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GATE 2019: EC Revision Test-5
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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 ___.
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.
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
If this to be used with 8085 to generate read and write control signals then valid outputs are
If this to be used with 8085 to generate read and write control signals then valid outputs are
Question 8
Maximum number of 2564 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
(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
(Assume that the guide is filled with a lossless dielectric
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Sep 12ESE & GATE EC