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Q. No.
In an n-type semiconductor, which of the following statement is true?
1. Electrons are minority carriers and pentavalent atoms are dopants.
2. Holes are minority carriers and pentavalent atoms are dopants.
3. Holes are the majority carriers and trivalent atoms are dopants.
4. Electrons are majority carriers and trivalent atoms are dopants.
2. Holes are minority carriers and pentavalent atoms are dopants.
3. Holes are the majority carriers and trivalent atoms are dopants.
4. Electrons are majority carriers and trivalent atoms are dopants.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyPrefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe output (X) of the logic circuit shown in figure will be:
1. X =
2. X = A.B
3. X =
4. X =
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTwo ideal diodes are connected to a battery as shown in the circuit. The current supplied by the battery is:
1. 0.75 A
2. zero
3. 0.25 A
4. 0.5 A
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn a CE transistor amplifier, the audio signal voltage across the resistance of 2 k is 2V. If the base resistance is 1 k and the current amplification of the transistor is 100, the input signal voltage is:
1. 0.1 V
2. 1.0 V
3. 1 mV
4. 10 mV
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyC and Si both have the same lattice structure, having 4 bonding electrons in each. However, C is an insulator whereas Si is an intrinsic semiconductor. This is because:
| 1. | in the case of C, the valence band is not completely filled at absolute zero temperature. |
| 2. | in the case of C, the conduction band is partly filled even at absolute zero temperature. |
| 3. | the four bonding electrons in the case of C lie in the second orbit, whereas in the case of Si, they lie in the third. |
| 4. | the four bonding electrons in the case of C lie in the third orbit, whereas for Si, they lie in the fourth orbit. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTransfer characteristics [output voltage () vs input voltage ()] for a base biased transistor in CE configurations are as shown in the figure. For using the transistor as a switch, it is used:
1. In region III
2. Both in the region (I) and (III)
3. In region II
4. In region I
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe figure shows a logic circuit with two inputs A and B and the output C. The voltage waveforms across A, B, and C are as given. The logic circuit gate is:
1. OR gate
2. NOR gate
3. AND gate
4. NAND gate
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe symbolic representation of four gates is shown as:
Pick out which ones are for AND, NAND, and NOT gates, respectively.
1. (i), (iv), and (iii)
2. (ii), (iii), and (iv)
3. (ii), (iv), and (iii)
4. (ii), (iv), and (i)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. the antimony becomes an acceptor atom.
2. there will be more free electrons than holes in the semiconductor.
3. its resistance is increased.
4. it becomes a p-type semiconductor.
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