Quantum-Theory
Find the (a) maximum frequency (b) minimum wavelength of X-rays produced by 30 kV electrons.
Question Id: PH0000012 Question : Find the (a) maximum frequency (b) minimum wavelength of X-rays produced by 30 kV electrons. Answer : (a) Maximu…
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Physics
A polythene piece rubbed with wool is found to have a negative charge of 3×10^{–7} C
Question Id: PH0000011 Question : A polythene piece rubbed with wool is found to have a negative charge of 3×10^{–7} C. (a) Estimate the numbe…
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Physics
An electric dipole with dipole moment 4 × 10^{–9} C.m is aligned at 30° with the direction of a uniform electric field of magnitude 5 × 10^4 NC^{–1} . Calculate the magnitude of the torque acting on the dipole.
Question Id: PH0000010 Question : An electric dipole with dipole moment 4\times 10^{-9} C.m is aligned at 30° with the direction of a uniform e…
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Physics
Explain why two field lines never cross each other at any point?
Question Id: PH0000009 Question: Explain why two electrostatic field lines never cross each other at any point? Explanation: Electrostatic field li…
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Physics
Explain the meaning of the statement ‘electric charge of a body is quantised'.
Question Id: PH0000008 Question: Explain the meaning of the statement ‘electric charge of a body is quantised'. Answer : Charge( may be positi…
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