Made Easy Online Test Series Mu -3
May 6, 2017 | Author: Aayush Patidar | Category: N/A
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CBT 2016
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Test 25
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Q.1 Consider a scalar field V given in cylindrical coordinates (ρ, φ, z). V = 5ρ2 sin 2φ Laplacian of V at
is
a. 5 b.
0
c. 10 d. –10
Attempt
Correct
Correct Ans.
FAQ?
b
Have any doubt?
Solution
Q.2 Magnetic flux density
and magnetic vector potential
are related by
a. b. c. d.
Attempt
Correct
Correct Ans.
FAQ?
d
Have any doubt?
Solution
Q.3 The electric field vector in free space is given by The displacement current density vector
is given by
a. b. c. d.
Not Attempt
Correct Ans.
d
FAQ?
Have any doubt?
Solution
Q.4 Consider an infinite length lossless transmission line with characteristic impedance Z0 = 50 Ω. If the line is terminated with a load ZL = 75 Ω, then the ratio maximum input impedance to the minimum input impedance on the line is given by
a.
b. c.
d.
Attempt
Correct
Correct Ans.
FAQ?
c
Have any doubt?
Solution
Q.5 The magnetic field intensity vector of a plane wave propagating in a lossless medium is given by The direction of rate of energy flow is in a. − direction
b.
direction
c.
d.
Attempt
direction direction
Incorrect
Your Ans.
FAQ?
c
Correct Ans.
d
Have any doubt?
Solution
Q.6 Which of the following is/are true about accumulator of INTEL 8085. (i) Result of all arithmetic and logical instruction is stored in accumulator. (ii) One of the operand for arithmetic and logical instruction must be in accumulator. (iii) To move data from one memory location to another data must pass through accumulator. a.
(i) and (ii)
b. (ii) and (iii) c. (iii) and (i) d.
None of these
Attempt
Incorrect
Your Ans.
FAQ?
a
Correct Ans.
d
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Solution
Q.7 Which of the following statements is not true regarding INTEL 8085. a. Stack is a part of memory interfaced with microprocessor. b. Program counter is synchronous counter. c.
Only HL pair can be used as memory pointer.
d. Maximum Tstates in an instruction cycle are 6.
Attempt
Correct
Correct Ans.
FAQ?
c
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Solution
Q.8 After execution of last arithmetic instruction of a certain program, the content of flag register was found to be 95 H. The contents of accumulator can be a. 92 H b.
95 H
c.
C2 H
d. 59 H
Attempt
Incorrect
Your Ans.
FAQ?
c
Correct Ans.
b
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Solution
Q.9 Which of the following statement is incorrect regarding INTEL 8085? a. Read/Write memory is used for temporary storage. b. Carry flag is modified in RAL and RLC both. c.
Logical instructions do not affect the carry flag.
d.
When RET instruction is executed stack pointer is incremented by 2.
Attempt
Incorrect
Your Ans.
FAQ?
d
Correct Ans.
c
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Solution
Q.10 The electric field vector in spherical coordinates (r, θ, φ) is given by
The potential of point
with respect to (r = 4
m, θ = π, φ = π) is _______ V.
Attempt
Incorrect
Your Ans.
FAQ?
0
Correct Ans.
4
Have any doubt?
Solution
Q.11 In INTEL 8085, while executing a program non maskable interrupt occurs. The data present on data line is _______ H
Attempt
Incorrect
Your Ans.
FAQ?
00
Correct Ans.
Have any doubt?
24 Solution
Q.12 Spherical surfaces at r = 2 and 4 m carry uniform surface charge densities of 20 nC/m2 and 4 nC/m2 respectively. The radial electric flux density at r = 3 m is given by ________ nC/m2 .
Attempt
Incorrect
Your Ans.
FAQ?
6
Correct Ans.
8.90 (8.50 9.20) Solution
Have any doubt?
Q.13 Consider three lossless transmission lines as shown in the figure. All the lines have characteristic impedance Z0 = 50 Ω. The input impedance Zin looking into line 3 is given by ________ Ω
Not Attempt
Correct Ans.
100
FAQ?
Have any doubt?
Solution
Q.14 A rectangular waveguide with dimensions 2 cm × 4 cm is filled with a dielectric material (∈r = 4, μr = 1). The largest wavelength that can be propagated through the guide is _____ cm.
Not Attempt
Correct Ans.
8
FAQ?
Have any doubt?
Solution
Q.15 A read write memory chip has a capacity of 32 M bytes. If the memory chip is having equal number address lines and data lines, then minimum number of data lines are _____.
Attempt
Incorrect
Your Ans.
FAQ?
16
Correct Ans.
Have any doubt?
14 Solution
Q.16 Consider the following assembly language program in INTEL 8085. XRA A LXI B, 000F H LOOP DCX B ANI FF H JC LOOP HLT While execution of above program the loop will be executed _____ times.
Attempt
Q.17
Correct
Correct Ans.
FAQ?
1
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Solution
When a right circularly polarized wave is incident on a perfect conductor at 45° angle, the reflected wave is a.
Left circularly polarized
b. Right circularly polarized c. Lineary polarized d.
elliptically polarized
Attempt
Incorrect
Your Ans.
FAQ?
d
Correct Ans.
a
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Solution
Q.18 A medium is divided into two regions I and II about z = 0 plane as shown in the figure below.
If the interface carries surface current
and magnetic flux density in region II
the magnetic flux density in region I,
is given by
a.
b.
c.
d.
Not Attempt
Correct Ans.
b
FAQ?
Have any doubt?
Solution
Q.19 A nonmagnetic medium has an intrinsic impedance complex permittivity of the medium is given by ∈c = (x + jy) × 10–12 F/m,
. If the
then the values of x, y are respectively given by a. 8.84, – 15.3 b.
