1) In DC motor interfacing, which modulation controls the duty cycle of square wave provided at the output by generating variation in the average DC voltage?
a. Amplitude Modulation
b. Frequency Modulation
c. Pulse Width Modulation
d. Phase Modulation
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Answer
Explanation
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ANSWER: Pulse Width Modulation
Explanation:
No explanation is available for this question!
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2) In DC motor interfacing, which field/s is/are generated by forcing current through the coil for spinning of the motor?
a. Electric field
b. Electrostatic field
c. Magnetic field
d. All of the above
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Answer
Explanation
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ANSWER: Magnetic field
Explanation:
No explanation is available for this question!
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3) In LCD, which hex command performs the function of 'Display on, cursor on and blinking'?
a. 0x0A
b. 0x0C
c. 0x0E
d. 0x0F
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Answer
Explanation
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ANSWER: 0x0F
Explanation:
No explanation is available for this question!
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4) In LCD, which function is executed by '0x05' hex command?
a. Shift display left
b. Shift display right
c. Clear display
d. Return cursor to home
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Answer
Explanation
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ANSWER: Shift display right
Explanation:
No explanation is available for this question!
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5) For the supplied data, which edge level is necessary for LCD in order to latch the data?
a. High-to-Low
b. Low-to-High
c. High-to-High
d. Low-to-Low
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Answer
Explanation
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ANSWER: High-to-Low
Explanation:
No explanation is available for this question!
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6) In LCD, which pin/s is/are used to latch the data into the data register or command register?
a. RS pin
b. R/ W
c. E
d. All of the above
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Answer
Explanation
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ANSWER: E
Explanation:
No explanation is available for this question!
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7) What is the size range of the alphanumeric LCDs?
a. 1 to 8 characters
b. 8 to 80 characters
c. 100 to 150 characters
d. 250 to 400 characters
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Answer
Explanation
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ANSWER: 8 to 80 characters
Explanation:
No explanation is available for this question!
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8) In LPC 2148, which among the following is/are the functions of Mask register?
a. Byte addressability
b. Relocation to ARM local bus for fastest posible I/O timing
c. Treating sets of port bits in the form of group without changing other bits
d. All of the above
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Answer
Explanation
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ANSWER: Treating sets of port bits in the form of group without changing other bits
Explanation:
No explanation is available for this question!
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9) In DAC 0808, what is the high speed multiplying input slew rate?
a. 2 mA/μ sec
b. 4 mA/μ sec
c. 8 mA/μ sec
d. 16 mA/μ sec
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Answer
Explanation
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ANSWER: 8 mA/μ sec
Explanation:
No explanation is available for this question!
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10) In DAC 0808, which among the following is configured as a reference in addition to R-2R ladder and current switches?
a. Voltage amplifier
b. Current amplifier
c. Transconductance amplifier
d. Transresistance amplifier
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Answer
Explanation
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ANSWER: Current amplifier
Explanation:
No explanation is available for this question!
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