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Assertion (A): Copper is a good conductor of electricity. Reason (R): Copper has a face centred cubic lattice. | |
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 correct explanation of A [Correct Answer] |
C. | A is true but R is false [Wrong Answer] |
D. | A is false but R is true [Wrong Answer] |
View Answer
Explanation:-
Answer : B Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
Also Read Similar Questions Below :
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a high input impedance as well as output impedance
a low input impedance and a high output impedance
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resistor between source and load
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⇒ A voltage v = 5 + 50 sin ωt/ + 5 sin 5 &omegat is applied to a pure capacitor of capacitance 1 ωF. If f/= 314 rad/sec, current is
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high voltage high current device
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13.5
13.75
13.625
13.875
⇒ A voltage v = 5 + 50 sin ωt/ + 5 sin 5 &omegat is applied to a pure capacitor of capacitance 1 ωF. If f/= 314 rad/sec, current is
1 + 0.0157 cos 314 t + 0.00785 cos 1570 t
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2
3
4
5
⇒ If e = 10 sin(10^{8} t + 3 sin 10^{4} t) then carrier frequency is
0.159 MHz
1.59 MHz
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⇒ A current source inverter has simple commutation circuit.
TRUE
FALSE
⇒ The gauge factor of a semiconductor strain gauge is about
2
10
100
1000
⇒ When sources of different frequencies feed a network the only method of solution is superposition theorem.
TRUE
FALSE
⇒ RAM can be expanded to
increase word size
increase word number
either increase word size or increase word number
none of the above
⇒ A permanent magnet moving coil meter can be used as
ac only
dc only
both ac and dc
low frequency ac and dc
⇒ Generally op amp is used in
open loop
closed loop
cascaded loop
either (a) or (c)
⇒ The word 'LORAN' means
long range navigation
long range TV transmission
long range cable transmission
either (b) or (c)
⇒ Which of the following best represents the output impedance of an actual op-amp?
10 ohm
100 ohm
10 k ohm
100 k ohm
⇒ Which of the following is the least important consideration while selecting a logic technology?
Power dissipation
Noise immunity
Number of pins
Cost
⇒
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A is false, R is true
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a motional e.m.f. is produced by a coil moving in a magnetic field
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⇒ L [f(t - a)] = F(jω) e^{-jωa}
TRUE
FALSE
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1.08 x 10^{4} A/cm^{2}
4.32 x 10^{3} A/cm^{2}
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⇒ K maps can be drawn
only for 2 variables
only for 3 variables
only for 4 variables
for any number of variables
⇒ A notch filter is sometimes used in communication receivers to
reduce receiver gain at some specific frequency
increase receiver gain at some specific frequency
made selectivity more precise
spread the bandwidth
⇒ Occasionally a discrete amplifier user RF chokes instead of collector resistors. Such amplifiers are inherently
low pass amplifiers
high pass amplifiers
band pass amplifiers
none of the above
⇒ Consider two random processes x(t) and y(t) have zero mean, and they are individually stationary. The random process is z(t) = x(t) + y(t). Now when stationary processes are uncorrelated then power spectral density of z(t) is given by
S_{x}(f) + S_{y}(f) + 2S_{xy}(f)
S_{x}(f) + S_{y}(f) + 2S_{xy}(f) + 2S_{yx}(f)
S_{x}(f) + S_{y}(f)
S_{x}(f) + S_{y}(f) - 2S_{xy}(f) - 2S_{yx}(f)
⇒
Assertion (A): For same drain current rating N-channel MOSFET occupies more area than p-channel MOSFET.
Reason (R): Electron mobility is much higher than hole mobility.
Both A and R are individually true and R is the correct explanation of A
Both A and R are individually true but R is not the correct explanation of A
A is true but R is false
A is false but R is true
⇒ Which amplifier has the higher power gain?
Common emitter
Common collector
Common base
Both CC and CE
⇒ Paper capacitors are used in power supplies for filtering.
TRUE
FALSE
⇒ For the truth table of the given figure
A + B + C
A + BC
A
B