Question
Emf is most closely related to
|
(a) Mechanical force |
(b) Potential difference |
|
(c) Electric field |
(d) Magnetic field |
✓
Answer
(b) Potential difference
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The magnetic susceptibility is negative for:
X-ray from a Coolidge tube is incident on a thin aluminium foil. The intensity of the X-ray transmitted by the foil is found to be I0. The heating current is increased to increase the temperature of the filament. The intensity of the X-ray transmitted by the foil will be:
- zero
- < I0
- I0
- > I0
The source of stellar energy is:
A gas behaves more closely as an ideal gas at:
- Low pressure and low temperature.
- Low pressure and high temperature.
- High pressure and low temperature.
- High pressure and high temperature.
Consider a binary star system consisting of two stars of masses 
and 
separated by a distance of 30 AU with a period of revolution equal to 30 years. If one of the two stars is 5 times farther from the centre of mass than the other. The masses of the two stars in terms of solar masses are
|
(a) 5, 15 |
(b) 25, 5 |
(c) 25, 10 |
(d) 7, 25 |
The dominant mechanisms for motion of charge carriers in forward and reverse biased silicon P-N junctions are
|
(a) Drift in forward bias, diffusion in reverse bias |
|
(b) Diffusion in forward bias, drift in reverse bias |
|
(c) Diffusion in both forward and reverse bias |
|
(d) Drift in both forward and reverse bias |
In the disintegration series 
the values of Z and A respectively will be
|
(a) 92, 236 |
(b) 88, 230 |
(c) 90, 234 |
(d) 91, 234 |
If a body is charged by rubbing it, its weight
The propagation constant of a photon of wavelength 6284 A°.
A double convex thin lens made of glass of refractive index 1.6 has radii of curvature 15 cm each. The focal length of this lens when immersed in a liquid of refractive index 1.63 is
|
(a) – 407 cm |
(b) 250 cm |
(c) 125 cm |
(d) 25 cm |