- AElectric field
- BMagnetic field
- CPlasma field
- DGravitational field
Explanation:
Gravitational field applies minimum force on cathode rays because gravitational forces are proportional to masses but not charges.
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The intensity of X-rays from a Coolidge tube is plotted against wavelength as shown in the figure. The minimum wavelength found is
and the wavelength of the
line is
. As the accelerating voltage is increased

|
(a) ( |
(b) ( |
(c) |
(d) |
If a magnet is suspended at an angle 30o to the magnetic meridian, it makes an angle of 45o with the horizontal. The real dip is
|
(a) |
(b) |
(c) |
(d) |
Voltmeters V1 and V2 are connected in series across a D.C. line. V1 reads 80 volts and has a per volt resistance of 200 ohms. V2 has a total resistance of 32 kilo ohms. The line voltage is
|
(a) 120 volts |
(b) 160 volts |
(c) 220 volts |
(d) 240 volts |