A body has a positive charge of 8 x 10^-19 C. It has:

• an excess of 5 electrons 
• a deficiency of 5 electrons
• an excess of 8 electrons
• a deficiency of 8 electrons

Figure 1 below shows five dc sources (cells). Their emfs are shown in the figure.

• 8V 
• 16V
• 4V  
• 2V

Which one of the following graphs in represents variation of reactance ‘X_C’ of a capacitor with frequency ‘f ’ of an AC supply:

• 
• 
• 
• 

D.

White light is passed through sodium vapours contained in a thin walled glass flask and the transmitted light is examined with the help of a spectrometer. The spectrum so obtained is:

• Absorption spectrum 
• Solar Spectrum
• Band Spectrum 
• Continuous Spectrum

Binding energy of a nucleus is of the order of:

• Electron volt (eV) 
• Kilo-electron volt (KeV)
• Mega electron volt (MeV)
• a joule (J)