UPSC Current Affairs Preparation: The Hindu Analysis Watch expert analysis of ‘The Hindu’ dated 08th January 2021. Important news and views to... View Article
The UPSC Mains 2020 kicked off on January 8, 2021, with the Essay Paper. The Essay Paper is counted for merit ranking in the UPSC scheme of... View Article
1) 4i-j+4k 2) 4i+j-4k 3) 2i+j+k 4) None of these Answer: (1) 4i-j+4k Solution: Given, three vectors a=i+2j+k, b=i-j+k and c=i+j-k Let r... View Article
1) 127/7 units 2) 148/7 units 3) 133/7 units 4) 139/7 units Answer: (1) 148/7 units Solution: F is the resultant force and vector d is the... View Article
The dielectric placed between the plates of the capacitor reduces the electric field strength between the plates of the capacitor, this results... View Article
Zn2+ is diamagnetic as it has all paired electrons. The valence shell electronic configuration of Zn2+ is 3d10. Cu2+ is paramagnetic since it has... View Article
There will be an increase in the energy stored in the capacitor when the dielectric is removed. The increase in the stored energy comes from the... View Article
Eddy current can result in the loss of electrical energy in the form of heat. There will be a magnetic flux leakage in induction coils due to... View Article
The primary coil and the secondary coil is wound on the soft iron core. The soft iron core has high permeability and it provides a complete... View Article
Gallium is used in electronic devices. Gallium arsenide, gallium nitride and indium gallium nitride are semiconductors. Gallium arsenide is used... View Article