Users Also Read
MCQ's Search Engine
Electrical Engineering
Mechanical Engineering
Civil Engineering
Automobile Engineering
Chemical Engineering
Computer Engineering
Electronics Engineering
Medical Science Engg
Hall effect is observed in a specimen when it is carrying current and is placed in a magnetic field. The resulting electric field inside the speciment will be in  
A.  direction normal to both current and magnetic field [Correct Answer] 
B.  the direction of current [Wrong Answer] 
C.  direction antiparallel to magnetic field [Wrong Answer] 
D.  an arbitrary direction depend upon conductivity [Wrong Answer] 
View Answer
Explanation:
Answer : A Discuss it below : !! OOPS Login [Click here] is required to post your answer/result 
Also Read Similar Questions Below :
⇒ If a sample of Ge and a sample of Si have the same impurity density are kept at room temperature
both will have equal value of resistivity
both will have equal  ve of resistivity
resistivity of germanium will be higher than that of silicon
resistivity of silicon will be higher than of Ge
⇒ The expression Y (A, B, C) = ∑m (1, 3, 5, 6) is to realized using a multiplexer. Then
use 8 : 1 multiplexer and ground input lines 1, 3, 5, 6
use 8 : 1 multiplexer and ground input lines 0, 2, 4, 7
use 8 : 1 multiplexer and ground input lines 0, 1, 2, 3
use 8 : 1 multiplexer and ground input lines 4, 5, 6, 7
⇒ Low frequency boost can be easily compensated by
attenuating the frequencies from 0 to 1.25 MHz
using an appropriate deemphasis circuit in the receiver
using an appropriate preemphasis circuit in the transmitter
none
⇒ Find the electric charge required on the earth and moon to balance their gravitational attraction if the charge on the earth is 10 times that on the moon.
1.73 TC
17.3 GC
17.3 TC
1.73 GC
⇒ The number of programmable 16 bit registers of 6800 are
2
3
4
5
⇒ A moving iron instrument can be used for
dc only
ac only
both dc and ac
dc and high frequency ac
⇒ The first critical frequency nearest the origin of the complex frequency plane for an RL driving point impedance will be
a zero in left half plane
a zero in right half plane
a pole in left half plane
a pole or zero in left half plane
⇒ The Kmap for a Boolean function is shown in figure. The number of essential prime implicants for this functio
4
5
6
8
⇒ The circumference of an electron orbit is equal to integer times the wavelength of electron.
TRUE
FALSE
⇒ A half wave diode rectifier and full wave diode bridge rectifier both have an input frequency of 50 Hz. The frequencies of outputs respectively are
100 Hz and 50 Hz
50 Hz and 100 Hz
100 Hz each
50 Hz each
⇒ A transmission line has characteristics impedance of (75 + j 0.01) Ω and is terminated in a load impedance of (70 + j 50) Ω. The reflection coefficient will be
0.08 + j 0.32
0.32 + j 1.38
0.70  j 2.97
1.1 + j 0.32
⇒ For a symmetrical network
z_{11} = z_{22}
z_{12} = z_{21}
z_{11} z_{22} and z_{12} = z_{21}
z_{11} z_{12}  z_{12}^{2} = 0
⇒ An amplifier without feedback has a voltage gain of 50, input resistance of 1 kΩ and output resistance of 2.5 kΩ. The input resistance of the current shunt ve feedback amplifier using the above amplifier with a feedback factor of 0.2 is
1/11 kΩ
1/5 kΩ
5 kW
11 kW
⇒ In which of the following logical group instructions of 8085 do the contents of accumulator remain unchanged?
⇒ It is known that noise phase modulates the FM wave. As the noise side band frequency approaches the carrier frequency, the noise amplitude
will increase
will decrease
will remain constant
will reduce to negligible value
⇒ The power requirement of a RADAR used in military operations is
a few watts
about 500 W
about 2000 W
a few megawatts
⇒
A3, B1, C4, D2
A2, B1, C4, D2
A3, B2, C1, D4
A4, B3, C1, D2
⇒ The mean free path of conduction electrons in copper is about 4 x 10^{8} m. For a copper block, find the electric field which can give, on an average, 1 eV energy to a conduction electron
2.62 x 10^{7} V/m
2.64 x 10^{7} V/m
2.5 x 10^{7} V/m
2.58 x 10^{7} V/m
⇒ A video monitor is exactly similar to TV receiver.
TRUE
FALSE
⇒ Minimum no. of 2 I/P NAND gate required to implement the Boolean function Z = ABC, assuming that A, B and C are available is
2
3
5
6
⇒ The spins in a ferrimagnetic material are
all aligned parallel
partially aligned antiparallel without exactly cancelling out sublattice magnetisation
randomly oriented
all aligned antiparallel such that the sublattice cancels out exactly
⇒ Which opamp circuit uses a capacitor in series with input and resistance in feedback path?
Differentiating amplifier
Integrating amplifier
Logarithmic amplifier
None of the above
⇒ In a circular waveguide the dominant mode is
TE_{01}
TE_{11}
TE_{20}
TE_{21}
⇒ A counter has N flip flops. The total number of states are
N
2 N
2^{N}
4 N
⇒ In a CE amplifier it is desired that the signal should be able to swing equally in both directions. Then the Q point should be
at the centre of ac load line
at the centre of dc load line
at the centre of collector voltage
at the centre of collector current
⇒ The number of memory locations in which 14 address bits can access is
1024
2048
4096
16384
⇒ In Java which operator can be used even if there is a single operand
+

