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Solution


Q.

Which of the following set have different dimensions              [2005]
1 Pressure, Young’s modulus, Stress  
2 EMF, Potential difference, Electric potential  
3 Heat, Work done, Energy  
4 Dipole moment, Electric flux, Electric field  

Ans.

(4)

Electric flux ϕE=E→·S→

∴ Dimensionally ϕE≠E (electric field)

Dipole moment, p=charge (q)×distance (d)