Two capacitors of capacitance 2 μF and 3μF are joined in series. Outer plate first capacitor is at 1000 volt and outer plate of second capacitor is earthed (grounded). Now the potential on inner plate of each capacitor will be
|
(a) 700 Volt |
(b) 200 Volt |
(c) 600 Volt |
(d) 400 Volt |
(d) 400 Volt
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Huygen’s principle of secondary wavelets may be used to
|
(a) Find the velocity of light in vacuum |
|
(b) Explain the particle behaviour of light |
|
(c) Find the new position of the wavefront |
|
(d) Explain photoelectric effect |
A magnetic needle suspended horizontally by an unspun silk fibre, oscillates in the horizontal plane because of the restoring force originating mainly from
| (a) The torsion of the silk fibre |
| (b) The force of gravity |
|
(c) The horizontal component of earth's magnetic field |
| (d) All the above factors |
The resistances of a wire at temperatures t℃ and 0℃ are related by
|
(a) |
(b) |
(c) |
(d) |
A point source of light is used in an experiment on photoelectric effect. Which of the following curves best represents the variation of photo current (i) with distance (d) of the source from the emitter
|
(a) a |
(b) b |
(c) c |
(d) d |
In a thermocouple, the temperature that does not depend on the temperature of the cold junction is called
|
(a) Neutral temperature |
(b) Temperature of inversion |
|
(c) Both the above |
(d) None of the above |
The mechanism of the heat produced in a conductor when an electric current flows through it, can be explained on the basis of
|
(a) Viscosity |
(b) Friction |
(c) Free electron theory |
(d) Gauss's theorem |
Which of the following isotopes is normally fissionable ?
|
(a) |
(b) |
(c) |
(d) |
