To obtain a p-type germanium semi-conductor, it must be doped with
1 arsenic
2. antimony
3. indium
4. phosphorous
Subtopic: Types of Semiconductors |
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Sound waves do not show the phenomenon of:
1. interference
2. diffraction
3. refraction
4. polarisation
1. interference
2. diffraction
3. refraction
4. polarisation
Subtopic: Polarization of Light |
65%
From NCERT
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The magnifying power of a compound microscope is high if
1. both the objective and the eyepiece has short focal lengths
2. both the objective and the eyepiece have long focal lengths
3. the objective has a short focal length and the eyepiece has a long focal length
4. the objective has a long focal length and the eyepiece has a short focal length
Subtopic: Simple & Compound Microscope |
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Subtopic: Radioactivity (OLD NCERT) |
63%
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times
Subtopic: Introduction |
52%
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An alternating voltage V = V0 sin ωt is applied across a circuit. As result flows in it. The power consumed per cycle is
1. zero
Subtopic: RMS & Average Values |
64%
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. The angle of prism is A. If the angle of minimum deviation is equal to the angle of the prism, then the value of A is
Subtopic: Logic gates |
66%
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The half-life of a radioactive substance is 10 days. This means that
1. The substance completely disintegrates in 20 days
2. The substance completely disintegrates in 40 days
3. 1/8 part of the mass of the substance will be left intact at the end of 40 days
4. 7/8 part of the mass of the substance disintegrates in 30 days
Subtopic: Radioactivity (OLD NCERT) |
From NCERT
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