MCQ
An electric dipole is kept in non-uniform elecric field. it experiences?
- AA force and a torque.
- BA force but not a torque.
- CA torque but not a force.
- DNeither a force nor a torque.
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Water boils in an electric kettle in 15 minutes after switching on. If the length of the heating wire is decreased to 2/3 of its initial value, then the same amount of water will boil with the same supply voltage in
|
(a) 15 minutes |
(b) 12 minutes |
(c) 10 minutes |
(d) 8 minutes |
The energy of an X- ray photon of wavelength 1.65 Å is (h = 6.6
, 1eV = 1.6 ![]()
|
(a) 3.5 keV |
(b) 5.5 keV |
(c) 7.5 keV |
(d) 9.5 keV |
