- AParamagnetic substance.
- BFerromagntic substance.
- CDiamagnetic substance.
- DNon magnetic substance.
Explanation:
For ferromagnetic substances,$\chi_\text{m}$is large and positive.
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In the given figure the capacitors have a capacitance 4mF each if the capacitor
has a capacitance 10mF, then effective capacitance between A and B will be
|
(a) 2mF |
(b) 4mF |
(c) 6mF |
(d) 8mF |
In the above question, the power lost in the cable during transmission is
|
(a) 12.5 kW |
(b) 6.25 kW |
(c) 25 kW |
(d) 3.15 kW |
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Two coherent monochromatic light beams of intensities I and 4I are superposed. The maximum and minimum possible intensities in the resulting beam are
|
(a) 5I and I |
(b) 5I and 3I |
(c) 9I and I |
(d) 9I and 3I |
Positive rays was discovered by
|
(a) Thomson |
(b) Goldstem |
(c) W. Crookes |
(d) Rutherford |
When photon of energy 4.25 eV strike the surface of a metal A, the ejected photoelectrons have maximum kinetic energy TA eV and de-Brolie wavelength
. The maximum kinetic energy of photoelectrons liberated from another metal B by photon of energy 4.70 eV is
If the de-Broglie wavelength of these photoelectrons is
, then
|
(a) The work function of A is 2.25 eV |
(b) The work function of B is 4.20 eV |
|
(c) |
(d) |