UGC NET Paper 1 — Physics

Which of the following is correct increasing order of frequency of electromagnetic waves?

Increasing the ratio of fissile Uranium (U-235) in natural uranium is known as:

Which of the following components of Electromagnetic Radiation reach earth as a part of solar radiation? A. Gama- Rays B. X- Rays C. Ultraviolet Radiation D. Visible Rays E. Infrar...

Which of the following are true about moderator used in nuclear reactors? A. Moderators slow down neutrons to sustain the chain reaction B. Moderators stops the neutrons to control...

Which of the following statements are correct regarding the moderator used in nuclear reactors?

What is the correct increasing order of U-235 (fissile uranium) ratio in following?

What is the correct sequence, from smaller to larger, of following photovoltaic related systems? A. Module B. Array C. Solar cell D. Array Field Choose the correct answer from the...

नामिकीय (न्यूक्लियर) रिएक्टरों में मंदक वे पदार्थ होते है A. जो न्यूट्रान की गति धीमी कर देते हैं B. जो श्रृंखला प्रतिक्रिया को सीमित कर देते हैं C. जो श्रृंखला प्रतिक्रिया को बनाए...

Which of the following are true about sound ? (A) 10 decibel (dB) increase in sound is equal to 10 fold increase in sound intensity (B) 20 dB increase in sound is equal to 20 fold...

In nuclear reactors, 'moderators' are substances. A. That slows down neutron B. That limits the chain reaction C. That helps to sustain the chain reaction D. Without which chain re...

In a breeder reactor

A train running at a speed of 90 km/hr starts slowing down at a constant rate of decrease in speed of 2.5 m/s. What is the distance covered by the train before it comes to a halt?

Given below are two statements: Statement I: Photovoltaic cells produce Alternating current (a.c.). Statement II: Photovoltaic cells are exposed directly to the sun, therefore as t...

The total power output in a hydroelectric installation depends upon A. the total water flow B. the electrical conductivity of water C. atmospheric temperature D. vertical distance...

Which of the following elements is fissile?

Light Water Reactors (LWR) are nuclear reactors

Light water nuclear reactors use the following moderator:

Given below are two statements: Statement I: In a breeder reactor more fissile material is produced than it is consumed. Statement II: In a breeder reactor, breeding works best wit...

Through enrichment process, concentration of which uranium isotope is increased in the natural uranium?

Waste uranium from the nuclear reactors is called as

What is the waste uranium from nuclear reactors called?

संलयन की प्रक्रिया में प्रति 100 यूनिट की ऊर्जा खपत से कैलिफोर्निया स्थित नेशनल इग्निशन प्रयोगशाला निम्नलिखित में से कितनी यूनिट ऊर्जा उत्पन्न कर पाई थी?

Given below are two statements: One is lebelled as Assertion A and the other is labelled as Reason R. Assertion A: In concentrating type solar collector temperature can be raised u...

The substance that slows down the neutrons to have controlled chain reaction during nuclear energy production is called as

A 20 dB increase in noise level represents an enhancement in intensity of sound by a factor of

Reducing the intensity of noise by a factor of 10 will mean a reduction in noise level by

Given below are two statements: Statement I: Amorphous silicon is highly light absorbing material. Statement II: Amorphous silicon is not suitable material for solar cell developme...

Poly crystalline silicon often used in Photovoltaic cells as semiconductors are:

What will be the resultant of two noise levels of 81 dB and 90 dB generated by two independent sources?

Given below are two statements : Statement I: Solar flat plat collectors essentially work on the principle of Green House Effect. Statement II: Black absorber plat radiates infrare...

Noise levels (db) are referenced to the human hearing threshold at a frequency of

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R Assertion A: The decibel level for a given loudness may be different at differe...

In Photo Voltaic system (PV-system) arrange the following from smallest to the largest unit. (i) Module (ii) Array (iii) Solar cell (iv) Array field Choose the correct answer from...

Given below are two statements: Statement I: Two sounds of same intensity but different frequency characteristics appear to be of different loudness Statement II: The response of h...

Wind energy is very sensitive to the wind velocity because wind power is directly proportional to the:

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R Assertion A: A windmill with proper design considerations can be made to operat...

Which of the following statements are true about a fuel cell? (a) It is a device that uses electrochemical reactions to produce electric current (b) It consists of a positive elect...

Which are the examples of potential kinetic energy? Select your answer from the options given below: (i) Water that is behind a dam (ii) Radio signals (iii) An airplane idling on t...

Two earthquakes A and B happen to be of magnitude 5 and 6 respectively on Richter Scale. The ratio of the energies released EB/EA will be approximately :

दो भूकंप A और B रिक्टर स्केल पर क्रमशः 5 और 6 परिमाण के आए। उत्सर्जित ऊर्जाओं का अनुपात लगभग (EB/EA) कितना होगा ?