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Assertion (A): If A = 0.5 ∠ 20°, A^{2} = 0.25 ∠ 40°. Reason (R): When drawing a phasor diagram, sinusoids may have the same or different frequencies. | |
A. | Both A and R are true and R is correct explanation of A [Wrong Answer] |
B. | Both A and R are true and R is not the correct explanation of A [Wrong Answer] |
C. | A is true but R is false [Correct Answer] |
D. | A is false but R is true [Wrong Answer] |
View Answer
Explanation:-
Answer : C Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
Also Read Similar Questions Below :
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Series resonance : Parallel resonance
DC : AC
Regulation : Efficiency
⇒ Which mode is usually preferred for cascading?
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⇒ A line of characteristic impedance 400 Ω is terminated by a resistance of 400 Ω. The reflected quantities are
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equal to incident quantities
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double the incident quantities
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⇒ RECTIFIER : OSCILLATOR ::
Capacitance : Inductance
Series resonance : Parallel resonance
DC : AC
Regulation : Efficiency
⇒ Which mode is usually preferred for cascading?
CE
CB
CC
Any of the above
⇒ A line of characteristic impedance 400 Ω is terminated by a resistance of 400 Ω. The reflected quantities are
zero
equal to incident quantities
half the incident quantities
double the incident quantities
⇒ The AM, PM, and TV broadcast frequencies are
of the same order as microwave range
much lower than microwave range
much higher than microwave range
either (a) or (c)
⇒ In PCM, the biggest disadvantage as compared to AM is
larger bandwidth
larger noise
inability to handle analog signals
incompatibility with time division multiplex systems
⇒ The transition of electron from energy level W_{1} to W_{2} is associated with emission or absorption of electro magnetic radiation of frequency f such that
hf = |W_{1} - W_{2}|
|W_{1} - W_{2}|f = h
hf = 0.5|W_{1} - W_{2}|
(hf)^{2} = |W_{1} - W_{2}|
⇒ The charges between a hollow and solid metal spheres reside
through out in both
on outer surface in hollow and through out in solid
on the outer surface in both
none of the above
⇒ When a pentavalent impurity is added, the semiconductor becomes
p type
n type
intrinsic
neutral
⇒ With respect to the Miller integrator sweep shown below, the sweep rate wil
2
4
1.5
2.5
⇒ DC ampere hour meter is an indicating instrument.
TRUE
FALSE
⇒ When a lead acid cell is in fully charged condition the specific gravity of electrolyte is about 1.22.
TRUE
FALSE
⇒ In sinusoidal PWM for inverters the width of different pulses are not the same.
TRUE
FALSE
⇒ Decimal -90 equals __________ in 8 bit 2s complement
1000 1000
1010 0110
1100 1100
0101 0101
⇒ Hollow waveguides are used as transmission lines at frequencies
above 1 GHz
above 5 GHz
above 10 MHz
above 1 MHz
⇒ Consider the following stateme
1 only
1 and 2
2 and 3
3 only
⇒ Square law modulators utilise
linear range of V-I characteristics of a diode
linear range of V-I characteristics of a triode
non-linear region of V-I dynamic characteristics of a diode
non-linear region of V-I dynamic characteristics of a triode
⇒ Free electrons exist in
first band
second band
third band
conduction band
⇒ In push pull amplifier, each transistor conducts for
180°
360°
90°
45°
⇒ The equivalent form of the logical expression ABC + A BC + ABC + ABC + AB C is
C + (A ⊕ B)
(A + B + C)(A + B + C)
(A + B + C)(A + B + C)(A + B + C)
(A + B + C)(A + B + C)(A + B + C)
⇒ The SID data received is
LSB first
LSB last
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⇒ A network N is dual of network N if
both of them have same mesh equation
both of them have same node equation
mesh equation of one are the node equations of the other
KCL and KVL equations are the same
⇒ The time constant of the circuit after the switch shown in the figure is opene
0.2 s
5 s
0.1 s
dependent on R and hence cannot be determined unless R is known
⇒ Which of the following introduces mode partition noise?
Coaxial line
Waveguide
Fibre transmission line
Both coaxial line and waveguide
⇒ Since noise phase modulated FM wave, as the noise sideband frequency approaches the carrier frequency, the noise amplitude
is equalized
is increased
is decreased
remains constant
⇒ To multiply a number by 8 in 8085 we have to use
RAL
instructiononce
twice
thrice
four times
⇒
Match the following:
List I (Laws of Boolean) | List II (Relation algebra) | ||
---|---|---|---|
A. | Distributive law | 1. | x + x = x |
B. | DeMorgans law | 2. | x(y + z) = xy + xz |
C. | Idempotent law | 3. | (x) = x |
D. | Involution law | 4. | (x + y) = xy |
A-1, B-2, C-3, D-4
A-2, B-4, C-1, D-3
A-3, B-4, C-1, D-2
A-4, B-1, C-2, D-3
⇒ Time delay produced by an instruction code given below using 2 MHz clock
1783 μs
1787 μs
1781 μs
1797 μs
⇒ Holes and electrons move in opposite directions.
TRUE
FALSE
⇒ For a quadratic factor in denominator of transfer function the phase angle at corner frequency (in Bode phase angle plot)
is -90°
is +90°
depends on the damping factor
none of the above
⇒ Which of the following is true?
During addition if the carry into and carry out of the sign bit do not match then an overflow has occurred
During addition if the carry into and carry out of the sign bit don't match then an overflow or underflow has occurred
During addition if the carry into and carry out of the sign bit match then an overflow or underflow has occurred
During addition if the carry into and carry out of the sign bit match then an overflow has occurred