Explanation:
When two conductors carrying equal current both the conductor experiences a force which is perpendicular to the wire and are equal.
Since both these forces are equal and towards each other, both the current carrying wire will be repelling each other.
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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 |
A thin lens made of glass of refractive index 1.5 has a front surface + 11 D power and back surface – 6 D. If this lens is submerged in a liquid of refractive index 1.6, the resulting power of the lens is
|
(a) – 0.5 D |
(b) + 0.5 D |
(c) – 0.625 D |
(d) + 0.625 D |
What is the respective number of α and β particles emitted in the following radioactive decay 
|
(a) 6 and 8 |
(b) 8 and 8 |
(c) 6 and 6 |
(d) 8 and 6 |
A star producing light of wavelength 6000 Å moves away from the earth with a speed of 5 km/sec. Due to Doppler effect the shift in wavelength will be ( c = 3 
|
(a) 0.1 Å |
(b) 0.05 Å |
(c) 0.2 Å |
(d) 1 Å |
If the separation between slits in Young’s double slit experiment is reduced to 
the fringe width becomes n times. The value of n is
|
(a) 3 |
(b) |
(c) 9 |
(d) |
The two slits at a distance of 1 mm are illuminated by the light of wavelength 6.5 
. The interference fringes are observed on a screen placed at a distance of 1m. The distance between third dark fringe and fifth bright fringe will be
|
(a) 0.65 mm |
(b) 1.63 mm |
(c) 3.25 mm |
(d) 4.88 mm |
