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Assertion (A): A graph is planar if it has a dual. Reason (R): The dual of a graph can be found by window dot method. | |
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 :
⇒ The circuit in figure is switched on at t = 0. At any time t, i(t3 + 3e^{-1}
6 - 3e^{-1}
3 - 3e^{-t}
6 - 6e^{-1}
⇒ What is the frequency of pulse at the points a, b, c in the circ
3 MHz
7.8 KHz
10 KHz
1 MHz
⇒ To draw dc equivalent circuit for a CE amplifier circuit we should
Reduce all ac sources to zero
Open all capacitors
Reduce all ac sources to zero and open all capacitors
Reduce all ac sources to zero and short all capacitors
⇒ For the two port of figure, z_{2226/7 Ω6/7 Ω2/3 Ω1 Ω}
⇒ Calculate the stability factor and change in I_{C} from 25°C to 100°C for, β = 50, R_{B}/ R_{E} = 250, ΔI_{C0} = 19.9 nA for emitter bias configuration.
42.53, 0.85 μA
40.91, 0.58 μA
40.91, 0.58 μA
41.10, 0.39 μA
⇒ The minority carrier life time and diffusion constant in a semiconductor material are respectively 100 microsecond and 100 cm^{2}/sec. The diffusion length is
0.1 cm
0.01 cm
0.0141 cm
1 cm
⇒ An R-C coupled amplifier has mid-frequency gain of 200 and a frequency response from 100 Hz to 20 kHz. A negative feedback network with β = 0.2 is incorporated into the amplifier circuit, the Bandwidth will be
50 kHz
20 kHz
100 kHz
infinite
⇒ A network contains only independent current source and resistors. If the values of all resistors are doubled, the value of the node voltage
will become half
will remain unchange
will become one third
cannot be determined unless the circuit configuration and the values of the resistors are known
⇒ The electrical energy required to heat a bucket of water to a certain temperature is 2 kWh. If heat losses, are 25%, the energy input is
2.67 kWh
3 kWh
2.5 kWh
3.5 kWh
⇒ When deflecting torque and braking torque in an energy meter are zero,
the disc rotates at steady speed
the disc is stationary
the disc accelerates
the disc retards
⇒ Which of the following theorems is a manifestation of law of conservation of energy?
Tellegen's theorem
Reciprocity theorem
Thevenin's theorem
Norton's theorem
⇒ A low noise device is most important
at front end of equipment
in the last stage of equipment
in the middle stages of equipment
both (b) and (c)
⇒ A resistance of 5 ohms is connected in one branch of a network. The current in this branch is 2.2. A. If the resistance is increased to 7.5 Ω, the remaining circuit being the same, the current in this branch will be
2.2 A
less than 2.2 A
2.2 A or less than 2.2 A
2.2 A or less or more than 2.2 A
⇒ What is an advantage of an electronic voltmeter over a non-electronic voltmeter?
Low power consumption
Low input impedance
The ability to measure wide ranges of voltages and resistance
Large portability
⇒ The sum of 1110101_{2} and 11011_{2} in decimal form will be
65
75
85
95
⇒ For the system of the given figure |G(jω)| = 0 dB at &omeg
0
1 rad/sec.
∞
2.38 rad/sec.
⇒
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
A is wrong but R is correct
⇒
A-1, B-3, C-2, D-5, E-4
A-3, B-3, C-1, D-5, E-4
A-2, B-1, C-4, D-5, E-5
A-4, B-2, C-5, D-3, E-1
⇒ The current in a p-n junction diode with V volts applied in p region relative to n region (where I_{0} is reverse saturation current, m is ideality factor, k is Boltzmann's constant, T is absolute temp and q is charge on electron) is
I_{0} (e^{-qV/mkT} - 1)
I_{0} e^{-qV/mkT}
I_{0} (e^{qV/mkT})
I_{0} (e^{qV/mkT} - 1)
⇒ The resistance of a superconductor is
low
very low
very very low
zero
⇒ Which of the following quantities cannot be measured/determined using Hall effect?
Type of semiconductor (p or n)
Mobility of charge carriers
Diffusion constant
Carrier concentration
⇒ Multiplex techniques are used for
low density communications
low density point-to-point communications
high-density point-to-point communications
all of the above
⇒ The voltage e_{o} indicated in the figure has been measured by an ideal voltmeter. Which of the following can be calcula
Bias current of inverting input only
Bias current of inverting and non-inverting inputs only
Input offset current only
Both the bias currents and the I/P offset current
⇒ Which of the following closely represents the resistance-temperature characteristics of thermistor?
