Exam Details
| Subject | Electricity and Electronics | |
| Paper | ||
| Exam / Course | BSC (Nautical Science) | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | December, 2015 | |
| City, State | new delhi, |
Question Paper
With the help of a neat diagram, explain the principle, construction and working of D.C. Generator.
A 50kVA, single phase transformer has 500 turns on the primary and 100 turns on the secondary. The primary is connected to 2100 50 Hz supply. Calculate:
The secondary voltage for open circuit
The current flowing through the two windings on full load
The peak value of flux
State and explain Kirchhoff's laws with example.
Using node voltage method, find the current in 3 ohm resistance for the network shown in Figure 1.
<img src='./qimages/13565-2b.jpg'>
What do you mean by an ideal ammeter? How do you convert a given galvanometer into an ammeter? Explain briefly.
A moving coil meter has a resistance of 2 n and gives full scale deflection with 10 rnA. Show how it can be used to measure voltage up to 250 V.
Discuss the concept of self and mutual inductance.
In a given R circuit R 2·5 ohm and L 0·2 H. Find the current through the circuit and power factor, if an alternating voltage v 230 L30° V having frequency 50 Hz is applied across the circuit.
What is the need of modulation Explain the modulation index, upper and lower side band frequencies in case of amplitude modulation.
Explain the circuit operation of full wave bridge rectifier with proper waveshapes.
What is a transistor? Explain input and output characteristics of an NPN transistor in a common base configuration.
The current gain of a transistor in a common base arrangement is 0·95. Find the voltage gain and power gain, ifthe load resistance of the output circuit is 500 k.ohm and input resistance is 100 ohm.
Write a short note on electromagnetic waves
The pulse repetition frequency of a pulsed radar is 750 Hz. Find the maximum range in kilometers that the radar can detect a target. Also determine the range in miles (nmi).
8. Write short notes on any two of the following:
LDR
Temperature Measurement
Transducers
A 50kVA, single phase transformer has 500 turns on the primary and 100 turns on the secondary. The primary is connected to 2100 50 Hz supply. Calculate:
The secondary voltage for open circuit
The current flowing through the two windings on full load
The peak value of flux
State and explain Kirchhoff's laws with example.
Using node voltage method, find the current in 3 ohm resistance for the network shown in Figure 1.
<img src='./qimages/13565-2b.jpg'>
What do you mean by an ideal ammeter? How do you convert a given galvanometer into an ammeter? Explain briefly.
A moving coil meter has a resistance of 2 n and gives full scale deflection with 10 rnA. Show how it can be used to measure voltage up to 250 V.
Discuss the concept of self and mutual inductance.
In a given R circuit R 2·5 ohm and L 0·2 H. Find the current through the circuit and power factor, if an alternating voltage v 230 L30° V having frequency 50 Hz is applied across the circuit.
What is the need of modulation Explain the modulation index, upper and lower side band frequencies in case of amplitude modulation.
Explain the circuit operation of full wave bridge rectifier with proper waveshapes.
What is a transistor? Explain input and output characteristics of an NPN transistor in a common base configuration.
The current gain of a transistor in a common base arrangement is 0·95. Find the voltage gain and power gain, ifthe load resistance of the output circuit is 500 k.ohm and input resistance is 100 ohm.
Write a short note on electromagnetic waves
The pulse repetition frequency of a pulsed radar is 750 Hz. Find the maximum range in kilometers that the radar can detect a target. Also determine the range in miles (nmi).
8. Write short notes on any two of the following:
LDR
Temperature Measurement
Transducers
Other Question Papers
Departments
- Centre for Corporate Education, Training & Consultancy (CCETC)
- Centre for Corporate Education, Training & Consultancy (CCETC)
- National Centre for Disability Studies (NCDS)
- School of Agriculture (SOA)
- School of Computer and Information Sciences (SOCIS)
- School of Continuing Education (SOCE)
- School of Education (SOE)
- School of Engineering & Technology (SOET)
- School of Extension and Development Studies (SOEDS)
- School of Foreign Languages (SOFL)
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- School of Health Science (SOHS)
- School of Humanities (SOH)
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- School of Journalism and New Media Studies (SOJNMS)
- School of Law (SOL)
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- School of Performing Arts and Visual Arts(SOPVA)
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- School of Translation Studies and Training (SOTST)
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Subjects
- Applied Mathematics
- Applied Science
- Cargo Handling, Stowage and Seamanship
- Cargo Handling, Stowage and Seamanship- II
- Electricity and Electronics
- N a v i g a t i o n I ( T e r r e s t r i a l a n d C e l e s t i a l )
- N a v i g a t i o n I I ( B r i d g e E q u i p m e n t , W a t c h K e e p i n g ,
- N a v i g a t i o n I V
- Navigation-III
- Navigational Aids & Environmental Protection
- Qualifying Paper (English and Human Factors)
- Qualifying Paper (Maritime, History and Commerce)
- Ship Manoeuvring and Future Issues
- Ship Operations
- Ship Safety and Security