Users Also Read
MCQ's Search Engine
Electrical Engineering
Mechanical Engineering
Civil Engineering
Automobile Engineering
Chemical Engineering
Computer Engineering
Electronics Engineering
Medical Science Engg
A dc separately excited motor has constant field current. The armature is fed from a single phase supply through a full converter. When a = 0, speed is 500 rpm. If a = 45°, the speed is likely to be | |
A. | about 350 rpm [Wrong Answer] |
B. | about 250 rpm [Wrong Answer] |
C. | about 175 rpm [Wrong Answer] |
D. | about 125 rpm [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 :
⇒ An 8 bit wide 4 word sequential memory has
Eight 4 bit shift registers
Eight 8 bit shift registers
Four 8 bit shift registers
Foui 4 bit shift registers
⇒ If f_{h}(t) is Hilbert transform of f(t), then Hilbert transform of f_{h}(t) is
-f(t)
+f(t)
f^{2}(t)
f(t)
⇒ Consider the following statements:
1, 2, 3
1, 3, 4
1, 2, 4
2, 3, 4
⇒ In one's complement 8 bit representation 11111111 represents
0
0
1
-1
⇒ The function shown in figure, can represent a probability density function for A ________
A = 1/4
A = 1/6
A = 1/8
A = 1/2
⇒ In the circuit of figure the current through 5 Ω resistance at t = &infin
0.166666666666667
2.5 A
3.1 A
0
⇒ A mod-10 counter can divide the clock frequency by a factor of
10
20
210
102
⇒
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
⇒ For 0 < M < 1, the centres of M circle lie to the right of origin.
TRUE
FALSE
⇒ When a transistor is to be at a temperature above 25°C
smaller heat sink be provided
maximum power rating be derated
biasing circuit must be strengthened
earth connections must be connected through a resistor
⇒ Loop antennas are mostly employed for direction finding (DF) purposes because they are small and hence portable.
TRUE
FALSE
⇒ End fire array is called a linear resonant dipole array.
TRUE
FALSE
⇒ If a RAM has 34 bits in its MAR and 16 bits in its MDR, then its capacity will be
32 GB
16 GB
32 MB
16 MB
⇒ As the number of flip flops are increased, the total propagation delay of
ripple counter increases but that of synchronous counter remains the same
both ripple and synchronous counters increase
both ripple and synchronous counters remain the same
ripple counter remains the same but that of synchronous counter increases
⇒ A noiseless 3 kHz channel can't transmit binary bit at the rate
12000 bps
1000 bps
6000 bps
3000 bps
⇒ The given figure shows a control system. The maximum value of gain for which the system is stabl
3
3
4
5
⇒ A sinusoidal signal is measured by CRO. The scale is set at 4 mV/cm. If vertical distance between positive and negative peaks is 6 cm, the peak value of ac signal is
6 mV
12 mV
24 mV
3 mV
⇒ A silicon controlled switch has :
2 leads
3 leads
4 leads
5 leads
⇒ The conductivity of a semiconductor crystal due to any current carrier is not proportional to
mobility of the carrier
effective density of states in the conduction band
electronic charge
surface states in the semiconductor
⇒ The changes in ambient temperature affect the open loop gain of amplifier.
TRUE
FALSE
⇒
A-1, B-2, C-3, D-4
A-2, B-1, C-3, D-4
A-3, B-4, C-2, D-1
A-4, B-3, C-2, D-1
⇒ The carrier mobility in a semiconductor is 0.4 m^{2}/Vs. Its diffusion constant at 300k will be (in m^{2}/s).
0.43
0.16
0.04
0.01
⇒
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
⇒ For the circuit in figure, fed by a unit step voltage, v_{c1 - e-t/RCe-t/RCet/RC1}
⇒ A vertical loop antenna, like a horizontal dipole, is vertically polarised.
TRUE
FALSE
⇒ In an ac network, Thevenin's impedance and Norton's impedance are
always the same
generally the same
sometimes the same
always different
⇒ A uniform wave have components
in the perpendicular direction E existing while H is zero
in the direction of propagation E existing while H is zero
E and H are zero in direction perpendicular to direction of propagation
E and H existing only in direction perpendicular to direction of propagation
⇒ A microwave link uses only line-of-sight propagation.
TRUE
FALSE
⇒ The two pressure coils in a single phase power factor meter of turns
the same dimension and the same numbers of turns
the same dimension but different number of turns
different dimension and different numbers of turns
different dimension but the same numbers of turns
⇒ Stray capacitance is important at low frequencies.