R_{T} = a R_{0} e^{b/t}
R_{T} = a R_{0} E^{-b/t}
R_{T} = - a R_{0} e^{-b/t}
R_{T} = - R_{0} e^{b/t}
⇒ Which of the following statements defines a full adder?
It adds two binary digits and produces their SUM and CARRY
It adds three inputs (two binary digits and a carry) and produces their SUM and CARRY
It has two inputs and two outputs
None of the above
⇒ A series LCR circuit consisting of R = 20 Ω, | X_{L} | = 20 Ω and | X_{C} | = 20 Ω, connected across an A.C. supply of 200 V rms. The rms voltage across the capacitor is
100 ∠ 45
400 ∠ -90°
400 ∠ +90°
100 ∠ -45
⇒ An one sided abrupt junction has 10^{21}/m^{3} of dopants on the lightly doped side, zero bias voltage and a built-in potential of 0.2 V. The depletion width of abrupt junction.(q = 1.6 x 10^{-19} C, ε_{r} =16, ε_{0} = 8.87 x 10^{-12} F/m) is
0.036 nm
0.6 μm
3 mm
1.5 mm
⇒ Consider the following statements:
1 only
1, 3 and 4
1, 2 and 4
2 and 3 only
⇒ Over which frequency range the effect of atmospheric noise is significant?
Over 35 MHz
Below 30 MHz
Between 30 MHz and 100 MHz
Between 100 MHz and 150 MHz
⇒ A cascade amplifier will have higher cut off frequency
equal to that of single stage amplifier
less than that of single stage amplifier
more than that of single stage amplifier
none of these
⇒ The circuit in figure is switched on at t = 0. At any time t, i(t3 + 3e^{-1}
6 - 3e^{-1}
3 - 3e^{-t}
6 - 6e^{-1}
⇒ What is the frequency of pulse at the points a, b, c in the circ
3 MHz
7.8 KHz
10 KHz
1 MHz
⇒ To draw dc equivalent circuit for a CE amplifier circuit we should
Reduce all ac sources to zero
Open all capacitors
Reduce all ac sources to zero and open all capacitors
Reduce all ac sources to zero and short all capacitors
⇒ For the two port of figure, z_{2226/7 Ω6/7 Ω2/3 Ω1 Ω}
⇒ Calculate the stability factor and change in I_{C} from 25°C to 100°C for, β = 50, R_{B}/ R_{E} = 250, ΔI_{C0} = 19.9 nA for emitter bias configuration.
42.53, 0.85 μA
40.91, 0.58 μA
40.91, 0.58 μA
41.10, 0.39 μA
⇒ The minority carrier life time and diffusion constant in a semiconductor material are respectively 100 microsecond and 100 cm^{2}/sec. The diffusion length is
0.1 cm
0.01 cm
0.0141 cm
1 cm
⇒ An R-C coupled amplifier has mid-frequency gain of 200 and a frequency response from 100 Hz to 20 kHz. A negative feedback network with β = 0.2 is incorporated into the amplifier circuit, the Bandwidth will be
50 kHz
20 kHz
100 kHz
infinite
⇒ A network contains only independent current source and resistors. If the values of all resistors are doubled, the value of the node voltage
will become half
will remain unchange
will become one third
cannot be determined unless the circuit configuration and the values of the resistors are known
⇒ The electrical energy required to heat a bucket of water to a certain temperature is 2 kWh. If heat losses, are 25%, the energy input is
2.67 kWh
3 kWh
2.5 kWh
3.5 kWh
⇒ When deflecting torque and braking torque in an energy meter are zero,
the disc rotates at steady speed
the disc is stationary
the disc accelerates
the disc retards
⇒ Which of the following theorems is a manifestation of law of conservation of energy?
Tellegen's theorem
Reciprocity theorem
Thevenin's theorem
Norton's theorem
⇒ A low noise device is most important
at front end of equipment
in the last stage of equipment
in the middle stages of equipment
both (b) and (c)
⇒ A resistance of 5 ohms is connected in one branch of a network. The current in this branch is 2.2. A. If the resistance is increased to 7.5 Ω, the remaining circuit being the same, the current in this branch will be
2.2 A
less than 2.2 A
2.2 A or less than 2.2 A
2.2 A or less or more than 2.2 A
⇒ What is an advantage of an electronic voltmeter over a non-electronic voltmeter?
