#### Electrical engineering

• ( 1 ) A frequency counter ______________.

• 1) Counts pulse width
• 2) Counts no. of clock pulses in 1 second
• 3) Counts high and low range of given clock pulse
• 4) None of these
• Discussion in forum
Answer : 2) Counts no. of clock pulses in 1 second
Solution : A frequency counter Counts no. of clock pulses in 1 second

discussion

Answer : 2) Counts no. of clock pulses in 1 second

• ( 2 ) The storage cell in DRAM is:

• 1) a flip -flop
• 2) a capacitor
• 3) a fuse
• 4) a magnetic domain
• Discussion in forum
Answer : 2) a capacitor
Solution : The storage element of the DRAM memory cell is the capacitor. The charge stored in the capacitor degrades over time, so its value must be refreshed (read and rewritten) periodically. The nMOS transistor (3) acts as a gate to allow reading or writing when open or storing when closed.

discussion

Answer : 2) a capacitor

• ( 3 ) Demultiplexer is also called:

• 1) Data selector
• 2) Data router
• 3) Data distributor
• 4) Data encoder
• Discussion in forum
Answer : 3) Data distributor
Solution : The data distributor, known more commonly as a Demultiplexer or "Demux" for short, is the exact opposite of the Multiplexer we saw in the previous tutorial. The demultiplexer takes one single input data line and then switches it to any one of a number of individual output lines one at a time.

discussion

Answer : 3) Data distributor

• ( 4 ) ________ is used to simplify the circuit that determines the next state.

• 1) State diagram
• 2) Next state table
• 3) State reduction
• 4) State assignment
• Discussion in forum
Answer : 4) State assignment
Solution : State assignment is used to simplify the circuit that determines the next state.

discussion

Answer : 4) State assignment

• ( 5 ) LUT is acronym for _________ .

• 1) Look Up Table
• 2) Local User Terminal
• 3) Least Upper Time Period
• 4) None of given options
• Discussion in forum
Answer : 1) Look Up Table
Solution : LUT is acronym for Look Up Table.

discussion

Answer : 1) Look Up Table

• ( 6 ) Odd parity of word can be conveniently tested by

• 1) OR gate
• 2) AND gate
• 3) NOR gate
• 4) XOR gate
• Discussion in forum
Answer : 4) XOR gate
Solution : Odd parity of word can be conveniently tested by XOR gate

discussion

Answer : 4) XOR gate

• ( 7 ) The first step in analyzing emitter-based circuits is to find the

• 1) base current.
• 2) emitter current.
• 3) supply current.
• 4) collector current.
• Discussion in forum
Answer : 2) emitter current.
Solution : The first step in analyzing emitter-based circuits is to find the emitter current.

discussion

Answer : 2) emitter current.

• ( 8 ) The collector current is 1.5 mA. If the current gain is 50, the base current is

• 1) 3 μA.
• 2) 30 μA.
• 3) 150 μA.
• 4) 3 mA.
• Discussion in forum
Answer : 2) 30 μA.
Solution : The collector current is 1.5 mA. If the current gain is 50, the base current is 30 μA.

discussion

Answer : 2) 30 μA.

• ( 9 ) When the diode is forward biased, it is equivalent to

• 1) an off switch.
• 2) an on switch.
• 3) a high resistance.
• 4) None of these
• Discussion in forum
Answer : 2) an on switch.
Solution : When the diode is forward biased, it is equivalent to an on switch.

discussion

Answer : 2) an on switch.

• ( 10 ) Which of the following gates is known as coincidence detector ?

• 1) AND gate
• 2) OR gate
• 3) NOT gate
• 4) XOR gate
• Discussion in forum
Answer : 1) AND gate
Solution : AND gate is known as coincidence detector.

discussion

Answer : 1) AND gate