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Assertion (A): If an event A can happen in m ways and another event B can happen in n ways, both can happen in mn ways. Reason (R): Two events are mutually exclusive if happening of either precludes the occurrence of other. | |
A. | Both A and R are correct and R is correct explanation of A [Wrong Answer] |
B. | Both A and R are correct but R is not correct explanation of A [Correct Answer] |
C. | A is true, R is false [Wrong Answer] |
D. | A is false, 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 :
⇒ In a rare gas, the molecules of some atoms have an excess positive or negative charge. The electric field tends to shift positive ions relative to negative ions. This is known as ionic polarization.
TRUE
FALSE
⇒ When the circuit is switched on, the loop gain of a Wien bridge oscillator is
1
more than 1
less than 1
about 0.5
⇒ A reactor is used in a dual converter operating in non-circulating current mode.
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FALSE
⇒ In a metal the probability of a state 0.1 eV below Fermi level being occupied
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is the same as the probability of state 0.1 eV above Fermi level being occupied
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may be equal to or more or less than the probability of state 0.1 eV above Fermi level being occupied
⇒ The most commonly used moving iron instruments are
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attraction type
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none of the above
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load resistance is small
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⇒ TTL logic is preferred to DRL logic because
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⇒ Which of the following cannot be the Fourier series expansion of a periodic signal?
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x(t) = 2 cos pt + 7 cos t
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⇒ Which circuit is called swamped amplifier?
CC
CE
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⇒
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R is correct but A is wrong
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⇒ Which of the following describe the correct properties of an emitter follower circuit?
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⇒ The energy of highest value of Autocorrelation of a function 100 cos 50 pt is
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⇒ In an amplifier circuit the emitter is at ac ground potential in a
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⇒ Consider the following statements about Rhombic antenna
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⇒ The resistance of the circuit shown is figur
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⇒ In an R-S latch, race condition occurs when
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R and S are low
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⇒ The current wave shown in figure is applied by a 0.1 F capacitor at t = 0. At t = 0^{+}, the voltage across capacito
0
4 V
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⇒ When a current flows through a conductor,
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⇒ In a rare gas, the molecules of some atoms have an excess positive or negative charge. The electric field tends to shift positive ions relative to negative ions. This is known as ionic polarization.
TRUE
FALSE
⇒ When the circuit is switched on, the loop gain of a Wien bridge oscillator is
1
more than 1
less than 1
about 0.5
⇒ A reactor is used in a dual converter operating in non-circulating current mode.
TRUE
FALSE
⇒ In a metal the probability of a state 0.1 eV below Fermi level being occupied
is more than the probability of state 0.1 eV above Fermi level being occupied
is the same as the probability of state 0.1 eV above Fermi level being occupied
is less than the probability of state 0.1 eV above Fermi level being occupied
may be equal to or more or less than the probability of state 0.1 eV above Fermi level being occupied
⇒ The most commonly used moving iron instruments are
repulsion type
attraction type
a combination of attraction and repulsion type
none of the above
⇒ A voltage doubler circuit is fed by a voltage V_{m} sin ωt. The output voltage will be nearly 2 V_{m} only if
load resistance is small
load resistance is large
load resistance is neither small nor large
either (a) or (c)
⇒ TTL logic is preferred to DRL logic because
greater fan-out is possible
greater logic levels are possible
greater fan-in is possible
less power consumption is achieve
⇒ Which of the following cannot be the Fourier series expansion of a periodic signal?
x(t) = 2 cos t + 3 cos 3t
x(t) = 2 cos pt + 7 cos t
x(t) = cos t + 0.5
x(t) = 2 cos 1.5pt + sin 3.5 pt
⇒ Which circuit is called swamped amplifier?
CC
CE
CB
Both (a) and (b)
⇒ In an ideal junction transistor the impurity concentration in emitter (E ), base (B) and collector (C) is such that
E > B > C
B > C > E
C > E > B
C = E = B
⇒
Assertion (A): Potentiometers can not be used as error detectors in position control systems.
Reason (R): The resolution of a potentiometer places an upper limit on its accuracy
Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is correct but R is wrong
R is correct but A is wrong
⇒ Poor power factor
reduces load handling capability of electrical system
results in more power losses in the electrical system
overloads alternators, transformers and distribution lines
all
⇒ Which of the following describe the correct properties of an emitter follower circuit?
- It is a voltage series feedback circuit.
- It is a current series feedback circuit.
- Its voltage gain in less than unity.
- Its output impedance is very low.
1, 3 and 4
2, 3 and 4
2 and 3 only
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⇒ Bipolar IC memories are fabricated using
high density versions of MOSFET or low density versions of bipolar transistor flip-flop.
high density version of MOSFET or bipolar transistor flip-flop
low density versions of MOSFETs
high density versions of the bipolar transistor flip-flop.
⇒ The energy of highest value of Autocorrelation of a function 100 cos 50 pt is
50
10
200
zero
⇒ In a CD the channel separation is
1 μm
1.6 μm
2.5μm
4 μm
⇒ As the bandwidth increases, the cost of components
generally decreases
generally increases
may increase or decrease
does not change
⇒ For a 400 kHz transmission line having L = 0.5 mH/km, C = 0.08 mF and negligible R and G, the velocity propagation will be
15.8303 km/s
15.830 km/s
1.583 km/s
0.1583 km/s
⇒ Transport lag usually exists in
thermal systems
hydraulic systems and thermal systems
pneumatic systems
thermal, hydraulic and pneumatic systems
⇒ In a four variable K map eight adjacent cells give
single variable term
two variable term
three variable term
four variable term
⇒ In an amplifier circuit the emitter is at ac ground potential in a
CB circuit
CC circuit
CE circuit
both CB and CE circuit
⇒ An end fire array consisting of several half-wave lengths of directive gain 40, then Find width of major lobe for broadside
6°
5.73
51.25
0°
⇒ Consider the following statements about Rhombic antenna
- It is non resonant
- It is a broad band antenna
- It is ideally suited for HF transmission
1, 2, 3
1, 3 only
2, 3 only
1 only
⇒ For most metals, Fermi level E_{F} is less than
0.1 eV
2 eV
5 eV
10 eV
⇒ The resistance of the circuit shown is figur
5 Ω
More than 6 Ω
More than 4 Ω
Between 6 and 7 Ω
⇒ In an R-S latch, race condition occurs when
R is low and S is high
R and S are high
R and S are low
R is high and S is low
⇒ The current wave shown in figure is applied by a 0.1 F capacitor at t = 0. At t = 0^{+}, the voltage across capacito
0
4 V
10 V
20 V
⇒ When a current flows through a conductor,
an electric field exists at all points within the conductor
electric field exists only at all points on the surface of the conductor
electric field exists only at ends of the conductor
any of the above depending on magnitude of current
⇒ Some sources of TV programs are
- TV camera
- Telecine
- VTR
- External signal
1, 2, 3 and 4
1, 2, 3
1 and 3
1 2 and 4
⇒ The integral of a unit step function is
an impulse function
a ramp function
a ramp function of slope 1
none of these