- A−75 and 200
- B0 and 75
- C−25 and 300
- D−40 and 1000
Explanation:
Semiconductor can be used safely between temperature 0 and 75.
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For a thermocouple the neutral temperature is 270℃ when its cold junction is at 20℃. What will be the neutral temperature and the temperature of inversion when the temperature of cold junction is increased to 40 ℃
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(a) 290℃, 580℃ |
(b) 270℃, 580℃ |
(c) 270℃, 500 ℃ |
(d) 290 ℃, 540 ℃ |
An object is placed at a distance of f/2 from a convex lens. The image will be
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(a) At one of the foci, virtual and double its size |
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(b) At 3f / 2, real and inverted |
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(c) At 2f, virtual and erect |
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(d) None of these |
Which of the following is dependent on the intensity of incident radiation in a photoelectric experiment
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(a) Work function of the surface |
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(b) Amount of photoelectric current |
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(c) Stopping potential will be reduced |
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(d) Maximum kinetic energy of photoelectrons |
In the circuit shown here, the readings of the ammeter and voltmeter are

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(a) 6 A, 60 V |
(b) 0.6 A, 6 V |
(c) 6/11 A, 60/11 V |
(d) 11/6 A, 11/60 V |