Subjects 8
Chapters 125
Enrolled Students 198
Enroll Now For FREE

Realted Questions

Q1 Single Correct Medium
Given that v is the speed, r is radius and g is acceleration due to gravity. Which of the following is dimensionless?
  • A. $$\dfrac{{ v }^{ 2 }r}{g}$$
  • B. $$\dfrac{{ v }^{ 2 }}{rg}$$
  • C. $$\dfrac{{ v }^{ 2 }g}{r}$$
  • D. $${ v }^{ 2 }rg$$

Asked in: Physics - Units and Measurement


1 Verified Answer | Published on 18th 08, 2020

View Answer
Q2 Subjective Medium
If $$ x = a + bt + ct^2$$, where 'x' is in metre and 't' in second. What are the units of b and 'c'. 

Asked in: Physics - Units and Measurement


1 Verified Answer | Published on 18th 08, 2020

View Answer
Q3 Single Correct Medium
Which of the following is dimensionally incorrect ?
  • A. $$u=v-at$$
  • B. $$s-ut=\dfrac{1}{2}at^2$$
  • C. $$u^2=2a(gt-1)$$
  • D. $$v^2-u^2=2as$$

Asked in: Physics - Units and Measurement


1 Verified Answer | Published on 18th 08, 2020

View Answer
Q4 Subjective Medium
How will you determine the volume of a cuboid write the formula you will use.

Asked in: Physics - Units and Measurement


1 Verified Answer | Published on 18th 08, 2020

View Answer
Q5 TRUE/FALSE Medium
State whether true or false :
 
When a body is at a depth 'd' from the earth surface its distance from the center of the earth is R-d (R= Radius of the earth).
  • A. True
  • B. False

Asked in: Physics - Units and Measurement


1 Verified Answer | Published on 18th 08, 2020

View Answer