BASIC : MICROPROCESSORS & ELECTROMAGNETIC FIELDS - REPORTS

Devansh RaghuwanshiCourse: GATE+ESEElectrical Engineering (EE)

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Q. 1

Have any Doubt ? Solution VideoFAQWhich one of the following signals can be used to demultiplex the address bus and data bus of an 8085 microprocessor?

A

B

Solution :(c)

ALE (Address Latch Enable) is used to demultiplex the address bus and data bus.

C ALECorrect Option

D READY

QUESTION ANALYTICS

Q. 2

OVERALL ANALYSIS COMPARISON REPORT SOLUTION REPORT

ALL(33) CORRECT(0) INCORRECT(0) SKIPPED(33)

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Q. 2

Have any Doubt ? Solution VideoFAQThe addressing mode of the instruction “PUSH” is

A Direct Addressing Mode

B Register Addressing Mode

Solution :(c)

C Register Indirect Addressing ModeCorrect Option

D Implied Addressing Mode

QUESTION ANALYTICS

Q. 3

Have any Doubt ? Solution VideoFAQ

Consider the following program in an 8085 based system, along with the subroutine TEST:

After execution of the above program, the content of the accumulator will be equal to

A 02H

B FFHCorrect Option

Solution :(b)

C FEH

D 20H

QUESTION ANALYTICS

Q. 4

Have any Doubt ? Solution VideoFAQ

In an 8085 microprocessor, which one of the following is the correct sequence of the machine cycles for the execution of the“INR M” instruction?

A opcode fetch

B opcode fetch, memory read

C opcode fetch, memory write

Solution :(d)

“INR M” is a one byte instruction, so fetch. But memory content should be incremented and stored, so read and write are

D opcode fetch, memory read, memory writeCorrect Option

required.

QUESTION ANALYTICS

Q. 5

Have any Doubt ?FAQDuring the execution of “HLT” instruction in an 8085 microprocessor, which of the following flags will be effected?

A Carry flag, Sign flag

B Sign flag, Zero flag

C Auxiliary carry flag, Zero flag

Solution :(d)

D No flagsCorrect Option

QUESTION ANALYTICS

Q. 6

Have any Doubt ? Solution VideoFAQIf the initial address of a 4K × 8 memory is 4000H, then the address of the last byte will be equal to

A 3FFFH

B 4FFEH

Solution :(c)

C 4FFFHCorrect Option

D 5FFFH

QUESTION ANALYTICS

Q. 7

Have any Doubt ? Solution VideoFAQThe units of where is vector magnetic potential, is given by:

A

B

C

D

Correct Option

Solution :(d)

QUESTION ANALYTICS

Q. 8

Have any Doubt ? Solution VideoFAQ

The point is converted in cylindrical coordinates is given by:

A

B

C

D

Correct Option

Solution :(d)

QUESTION ANALYTICS

Q. 9

Have any Doubt ? Solution VideoFAQ

The values of constants a, b and c so that is irrotational, is given

by

Solution :(a)

A a = 4, b = 2, c = –1Correct Option

B a = 3, b = 2, c = 2

C a = 4, b = –2, c = 1

D a = 3, b = 2, c = –2

QUESTION ANALYTICS

Q. 10

Have any Doubt ? Solution VideoFAQ

The divergence of the following vector field at the given point is given by

Solution :(a)

A –1Correct Option

B 2

C –2

D 1

QUESTION ANALYTICS

Q. 11

Have any Doubt ?FAQ

The time required for the execution of the instruction “LDA 2017H” in an 8085 microprocessor operating with a clock frequencyof 2 MHz is _____ μsec.

Solution :6.50 (6.40 - 6.60)

6.50 (6.40 - 6.60)Correct Option

( )

QUESTION ANALYTICS

Q. 12

Have any Doubt ?FAQ

The total number of memory accesses involved (including op-code fetch) when an 8085 microprocessor executes theinstruction “LHLD 2017H” is ______.

Solution :5Total 5 memory accesses are required:

1. Opcode fetch 2. Memory read (to read 17H)

3. Memory read (to read 20H) 4. Memory read (to read data from 2017H)

5. Memory read (to read data from 2018H)

5Correct Option

QUESTION ANALYTICS

Q. 13

Have any Doubt ? Solution VideoFAQ

For x, y, z positive, let volume charge density; ρv = 40 xyz c/m3. The total charge contained within the region defined by:0 ≤ x, y,z ≤ 2 is given by ________ Coulombs.

320

Solution :320

320Correct Option

QUESTION ANALYTICS

Q. 14

Have any Doubt ? Solution VideoFAQ

Consider square loop of length ‘a’ through which a current of 2 Amp is passing in clockwise direction as shown in figure. The

magnetic field at the centre of square loop is given as; ________ A/m.

Solution :45.02 (44.70 - 45.30)

45.02 (44.70 - 45.30)Correct Option

QUESTION ANALYTICS

Q. 15

Have any Doubt ? Solution VideoFAQ

The magnetic flux density at the centre of a current carrying loop when radius of the loop is 2 m, loop current of 1 mA, and loopis placed in air, is ________ × 10–9 Wb/m2. (Answer upto 3 digits after decimal.)

Solution :0.314 (0.300 - 0.330)

0.314 (0.300 - 0.330)Correct Option

QUESTION ANALYTICS

Q. 16

Have any Doubt ? Solution VideoFAQ

A lossy dielectric has μr = 1 and εr = 1, σ = 2 × 10–8 S/m. An electric field ������� ��� V/m is applied to the

dielectric. At _________ Hz frequency the conduction and displacement current densities are equal.

Solution :360 (355 - 365)

360 (355 - 365)Correct Option

QUESTION ANALYTICS

Q. 17

How many times the “LOOP” will be executed in the following program of an 8085 microprocessor?

