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

Rule- The object in the active voice becomes the subject in the passive voice and the subject in the active voice becomes the object in the passive voice.This is valid in both ways (Active to passive and vice-versa). Further, the verb is changed to the past participle form. 
Thus, option 1 is correct.

Pandemonium refers to a situation of complete confusion.
Example- The parliament has recently turned into a place of pandemonium. 

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।

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

Five persons A,B,C,D and E are sitting one above the other on a ladder (not necessarily in the same order).

1) B is sitting above A with one person between them.

2) Only two persons are sitting between A and C. If C is not sitting top, the figure are given below -

In which there is two case in which first one is -

Second case are given below -

After observation of both cases, B is the sitting in the middle.

Hence, "B" is the correct answer.

As per the given information;

Distance between S and P = √(PQ² + QS²)
SP = √(6² + 8²)
SP = √(36 + 64)
SP = √100
SP = 10 km
Hence, S is 10 km in South-East with respect to P.

The pattern followed is:

Top right number = multiplication of top left number and bottom number 

In fig 1:

729 = 81 × 9

729 = 729

In fig 2:

512 = 64 × 8

512 = 512

Similarly,

In fig 3:

? = 49 × 7

? = 343 

Hence, the correct answer is "343".

The correct answer is Germany.

Key Points

•  Hitler was the dictator of Germany.
• Adolf Hitler
  • Birth- April 20, 1889.
  • Death- April 30, 1945.
  • He was known as Der Führer (“The Leader”) in Germany.

​Additional Information

• He became the dictator in 1933 and he committed suicide in 1945 when Germany surrendered to the Allies.
  • Allies – The Allied Powers were initially led by the UK and France.
  • In 1941 they were joined by the erstwhile USSR and the USA.
  • They fought against the Axis Powers, namely Germany, Italy and Japan.
• He was the leader of the Nazi party.
• He had enormous hate for Jews for whom he established concentration camps.
  • Nazis devised an unprecedented means of killing people, that is, by gassing them in various killing centers.
• The number of people killed included 6 million Jews, 200,000 Gypsies, 1 million Polish civilians, 70,000 Germans who were considered mentally and physically disabled, besides innumerable political opponents.
• He wrote an autobiographical book titled "Mein Kampf" (My struggle) in 1925.

Important Points

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".

The correct answer is the Helium nucleus.

• Helium nucleus was the source of alpha particles in the Rutherford scattering experiment.
• Ernest Rutherford, a British scientist conducted an experiment and proposed the atomic structure of elements.

Key Points

• Rutherford conducted an experiment by bombarding a thin sheet of gold with α-particles.
• He then analysed the trajectory of these particles after their interaction with the gold foil.
• Since very few α-particles were deflected back, and only a few α-particles had nearly 180^o angle of deflection.
• Hence he concluded that the volume occupied by the positively charged particles in an atom is very small as compared to the total volume of an atom.

The correct answer is Kannauj.

Key Points

• The Palas, Prathiharas and Rashtrakutas fought for control of Kannauj.
• It is known as a tripartite struggle.
• Kannauj is a city situated in Uttar Pradesh.
• The Tripartite Struggle for Kanauj had happened between:
  • The Palas of Bengal.
  • The Pratiharas of Central India.
  • The Rashtrakutas of Deccan. 
• The tripartite struggle ultimately ended in favour of Nagabhata II, Gurjara - Pratihara ruler.
• ​​The struggle lasted for 200 years and weakened all of them which enabled the Turks to overthrow them. 

The correct answer is Divided.

• Federalism is a system of government in which the powers are divided between a central authority and various constituent units of the country.
• A federation has two levels of government.
  • A government for the entire country that is usually responsible for a few subjects of common national interest.
  • Governments at the level of provinces or states look after much of the day-to-day administering of their state.
• Both these levels of governments enjoy their power independent of the other.
• The central government can pass on orders to the provincial or the local government.
• In a federal system, the central government cannot order the state government to do something.
• The state government has powers of its own, independent of the central government.
• Both these governments are separately answerable to the people.
• Key features of federalism are:
  • There are two or more levels of government.
  • Each level has its own Jurisdiction in specific matters of legislation, taxation, and administration.
  • Courts have the power to interpret the constitution and the powers of different levels of government.
  • Sources of revenue for each level of government are clearly specified to ensure its financial autonomy.
  • Accommodate regional diversity.

Springs deform permanently because of elastic fatigueness. The elasticity of the material of spring is lost and it deforms permanently. 

Due to electric field, it experiences force and decelerates i.e. its velocity decreases.

Unit of angular frequency is rad/sec which can be said as angle/time. As angle is dimensionless and time has dimension T, we get the dimension of angular frequency as T^-1. So it has 0 dimensions in length.

R=1W
X_L=1000W
X_C=1000W
Z= Z= √ (R²+(X_L-X_C)²)
  =√(1²+(1000-1000)²)
Z=1W
    I=V/Z=100/1
I=1000A
 

Gross errors are primarily due to negligence, oversight, or lack of proper care during experimental procedures. Careless handling can lead to significant mistakes, such as incorrect measurements or misinterpretation of data, which are characteristic of gross errors. These types of errors are distinct from systematic or random errors, as they often result from human factors rather than inherent flaws in the experimental setup or measurement process.

Tensile stress (or tension) is the stress state leading to expansion; that is, the length of a material tends to increase in the tensile direction. The volume of the material stays constant. When equal and opposite forces are applied on a body, then the stress due to this force is called tensile stress.

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

Explanation:More the elastic a material is , more it has the property to regain its original position which is required in construction works.

The magnitude of displacement is the shortest straight-line distance between the initial and final positions of the particle.

• If the particle moves in a straight line without changing direction, the displacement is equal to the path length.
• If the particle follows a curved or non-linear path, the displacement is less than the path length.

Thus, the magnitude of displacement is always either less than or equal to the path length of the particle between two points.

When friction is absent

a₁ = gsinθ

When friction is present

a₂ = gsin θ - μ_k gcos θ

From Eqs. (i) and (ii)

Explanation:Although vectors and scalars represent different types of physical quantities, it is sometimes necessary for them to interact. While adding a scalar to a vector is impossible because of their different dimensions in space, it is possible to multiply a vector by a scalar.

Let the ball is pressed down by a small y, then the value of air decreased by Ay.  

Then, excess pressure is 

Newton's law of cooling states that the heat released by a body with respect to time (or) the rate of heat released is directly proportional to the difference between the body's temperature and the surrounding temperature. 
dH/dt = k(T – Ts) where t = surrounding's temperature and T = temperature of the body 
Consider two bodies A and B, of equal surface areas, such that A's temperature is more that B's temperature and the surrounding temperature is less than both A and B. Then according to Newton's law of cooling A loses more heat to the surroundings when compared B during the same time interval. So, A will cool faster than B.

The two physical quantities which do not have the same dimensions can’t be added or subtracted in the same expression because doing so would lead to equating two quantities of different dimensions, which is non possible. Ex [F]  [P].

Case of positively charged particle : Two forces are acting on the positively charged particle (a) due to electric field in the positive x-direction. (b) Force due to magnetic field.

This forces will move the positively charged particle towards Y-axis.

Case of negatively charged particle.
Two forces are acting on the negatively charged particle (a) due to electric field in the negative X-direction. (b) due to magnetic field

Same direction as that of positive charge. (c) is the correct answer.

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