10.91, –18.9
c. 14.3, –24.8 d. 1.091, –1.89
Not Attempt
Correct Ans.
b
FAQ?
Have any doubt?
Solution
Q.20 An electromagnetic wave is travelling at an angle θi with respect to the z axis within a medium with dielectric permittivity ∈ and magnetic permeability μ. The magnetic field is given as
The wavelength (in meters) and θi (in degrees) are respectively given by a. 1, 60° b. 2, 30° c.
1, 30°
d.
2, 60°
Attempt
Incorrect
Your Ans.
FAQ?
d
Correct Ans.
c
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Solution
Q.21 A 200 × 106 rad/s uniform plane with electric field vector v/m is propagating in a lossless dielectric medium (∈r = 4, μr = 1). If the wave enters free space normally at z = 0, the power density for z > 0 is given by a. 176.8 mW/m2 b.
235.8 mW/m2
c. 117.9 mW/m2 d. 471.6 mW/m2
Not Attempt
Correct Ans.
b
FAQ?
Have any doubt?
Solution
Q.22 If the HLT instruction is executed in INTEL 8085 then a.
the microprocessor enters into halt state and buses are tristated
b. the microprocessor is disconnected from the system bus till the reset is pressed. c.
the microprocessor halts the execution and load 0000 H to the program counter.
d. None of these
Attempt
Incorrect
Your Ans.
FAQ?
c
Correct Ans.
a
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Solution
Q.23 Consider the following program to be executed in INTEL 8085 states from 3000 H LXI SP, 4000 H PUSH H PUSH D CALL 3050 H POP H HLT After execution of HLT instruction, the program counter and stack pointer contains respectively a. 300A H, 3FFC H b. 3009 H, 3FFC H c.
300A H, 3FFE H
d.
3009 H, 3FFE H
Attempt
Incorrect
Your Ans.
FAQ?
d
Correct Ans.
c
Have any doubt?
Solution
Q.24 Consider the following statements (i) If the 8085 is interrupted while executing 3 byte instruction (assuming interrupt is enabled), the processor will acknowledge the interrupt request immediately even before the completion of instruction. (ii) Instruction RIM is used to disable the interrupts RST 7.5, RST 6.5, RST 5.5. (iii) When an 8085 system is reset, all the interrupts including TRAP are disabled. Which of the above statements is/are incorrect.
a.
(i) and (ii)
b. (i) and (iii) c. (iii) and (ii) d.
Attempt
All of the above
Incorrect
Your Ans.
FAQ?
a
Correct Ans.
d
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Solution
Q.25 Consider the assembly language program given below (1) MVI A, 8F H (2) SUI CA H (3) JC DISPLAY (4) OUT PORT1 (5) HLT (6) DISPLAY: XRA A (7) OUT PORT1 (8) HLT If the above program is executed in 8085 then data displayed at PORT 1 and content of flag register is respectively. a. 00 H, i H b. C5 H, 95 H c.
C5 H, 94 H
d.
00 H, 94 H
Attempt
Incorrect
Your Ans.
FAQ?
d
Correct Ans.
c
Have any doubt?
Solution
Q.26 Consider a parallel plate capacitor (shown in figure) which is sandwich of two dielectric media of the same thickness (d = 1 cm) and plate area A of 10 cm × 10 cm. Neglecting the field outside the capacitor, the electric flux density at the dielectric interface is ________ nC/m2
Attempt Incorrect 21.25 (21.15 21.35)
Q.27
Your Ans.
FAQ?
0.021
Correct Ans.
Have any doubt?
Solution
In a certain material, at a frequency 90 GHz, the magnitudes of conduction current density and displacement current densities are equal. If the medium has conductivity of 10 (Ωm)–1 , the relative permittivity of the medium is _________ .
Not Attempt
Correct Ans.
1.99 (1.60 2.15)
FAQ?
Have any doubt?
Solution
Q.28 Given a vector field
The value of
in cartesian coordinates
[where S is the surface of the cube defined by 0 ≤ x
≤ 2, 0 ≤ y ≤ 2,0 ≤ z ≤ 2] is given by ________.
Attempt
Incorrect
Your Ans.
FAQ?
6
Correct Ans.
24
Have any doubt?
Solution
Q.29 The magnetic field component of a plane wave in a lossless dielectric (μr = 1) is
The wave impedance η is given by ________ Ω.
Not Attempt
Correct Ans.
157.90 (157.50 158.50)
FAQ?
Have any doubt?
Solution
Q.30 A uniform plane wave propagating in free space is incident on a lossless dielectric (∈r = 4, μr = 1) is totally transmitted. The angle of transmission is given by _________ degrees.
Not Attempt
Correct Ans.
26.56 (26.00 27.00)
FAQ?
Have any doubt?
Q.31 Consider the following program for INTEL 8085.
Solution
After execution of program the decimal equivalent of data present at 2450 H is _____ .
Attempt
Incorrect
Your Ans.
FAQ?
2504
Correct Ans.
Have any doubt?
44 Solution
Q.32 If the clock frequency of a microprocessor is 5 MHz. Then the time required to execute PUSH B instruction is _____ μsec.
Attempt Incorrect 2.40 (2.00 3.00)
Your Ans.
FAQ?
3.2
Correct Ans.
Have any doubt?
Solution
Q.33 Consider the following assembly language program MVI A, AC H MVI B, FF H XRA B ANI FF H DAA HLT The program was executed in 8085, after execution of HLT the decimal equivalent of data present in accumulator is _____.
Not Attempt
Correct Ans.
89
FAQ?
Have any doubt?
Solution
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