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Assertion (A): Germanium is more commonly used than silicon. Reason (R): Forbidden gap in germanium is less than that in silicon. | |
A. | Both A and R are true and R is correct explanation of A [Wrong Answer] |
B. | Both A and R are true but R is not a correct explanation of A [Wrong Answer] |
C. | A is true but R is false [Wrong Answer] |
D. | A is false but R is true [Correct Answer] |
View Answer
Explanation:-
Answer : D Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
Also Read Similar Questions Below :
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20
100
200
⇒ The pinch-off voltage is the drain voltage on the shorted gate drain curve above which the drain current becomes
almost negligible
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⇒ A voltage v = 100 sin ωt + 10 sin 5 ωt is applied to a pure capacitor having capacitance of 1 μF. If ω = 314 rad/sec, the current through the capacitor is
0.0314 cos 314 t + 0.0157 cos 1570 t
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⇒ For a transistor if a_{dc} = 0.98 and emitter current I_{E} is 2 mA, then collector current will be
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3.774 MHz
> 3.774 MHz
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⇒ The speeds used in recording audio programs in house hold recorders are
38 cm/s and 9.5 cm/s
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9.5 cm/s and 4.75 cm/s
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⇒ Shifting digits from left to right and vice versa is needed in
storing numbers
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counting
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⇒ Binary number 11001 is equivalent to decimal number
35
15
105
25
⇒ K maps can be drawn
only for 2 variables
only for 3 variables
only for 4 variables
for any number of variables
⇒ In the circuit, shown the current I marked is give
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⇒ In figure, power in 6 Ω resistor is zero then
202∠45°
20 ∠30°
20 ∠45°
202∠30°
⇒ It has been found that in a rectifier circuit with RC filter one RC section reduces ripple by 15%. Two RC sections are used in cascade the reduction in ripple would be
0.15
0.3
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⇒ A permeable substance is one
which is strong magnet
which is a weak magnet
which is a good conductor
through which magnetic lines of force can pass easily
⇒ A parity detector can detect
single error only
single error or odd number of errors
two errors
single or two errors
⇒ P flag is for parity.
TRUE
FALSE
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Hall transducer
Transformer
Speedometer
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Assertion (A): When light falls at junction of p-n photodiode, its p side becomes positive and n side becomes negative.
Reason (R): When a photodiode is short circuited, the current in the external circuit flows from p side to n side.
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Darlington's pair
Single stage amplifier
Cascade amplifier
Depends on the circuitry
⇒ Available multiplexer IC package can have a maximum of 8 inputs.
TRUE
FALSE
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TRUE
FALSE
⇒ AE 139 is a
tunnel diode
germanium power transistor
photoconductive cell
silicon diode
⇒ Which of the following codes is based on BCD format?
EBCDIC
ASCII
Hollerith
both (a) and (b)
⇒ If the switch is thrown to the START position, Q and Y will be equal to
Q = 0, Y = 0
Q= 1, Y= 1
Q = 1, Y = CLK
Q = 0, Y = CLK
⇒ A communication channel with AWGN operating at a signal to noise ratio SNR >> 1 and bandwidth B has capacity C_{1}. If the SNR is doubled keeping B constant, the resulting capacity C_{2} is given by
C_{2} ≈ 2C_{1}
C_{2} ≈ C_{1} + B
C_{2} ≈ C_{1} + 2B
C_{2} ≈ C_{1} + 0.3B
⇒ A digital clock uses __________ chip
SSI
LSI
VLSI
MSI
⇒ A full wave rectifier supplies a load of 1 kΩ. The a.c. Voltage applied to the diodes is 220 - 0 - 220 Volts rms. If diode resistance is neglected, then Average d.c. Voltage
220 V
200 V
198 V
0 volts
⇒ In a synchro transmitter-control transformer, the voltage induced in rotor winding of control transformer is zero when the angular displacement between rotors of transmitter and transformer is
0°
90°
180°
either (a) or (c)