BSc Sem VI 2014 2015 2015 Physics Question Paper - Mumbai University | munotes
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Questions asked in this paper
- Figures to the right indicate full marks
: (1) All questions are compulsory, A
Figures to the right indicate full marks
) Symbols have their usual Meanings unless otherwise Stated,
Use of log table and /or calculators ig allowed
(i) Discuss the construction and working of an n -channe] enhancemen;
type MOSFET. Draw and explain its drain characteristics and
4 Discuss the construction and working of a triac with necessary
— characteristic curves, Also discuss its application as a electronic change
over of transformer taps,
Discuss the use of JFET as Series switch, 5
(ii) What is photodiode? Explain the use of Photodiode in optocoupler. 5
Jraw the circuit of tran: istorised mono; multivibrator andexplain 19
worki pulse width of output signal
Wi xplai he working of a voltage regulator 10
nt types of unwanted errors that get introduced in
the ne to signal conversion using transistorized
Draw the diagram of an Instrumentation amplifier using three 10
PAmps. its working. Derive an expression for its CMRR. (
the working of a free multivibrator using IC 555. Derive 10
an for period of output wave. Sketch the capacitor voltage
the working of Log amplifier using OPAmp, 5
Explain the working of first order active low pass filter using OPAmp in 5
both inverting and non-inverting configuration,
) Attempt any one
(i) What are Tristate devices? With the help circuit diagram explain 49
the operation of TTL tristate inverter
Draw the circuit diagram of 4-bit asynchronous Up/Down counter. With 49
the help of timing diagrams, explain its working
Define modulation. State its necessity in communication system. 5
(ii) Construct a 4-bit Serial in Serial out Shift register using D flip flops. 5
Explain its operation
(a) Attempt any one
An n-channel JFET has 10 mA and 4
the gate source voltage and drain current at the half cut off point
(ii) An SCR in a circuit is subjected to a 35 A surge current for 10ms. 4
Determine whether this surge will destroy the device. The circuit fusing
(b) Attempt any one
free running determine the values 4
of capacitors to be used to provide a train of pulses, Wide, ata
repetition raté of 19 KHz , if 2
A differential amplifier with doubie ended input and double-ended output 4
has r,= 125 for each Determine the values of R_ and R,
to get A,, = 500 and CMRR = 80 dB
(c) Attempt any one
A 555 timer is for monostable operation. If R= 10KQ 4
and C=0.047 find the pulse width of the output pulse
For =12 find the maximum voltage across the capacitor,
find the value of the capacitor used to pulse ata rate
of 3 KHz. Estimate the peak-to-peak voltage across Capacitor for
(d) Attempt any one
maximum peak to peak voltage of an AM wave is and 3
minimum peak to peak voltage is 4 mV. Calculate the modulation
(ii) is by audio signal with frequency span of
What are the frequencies of the lower and upper side 3
Figures to the right indicate full marks
) Symbols have their usual Meanings unless otherwise Stated,
Use of log table and /or calculators ig allowed
(i) Discuss the construction and working of an n -channe] enhancemen;
type MOSFET. Draw and explain its drain characteristics and
4 Discuss the construction and working of a triac with necessary
— characteristic curves, Also discuss its application as a electronic change
over of transformer taps,
Discuss the use of JFET as Series switch, 5
(ii) What is photodiode? Explain the use of Photodiode in optocoupler. 5
Jraw the circuit of tran: istorised mono; multivibrator andexplain 19
worki pulse width of output signal
Wi xplai he working of a voltage regulator 10
nt types of unwanted errors that get introduced in
the ne to signal conversion using transistorized
Draw the diagram of an Instrumentation amplifier using three 10
PAmps. its working. Derive an expression for its CMRR. (
the working of a free multivibrator using IC 555. Derive 10
an for period of output wave. Sketch the capacitor voltage
the working of Log amplifier using OPAmp, 5
Explain the working of first order active low pass filter using OPAmp in 5
both inverting and non-inverting configuration,
) Attempt any one
(i) What are Tristate devices? With the help circuit diagram explain 49
the operation of TTL tristate inverter
Draw the circuit diagram of 4-bit asynchronous Up/Down counter. With 49
the help of timing diagrams, explain its working
Define modulation. State its necessity in communication system. 5
(ii) Construct a 4-bit Serial in Serial out Shift register using D flip flops. 5
Explain its operation
(a) Attempt any one
An n-channel JFET has 10 mA and 4
the gate source voltage and drain current at the half cut off point
(ii) An SCR in a circuit is subjected to a 35 A surge current for 10ms. 4
Determine whether this surge will destroy the device. The circuit fusing
(b) Attempt any one
free running determine the values 4
of capacitors to be used to provide a train of pulses, Wide, ata
repetition raté of 19 KHz , if 2
A differential amplifier with doubie ended input and double-ended output 4
has r,= 125 for each Determine the values of R_ and R,
to get A,, = 500 and CMRR = 80 dB
(c) Attempt any one
A 555 timer is for monostable operation. If R= 10KQ 4
and C=0.047 find the pulse width of the output pulse
For =12 find the maximum voltage across the capacitor,
find the value of the capacitor used to pulse ata rate
of 3 KHz. Estimate the peak-to-peak voltage across Capacitor for
(d) Attempt any one
maximum peak to peak voltage of an AM wave is and 3
minimum peak to peak voltage is 4 mV. Calculate the modulation
(ii) is by audio signal with frequency span of
What are the frequencies of the lower and upper side 3
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