Time Left - 40:00 mins

GATE 2019: EC Revision Test-5

Attempt now to get your rank among 415 students!

Question 1

Cycle stealing mode of DMA operation involves?

Question 2

The instructions used for rotating the contents for an accumulator with carry are___

Question 3

If the clock frequency of a microprocessor is 5 MHz. Then the time required to execute PUSH B instruction is ________ μsec.

Question 4

Point charges Q1=1nC and Q2=2nC are at a distance apart. Which of the following statements are incorrect?

Question 5

In cylindrical co-ordinates,

This equation is called ___.

Question 6

Consider the program given below:
MOV A, C
STC
CMC
DCR C
Let the content of register C is 00 H initially and the above instructions are executed, then Content of register C and flag register is respectively.

Question 7

Consider the 3×8 decoder given below
Description: image010.png
If this to be used with 8085 to generate read and write control signals then valid outputs are

Question 8

Maximum number of 256Description: image023.png4 memory chips that can be interfaced with INTEL 8085 microprocessor are_________.

Question 9

For the instructions given below, how many memory operations (read/write) are performed during the execution in an 8085 μP?
(i) Call 2000 H
(ii) LDA 2000 H

Question 10

Content of accumulator is 8E H. if SIM instruction is executed, the which of the following statement is true.

Question 11

A rectangular waveguide having mode as dominant mode is having a cutoff frequency of . If the dimensions of the waveguide are related by , where is the inner broad wall dimension, then find the cutoff frequency of mode. (in GHz)

Question 12

A plane wave in free space ( is incidentally normally on a large block of material ( which occupies z >0. If the incident electric field is E=10 Then reflected magnetic field is

Question 13

An air filled rectangular waveguide with inside dimensions 2 x 1 cm is excited with a source of 7 GHz. If the waveguide is operating in dominant mode, then phase constant inside the waveguide is given by_______ (rad/m)

Question 14

Spherical surfaces at r = 2 and 4 m carry uniform surface charge densities of 20 nC/ and 4 nC/respectively. The radial electric flux density at r=3 m is given by _____nC/.

Question 15

A rectangular waveguide operates at 4.5 GHz in the dominant mode. IF the group velocity is determined as 1.5 x 108 m/s, the largest dimension of the waveguide is ________cm.
(Assume that the guide is filled with a lossless dielectric
  • 415 attempts
  • 1 upvote
  • 1 comment
Sep 12ESE & GATE EC