Have any Doubt ?FAQ

A 6

Solution :(b)

B 7Correct Option

C 8

D Infinite

QUESTION ANALYTICS

Q. 18

Have any Doubt ?FAQ

In an 8085 microprocessor system, the active low chip select signal is generated by using address lines A15, ⋅ ⋅ ⋅ , A10 anda 6 input NAND gate. For selecting the address range CC00H to CFFFH, the inputs to the NAND gate should be

A

B

Solution :(c)

C

Correct Option

D

QUESTION ANALYTICS

Q. 19

Have any Doubt ?FAQ

To mask RST 5.5, RST 6.5 and to send logic1 on Serial Output Data (SOD) pin of an 8085 microprocessor, the data required inthe accumulator (A) before execution of “SIM” instruction should be equal to

A ABH

B ACH

B C

Solution :(c)

C CBHCorrect Option

D BCH

QUESTION ANALYTICS

Q. 20

Have any Doubt ?FAQAn instruction that can be used to complement each bit of the accumulator is

A ANI F0H

B ANI 0FH

C XRI 0FH

Solution :(d)

D XRI FFHCorrect Option

QUESTION ANALYTICS

Q. 21

Have any Doubt ?FAQ

Consider the following statements regarding an 8085 microprocessor system with I/O mapped I/O: 1. I/O devices have 16-bit address.

2. I/O devices are accessed using IN and OUT instruction. 3. There can be a maximum of 256 input devices and 256 output devices.

4. Arithmetic and logic operations can be directly performed with the I/O data. Which of the above statements are correct?

A 1 and 4 only

B 1 and 3 only

Solution :(c)

In I/O mapped I/O, I/O has 8 bit address and 28 = 256.

C 2 and 3 onlyCorrect Option

D 2 and 4 only

QUESTION ANALYTICS

Q 22

Q. 22

Have any Doubt ?FAQ

The range of address that can be used to access the memory (RAM) in the below figure is

Solution :(a)

A 6000H to 7FFFHCorrect Option

B 6000H to 7FFEH

C E000H to EFFFH

D E000H to EFFEH

QUESTION ANALYTICS

Q 23

Q. 23

Have any Doubt ? Solution VideoFAQ

Three point charges are located at the corners of an equivalent triangle of50 cm side as shown in figure. The magnitude and direction of force on q3 is,

A

B

Solution :(c)

CCorrect Option

D

QUESTION ANALYTICS

Q. 24

Have any Doubt ? Solution VideoFAQ

Point charges of 120 nC each are located at A (0, 0, 1) and B (0, 0, –1) in free space. The electric field intensity at point P(0.5, 0,0) is given by

Solution :(a)

ACorrect Option

B

C

D

QUESTION ANALYTICS

Q. 25

Have any Doubt ? Solution VideoFAQ

Two point charges –4 μC and 5 μC are located at (2, –1, 3) and (0, 4, –2) respectively. The potential at (1, 0, 1) assuming zeropotential at infinity is;

A 4.85 kV

B –4.85 kV

C 5.87 kV

Solution :(d)

D –5.87 kVCorrect Option

QUESTION ANALYTICS

Q. 26

Have any Doubt ? Solution VideoFAQ

If scalar potential is given by:

then electric field at (2, 30°, 60°) is given by:

A

C O i

Solution :(a)

Correct Option

B

C

D

QUESTION ANALYTICS

Q. 27

Consider the following program of an 8085 microprocessor, operating at 2 MHz clock frequency:

Have any Doubt ?FAQ

Solution :35

35Correct Option

QUESTION ANALYTICS

Q. 28

Consider the following 8085 assembly language program:

Have any Doubt ?FAQ

Solution :146

146Correct Option

QUESTION ANALYTICS

Q. 29

Have any Doubt ? Solution VideoFAQ

Let electric field (V/m) in the neighborhood of point P (6, 2 –3). The incremental work done in

moving a 4 Coulombs charge at distance of 1 mm in the direction specified by; is given by, _________ Joules.

Solution :-1.39 (-1.45 - -1.33)

-1.39 (-1.45 - -1.33)Correct Option

QUESTION ANALYTICS

Q. 30

Have any Doubt ? Solution VideoFAQ

A potential function is V = (2x + 4y) volts is in free space. The stored energy in free space in the 1 m3 volume centered at originis ________ × 10–12 Joules.

Solution :88.4 (88.0 - 89.0)

88.4 (88.0 - 89.0)Correct Option

QUESTION ANALYTICS

Q. 31

Have any Doubt ? Solution VideoFAQ

For the capacitor shown in the figure, the value of   εR1 is ________ if εR2 = 2.5 and the total capacitance is 60 nF.

Solution :3.988 (3.900 - 4.050)

3.988 (3.900 - 4.050)Correct Option

QUESTION ANALYTICS

Q. 32

Have any Doubt ? Solution VideoFAQ

The magnitude of the displacement current through a parallel plate air filled capacitor having plate area of 10 cm2 andseparated by a distance of 2 mm is ________ × 10–3 A. While the supply voltage is 300 volts (sinusoidal) at 1 MHz frequency.

Solution :8.34 (8.20 - 8.50)

8.34 (8.20 - 8.50)Correct Option

QUESTION ANALYTICS

Q. 33

Have any Doubt ? Solution VideoFAQ

An iron ring or toroid, 0.2 m in diameter and 10 sq. cm. sectional area of the core is uniformly wound with 250 turns of wire. Ifthe flux density in the core is to be 1 Tesla and = 500, then the energy stored in the inductor is ________ Joules.

Solution :0.5 (0.40 - 0.60)

0.5 (0.40 - 0.60)Correct Option

QUESTION ANALYTICS