*
%
⇒ A Shockley diode can be used
in place of SCR
as a trigger switch for SCR
in place of UJT
both in place of SCR and as a trigger switch for SCR
⇒ Purpose of antenna is
to transmit and receive energy
to convert EM into electrical
to convert electrical into EM
all of the above
⇒ In a 3 phase semiconverter, the dc output voltage for a certain firing angle is 50% of the maximum possible value. The firing angle is
30°
60°
90°
120°
⇒ If a sample of Ge and a sample of Si have the same impurity density are kept at room temperature
both will have equal value of resistivity
both will have equal  ve of resistivity
resistivity of germanium will be higher than that of silicon
resistivity of silicon will be higher than of Ge
⇒ The expression Y (A, B, C) = ∑m (1, 3, 5, 6) is to realized using a multiplexer. Then
use 8 : 1 multiplexer and ground input lines 1, 3, 5, 6
use 8 : 1 multiplexer and ground input lines 0, 2, 4, 7
use 8 : 1 multiplexer and ground input lines 0, 1, 2, 3
use 8 : 1 multiplexer and ground input lines 4, 5, 6, 7
⇒ Low frequency boost can be easily compensated by
attenuating the frequencies from 0 to 1.25 MHz
using an appropriate deemphasis circuit in the receiver
using an appropriate preemphasis circuit in the transmitter
none
⇒ Find the electric charge required on the earth and moon to balance their gravitational attraction if the charge on the earth is 10 times that on the moon.
1.73 TC
17.3 GC
17.3 TC
1.73 GC
⇒ The number of programmable 16 bit registers of 6800 are
2
3
4
5
⇒ A moving iron instrument can be used for
dc only
ac only
both dc and ac
dc and high frequency ac
⇒ The first critical frequency nearest the origin of the complex frequency plane for an RL driving point impedance will be
a zero in left half plane
a zero in right half plane
a pole in left half plane
a pole or zero in left half plane
⇒ The Kmap for a Boolean function is shown in figure. The number of essential prime implicants for this functio
4
5
6
8
⇒ The circumference of an electron orbit is equal to integer times the wavelength of electron.
TRUE
FALSE
⇒ A half wave diode rectifier and full wave diode bridge rectifier both have an input frequency of 50 Hz. The frequencies of outputs respectively are
100 Hz and 50 Hz
50 Hz and 100 Hz
100 Hz each
50 Hz each
⇒ A transmission line has characteristics impedance of (75 + j 0.01) Ω and is terminated in a load impedance of (70 + j 50) Ω. The reflection coefficient will be
0.08 + j 0.32
0.32 + j 1.38
0.70  j 2.97
1.1 + j 0.32
⇒ For a symmetrical network
z_{11} = z_{22}
z_{12} = z_{21}
z_{11} z_{22} and z_{12} = z_{21}
z_{11} z_{12}  z_{12}^{2} = 0
⇒ An amplifier without feedback has a voltage gain of 50, input resistance of 1 kΩ and output resistance of 2.5 kΩ. The input resistance of the current shunt ve feedback amplifier using the above amplifier with a feedback factor of 0.2 is
1/11 kΩ
1/5 kΩ
5 kW
11 kW
⇒ In which of the following logical group instructions of 8085 do the contents of accumulator remain unchanged?
ORA r
ORA M
ORI data
CMP r
⇒ It is known that noise phase modulates the FM wave. As the noise side band frequency approaches the carrier frequency, the noise amplitude
will increase
will decrease
will remain constant
will reduce to negligible value
⇒ The power requirement of a RADAR used in military operations is
a few watts
about 500 W
about 2000 W
a few megawatts
⇒
Match the following:
List I  List II  

A.  D Layer  1.  110 km 
B.  E layer  2.  10 km 
C.  F layer  3.  60 km 
D.  Troposphere  4.  350 km 
A3, B1, C4, D2
A2, B1, C4, D2
A3, B2, C1, D4
A4, B3, C1, D2
⇒ The mean free path of conduction electrons in copper is about 4 x 10^{8} m. For a copper block, find the electric field which can give, on an average, 1 eV energy to a conduction electron
2.62 x 10^{7} V/m
2.64 x 10^{7} V/m
2.5 x 10^{7} V/m
2.58 x 10^{7} V/m
⇒ A video monitor is exactly similar to TV receiver.
TRUE
FALSE
⇒ Minimum no. of 2 I/P NAND gate required to implement the Boolean function Z = ABC, assuming that A, B and C are available is
2
3
5
6
⇒ The spins in a ferrimagnetic material are
all aligned parallel
partially aligned antiparallel without exactly cancelling out sublattice magnetisation
randomly oriented
all aligned antiparallel such that the sublattice cancels out exactly
⇒ Which opamp circuit uses a capacitor in series with input and resistance in feedback path?
Differentiating amplifier
Integrating amplifier
Logarithmic amplifier
None of the above
⇒ In a circular waveguide the dominant mode is
TE_{01}
TE_{11}
TE_{20}
TE_{21}
⇒ A counter has N flip flops. The total number of states are
N
2 N
2^{N}
4 N
⇒ In a CE amplifier it is desired that the signal should be able to swing equally in both directions. Then the Q point should be
at the centre of ac load line
at the centre of dc load line
at the centre of collector voltage
at the centre of collector current
⇒ The number of memory locations in which 14 address bits can access is
1024
2048
4096
16384
⇒ In Java which operator can be used even if there is a single operand
+

*
%
⇒ A Shockley diode can be used
in place of SCR
as a trigger switch for SCR
in place of UJT
both in place of SCR and as a trigger switch for SCR
⇒ Purpose of antenna is
to transmit and receive energy
to convert EM into electrical
to convert electrical into EM
all of the above
⇒ In a 3 phase semiconverter, the dc output voltage for a certain firing angle is 50% of the maximum possible value. The firing angle is
30°
60°
90°
120°