Bihar PGT Physics Mock Test - 9 - Bihar PGT/TGT/PRT MCQ

The sentence seems to say that the person in concern was expecting a surprise on his birthday and not accepting it. Expect means to want or wish for something whereas accepting means to receive or recognize some issue.
Thus option 2 is correct.

Rule- If the reporting verb is in the past tense, the verb in the reported speech is changed to the corresponding past form.  
Thus, the sentence is changed to the corresponding past form. 

A realist is a person who analyses every problem on real and factual terms.
Example- The world today requires realist leaders more than anything else.

वाक्य में क्रिया का प्रभाव या फल जिस शब्द पर पड़ता है, उसे कर्म कारक कहते हैं।

जब विशेषण का प्रयोग संज्ञा के रूप में कर्म कारक की भाँति होता है, तब उसके साथ 'को' का प्रयोग होता है, जैसे- बुरों को कोई नहीं चाहता, भूखों को भोजन कराओ इत्यादि।

वन्दना की वर्तनी शुद्ध है।

वंदना का अर्थ है - स्तुति, पूजन

जिन शब्दों के अन्त में आई, वट, हट आदि प्रत्यय हों वे प्राय: स्त्रीलिंग होते हैं; जैसे- सिलाई, बुनाई, कटाई, लिखावट, बनावट, घबराहट, चिल्लाहट इत्यादि।

सामान्य - मामूली, साधारण

श्रेष्ठ - अति उत्तम, उत्कृष्ट

सर्वज्ञ - सबकुछ जाननेवाला

साधारण - सब जगह पाया जानेवाला, आम, साधारण दृश्य, साधारण पहनावा, सामान्य, मामूली

विशिष्ट - विशेषता युक्त, असाधारण

शब्द- नमस्ते

सन्धि विच्छेद- नमः + ते

सूत्र- विसर्जनीयस्य सः सूत्र से खर प्रत्याहार के वर्ण परे रहते विसर्ग को स् हो जाता है।

उदाहरण- नमः + ते = नमस्ते

नमस्ते का सन्धिविच्छेद नमः + ते होता है। जिससे स्पष्ट होता है कि नमः के पश्चात् आये विसर्ग में परिवर्तन हुआ है। जो विसर्ग सन्धि के लक्षण से युक्त है। अतः यहाँ विसर्गसन्धि होगी।

The correct answer is Rangoon.

Important Points

• Bahadur Shah Zafar was the last Mughal emperor in the Indian subcontinent.
• After the death of Bahadur Shah Zafar, none of his descendants were recognized as kings.
• Bahadur Shah Zafar was the son of  Akbar II.
• The entry of Bahadur Shah Zafar to the 1857 rebellion gives courage, hope, and confidence to ordinary people.
• British forces recaptured Delhi from the rebel forces in September 1857.

Key Points 

• The last Mughal emperor, Bahadur Shah Zafar was tried in court and sentenced to life imprisonment.
• The British exiled him to Rangoon following his involvement in the Indian Rebellion of 1857.
• Bahadur Shah Zafar and his wife Begum Zeenat Mahal were sent to prison in Rangoon in 1858.
• Bahadur Shah Zafar died in the Rangoon jail in 1862.
• After the death of Bahadur Shah Zafar, his family was shifted out of the Red Fort and given another place in Delhi to reside in.

The correct answer is Orbit.

• An orbit is the path of a planet around the sun.

Key Points

• Kepler's Law of Planetary Motion states that planets revolve in an elliptical orbit.
• Kepler’s Laws of Planetary Motion:
  • All planets move around the sun in elliptical orbits, with the sun being at rest at one focus of the orbit.
  • The position vector of the planet with the sun at the origin sweeps out equal area in equal time.
  • The square of the period of revolution of a planet around the sun is directly proportional to the cube of the main distance of the planet from the sun.

Additional Information

• Our galaxy is called the Milky Way (or the Akashganga) and it contains about 300 billion stars and one of these is our sun.
  • Planets and other objects go round the sun and make up the solar system with the sun at the center. 
  • Milky Way Galaxy was formed 5 billion years after the Big Bang.

The correct answer is Accra.

• Accra is the capital and the most populous city of Ghana, with an estimated urban population of 2.27 million as of 2012.
• Ghana is a country located in West Africa.
• Ghanaian cedi is the currency of Ghana.
• Ghana or the Republic of Ghana is located along the Gulf of Guinea and the Atlantic Ocean.

Given:

Man rows 24 km in upstream and 40 km in downstream and takes 8 hours in each

Formula used:

Speed = Distance/Time

y = ½ (u - v); where, u is speed of rowing downstream, v is speed of rowing upstream and y is speed of stream

Calculation:

Downstream speed = u = 40/8 = 5 kmph

Upstream speed = v = 24/8 = 3 kmph

The logic followed here is:

1) Intact and Unflawed are synonyms meaning not damaged and perfect.

2) Entire and Partial are antonyms.

3) Bright and Luminous are synonyms.

4) Pure and Perfect are synonyms.