Low power consumption
Low input impedance
The ability to measure wide ranges of voltages and resistance
Large portability
⇒ The sum of 1110101_{2} and 11011_{2} in decimal form will be
65
75
85
95
⇒ For the system of the given figure |G(jω)| = 0 dB at &omeg
0
1 rad/sec.
∞
2.38 rad/sec.
⇒
Assertion (A): The velocity factor of a line is the ratio of wave velocity on the line to speed of light.
Reason (R): If the conductors of a line are immersed in a non magnetic insulating liquid, the wave velocity increases.
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
A is wrong but R is correct
⇒
Match the following:
List I (Signal) | List II (Value) | ||
---|---|---|---|
A. | AM | 1. | 0 0.5 |
B. | DSB - SC | 2. | 1 |
C. | SSB | 3. | 2 |
D. | FM (β = 2) | 4. | 16 |
E. | FM (β = 5) | 5. | 8 |
A-1, B-3, C-2, D-5, E-4
A-3, B-3, C-1, D-5, E-4
A-2, B-1, C-4, D-5, E-5
A-4, B-2, C-5, D-3, E-1
⇒ The current in a p-n junction diode with V volts applied in p region relative to n region (where I_{0} is reverse saturation current, m is ideality factor, k is Boltzmann's constant, T is absolute temp and q is charge on electron) is
I_{0} (e^{-qV/mkT} - 1)
I_{0} e^{-qV/mkT}
I_{0} (e^{qV/mkT})
I_{0} (e^{qV/mkT} - 1)
⇒ The resistance of a superconductor is
low
very low
very very low
zero
⇒ Which of the following quantities cannot be measured/determined using Hall effect?
Type of semiconductor (p or n)
Mobility of charge carriers
Diffusion constant
Carrier concentration
⇒ Multiplex techniques are used for
low density communications
low density point-to-point communications
high-density point-to-point communications
all of the above
⇒ The voltage e_{o} indicated in the figure has been measured by an ideal voltmeter. Which of the following can be calcula
Bias current of inverting input only
Bias current of inverting and non-inverting inputs only
Input offset current only
Both the bias currents and the I/P offset current
⇒ Which of the following closely represents the resistance-temperature characteristics of thermistor?
R_{T} = a R_{0} e^{b/t}
R_{T} = a R_{0} E^{-b/t}
R_{T} = - a R_{0} e^{-b/t}
R_{T} = - R_{0} e^{b/t}
⇒ Which of the following statements defines a full adder?
It adds two binary digits and produces their SUM and CARRY
It adds three inputs (two binary digits and a carry) and produces their SUM and CARRY
It has two inputs and two outputs
None of the above
⇒ A series LCR circuit consisting of R = 20 Ω, | X_{L} | = 20 Ω and | X_{C} | = 20 Ω, connected across an A.C. supply of 200 V rms. The rms voltage across the capacitor is
100 ∠ 45
400 ∠ -90°
400 ∠ +90°
100 ∠ -45
⇒ An one sided abrupt junction has 10^{21}/m^{3} of dopants on the lightly doped side, zero bias voltage and a built-in potential of 0.2 V. The depletion width of abrupt junction.(q = 1.6 x 10^{-19} C, ε_{r} =16, ε_{0} = 8.87 x 10^{-12} F/m) is
0.036 nm
0.6 μm
3 mm
1.5 mm
⇒ Consider the following statements:
- A flip-flop is used to store 1-bit of information.
- Race-around condition occurs in a J-K flip-flop when both the inputs are 1.
- Master-slave configuration is used in flip-flops to store 2-bits of information
- A transparent latch consists of a D-type flip-flop.
1 only
1, 3 and 4
1, 2 and 4
2 and 3 only
⇒ Over which frequency range the effect of atmospheric noise is significant?
Over 35 MHz
Below 30 MHz
Between 30 MHz and 100 MHz
Between 100 MHz and 150 MHz
⇒ A cascade amplifier will have higher cut off frequency
equal to that of single stage amplifier
less than that of single stage amplifier
more than that of single stage amplifier
none of these