- AAbove the conduction band of the host crystal.
- BClose to the valence band of the host crystal.
- CClose to the conduction band of the host crystal.
- DBelow the valence band of the host crystal.
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The heat generated through 2 ohm and 8 ohm resistances separately, when a condenser of 200 μF capacity charged to 200 V is discharged one by one, will be
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(a) 4 J and 16 J respectively |
(b) 16 J and 4 J respectively |
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(c) 4 J and 8 J respectively |
(d) 4 J and 4 J respectively |
The emf of a thermocouple, one junction of which is kept at 0℃, is given by the Peltier co-efficient will be
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(a) (t + 273) (a + 2bt) |
(b) (t + 273) (a – 2bt) |
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(c) (t – 273) (a- 2bt) |
(d) (t – 273) (a – 2bt) |
A galvanometer of resistance 36 W is changed into an ammeter by using a shunt of 4 W. The fraction f0 of total current passing through the galvanometer is
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(a) |
(b) |
(c) |
(d) |
A battery consists of a variable number 'n' of identical cells having internal resistances connected in series. The terminals of battery are short circuited and the current i is measured. Which of the graph below shows the relation ship between i and n
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(a)
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(b)
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(c)
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(d)
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Following figure shows cross-sections through three long conductors of the same length and material, with square cross-section of edge lengths as shown. Conductor B will fit snugly within conductor A, and conductor C will fit snugly within conductor B. Relationship between their end to end resistance is

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(a) RA = RB = RC |
(b) RA > RB > RC |
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(c) RA < RB < R |
(d) Information is not sufficient |
The maximum number of possible interference maxima for slit-separation equal to twice the wavelength in Young’s double-slit experiment is
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(a) Infinite |
(b) Five |
(c) Three |
(d) Zero |