Both the words are synonyms in all the options except option 2, where the given words are antonyms.

Hence, the correct answer is "Entire : Partial".

Venn diagram according to the given information is:

Guava, Mangoes, Fruits

As Mangoes and guava both are fruits, so they will come inside the fruits.

But,

Individually both the guava and mangoes are different fruits so there will be no intersection or shared part, so they will come as a separate circle inside the fruits.

Hence, the correct answer is "Option 4".

Key-Points

Water Pollution:

• Water pollution occurs when harmful substances often chemicals or microorganisms contaminate a stream, river, lake, ocean, aquifer, or other body of water, degrading water quality and rendering it toxic to humans or the environment.
• Water pollution is a major environmental issue in India.
• The largest source of water pollution in India is untreated sewage.
• Other sources of pollution include agricultural runoff and unregulated small-scale industry.
• Most rivers, lakes, and surface water in India are polluted due to industries, untreated sewage, and solid wastes.

Hence, option 1 is the correct answer. 

Important Points
​Untreated Sewage:

• A 2007 study found that the discharge of untreated sewage is the single most important source of pollution of surface and groundwater in India.
• There is a large gap between the generation and treatment of domestic wastewater in India.
• The problem is not only that India lacks sufficient treatment capacity but also that the sewage treatment plants that exist do not operate and are not maintained.

Additional Information

1. Agriculture run-off: Farms discharge large quantities of agrochemicals, organic matter, drug residues, sediments, and saline drainage into water bodies. Nevertheless, agricultural pollution, aggravated by increased sediment runoff and groundwater salinization, is also becoming an issue.
2. Unregulated small-scale industries and religious practices comparatively have less contribution to water pollution in major rivers of India.

There is a long straight wire W, the current flowing direction in the wire is into the plane of paper and the point of intersection on the axis of magnet is P.
If the midpoint of the bar magnet is P then the distance from the point P to the wire will be the shortest distance.
So, the bar magnet will experience a force along the line of shortest distance.
 

Frequency of fork one is 346 Hz.
When the other fork is waxed, the beat is increased.
So, the frequency of other fork is less than the frequency of fork one.
So, 
beat = frequency of fork one − frequency of second fork
4=346− Frequency of second fork
Frequency of second fork =350 Hz

The Particle Model of emission and absorption is based on the idea that light is composed of discrete particles called photons, and these photons carry quantized energy. This model helps us understand how atoms and molecules interact with light by either emitting or absorbing photons during electronic transitions.

A ductile material is one that can withstand a large amount of plastic deformation between the elastic limit and the fracture point.
A material that breaks suddenly when elongated or fracture occurs in it soon after the elastic limit is crossed is called a brittle material.
A ductile material that exhibits extra elongation or deformation and does not fracture is also referred as superplastic material.

As the temperature increases, the inter-atomic distance also increases. So, it results in an increase in the area (stress = force /area). As the area increases stress decreases, this results in a decrease in Young's modulus.

Gross errors are mostly due to lack of knowledge, judgment and care on the part of experiment. That is Gross error is caused by careless handling.

c) The following points should be considered while making the circuit :

(i) An ammeter is made by connecting a low resistance R₂ in parallel with the galvanometer G₂.

(ii) A voltmeter is made by connecting a high resistance R₁ in series with the galvanometer G₁.

(iii) Voltmeter is connected in parallel with the test resistor R_T.

iv) Ammeter is connected in series with the test resistor RT.
(v) A variable voltage source V is connected in series with the test resistor R_T.

Φ= hνλ => 2eV= 6.626 x 10^-34 x ν

2 x 1.6 x 10^-19= 6.626 x 10^-34 x ν

On solving we get ν = 4.6 x 10¹⁴ Hz.

Conventionally, field lines originate from a positive point charge and terminate at negative charge

Given:

Let two balls A and B have mass m_A, m_B respectively, and their initial velocities are u_A and u_B. After the collision, they will move with the same velocity, v_o. 

Given that mass of both balls are same.

So  m_A = m_B = m

u_A = V,  u_B = 0

From the Concept of Momentum Conservation:

m_Au_A + m_Bu_B = (m+m)v_o

mV = 2mv_o

v_o = V/2

Both the balls after impact will move with velocity v/2.

Fringe width = λD/d
where λ us wavelength
D is the distance between slits & screen
d is the distance between slits
ATQ: x = Lλ/d => λ = xd/L

 =1.5x0.22
 =15x22x10-3
 =330x10-3
Τ=0.33J
 

Statemen t-1 is tr ue. Sensitivity =. If  B increases, θ/I
increases. Statement-2 is wrong because soft  iron can be easily magnetised and de magnetized.

Given A storage battery is connected to a charger for
charging with a voltage of 12.5 Volts. The internal
resistance of the storage battery is 1 ohm. When the
charging current is 0.5 A, the emf of the storage
battery is:
When the battery is charging
We know that
V = e + i r  
V = 12.5, i = 0.5, r = 1  
12.5 = e + 0.5 x 1
12.5 = e + 0.5
e = 12.5 – 0.5
e = 12 v