TRUE
FALSE
⇒ An 8 bit wide 4 word sequential memory has
Eight 4 bit shift registers
Eight 8 bit shift registers
Four 8 bit shift registers
Foui 4 bit shift registers
⇒ If f_{h}(t) is Hilbert transform of f(t), then Hilbert transform of f_{h}(t) is
-f(t)
+f(t)
f^{2}(t)
f(t)
⇒ Consider the following statements:
- Race around condition can occur in JK flip flop when both inputs are 1
- A flip flop is used to store one bit of information
- A transparent latch is a D type flip flop
- Master slave flip flop is used to store two bits of information
1, 2, 3
1, 3, 4
1, 2, 4
2, 3, 4
⇒ In one's complement 8 bit representation 11111111 represents
0
0
1
-1
⇒ The function shown in figure, can represent a probability density function for A ________
A = 1/4
A = 1/6
A = 1/8
A = 1/2
⇒ In the circuit of figure the current through 5 Ω resistance at t = &infin
0.166666666666667
2.5 A
3.1 A
0
⇒ A mod-10 counter can divide the clock frequency by a factor of
10
20
210
102
⇒
Assertion (A): A coaxial line is a non-radiating line.
Reason (R): In a coaxial line the electric and magnetic fields are confined to the region between the concentric conductors.
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
⇒ For 0 < M < 1, the centres of M circle lie to the right of origin.
TRUE
FALSE
⇒ When a transistor is to be at a temperature above 25°C
smaller heat sink be provided
maximum power rating be derated
biasing circuit must be strengthened
earth connections must be connected through a resistor
⇒ Loop antennas are mostly employed for direction finding (DF) purposes because they are small and hence portable.
TRUE
FALSE
⇒ End fire array is called a linear resonant dipole array.
TRUE
FALSE
⇒ If a RAM has 34 bits in its MAR and 16 bits in its MDR, then its capacity will be
32 GB
16 GB
32 MB
16 MB
⇒ As the number of flip flops are increased, the total propagation delay of
ripple counter increases but that of synchronous counter remains the same
both ripple and synchronous counters increase
both ripple and synchronous counters remain the same
ripple counter remains the same but that of synchronous counter increases
⇒ A noiseless 3 kHz channel can't transmit binary bit at the rate
12000 bps
1000 bps
6000 bps
3000 bps
⇒ The given figure shows a control system. The maximum value of gain for which the system is stabl
3
3
4
5
⇒ A sinusoidal signal is measured by CRO. The scale is set at 4 mV/cm. If vertical distance between positive and negative peaks is 6 cm, the peak value of ac signal is
6 mV
12 mV
24 mV
3 mV
⇒ A silicon controlled switch has :
2 leads
3 leads
4 leads
5 leads
⇒ The conductivity of a semiconductor crystal due to any current carrier is not proportional to
mobility of the carrier
effective density of states in the conduction band
electronic charge
surface states in the semiconductor
⇒ The changes in ambient temperature affect the open loop gain of amplifier.
TRUE
FALSE
⇒
Match the following:
List I | List II | ||
---|---|---|---|
A. | Darlington amplifier | 1. | A circuit using pnp and npn transistors |
B. | CB amplifier | 2. | A CS amplifier driving a CG amplifier |
C. | Cascade amplifier | 3. | A circuit with over-all voltage gain close to 1 and very large input impedance |
D. | Complementary symmetry amplifier | 4. | A circuit with low input impedance |
A-1, B-2, C-3, D-4
A-2, B-1, C-3, D-4
A-3, B-4, C-2, D-1
A-4, B-3, C-2, D-1
⇒ The carrier mobility in a semiconductor is 0.4 m^{2}/Vs. Its diffusion constant at 300k will be (in m^{2}/s).
0.43
0.16
0.04
0.01
⇒
Assertion (A): If minimum phase system has a gain margin of 8 dB and phase margin of 21°, the system is stable.
Reason (R): For a minimum phase system both GM and PM must be positive for the system to be stable.
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
⇒ For the circuit in figure, fed by a unit step voltage, v_{c1 - e-t/RCe-t/RCet/RC1}
⇒ A vertical loop antenna, like a horizontal dipole, is vertically polarised.
TRUE
FALSE
⇒ In an ac network, Thevenin's impedance and Norton's impedance are
always the same
generally the same
sometimes the same
always different
⇒ A uniform wave have components
in the perpendicular direction E existing while H is zero
in the direction of propagation E existing while H is zero
E and H are zero in direction perpendicular to direction of propagation
E and H existing only in direction perpendicular to direction of propagation
⇒ A microwave link uses only line-of-sight propagation.
TRUE
FALSE
⇒ The two pressure coils in a single phase power factor meter of turns
the same dimension and the same numbers of turns
the same dimension but different number of turns
different dimension and different numbers of turns
different dimension but the same numbers of turns
⇒ Stray capacitance is important at low frequencies.
TRUE
FALSE