A point charge of 5 x 10-6 C experiences a force of 2 x 10-3 N

Subject

Physics

Class

ICSE Class 12

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Sample Papers

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 Multiple Choice QuestionsMultiple Choice Questions

1. 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
  • an excess of 8 electrons
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2. Figure 1 below shows five dc sources (cells). Their emfs are shown in the figure.


  • 8V 
  • 16V
  • 4V  
  • 4V  
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3. Which one of the following graphs in represents variation of reactance ‘XC’ of a capacitor with frequency ‘f ’ of an AC supply:
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4. 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 
  • Band Spectrum 
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5. Binding energy of a nucleus is of the order of:
  • Electron volt (eV) 
  • Kilo-electron volt (KeV)
  • Mega electron volt (MeV)
  • Mega electron volt (MeV)
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 Multiple Choice QuestionsShort Answer Type

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6. A point charge of 5 x 10-6 C experiences a force of 2 x 10-3 N when kept in a uniform electric field of intensity E. Find E.


Electric field Intensity,

E = fraction numerator 2 space straight x space 10 to the power of negative 3 end exponent over denominator 5 space straight x space 10 to the power of negative 6 end exponent end fraction space equals space fraction numerator 2 space x 10 cubed over denominator 5 end fraction equals 400 space V divided by m

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7. Which conservation principle is involved in Kirchoffs first law of electric circuits?
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8. Write an expression of magnetic flux density ‘B’ at a point in end - on position or an axial position of a magnetic dipole, (Derivation not required.)
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9. In a moving coil galvanometer, what is meant by a radial magnetic field?
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10. Variation of alternating current T with time ‘t’ is shown in the graph below :




What is the rms value of this current?
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