EMRS PGT Physics Mock Test - 5 - EMRS MCQ

CONCEPT:

Galvanometer:

• A galvanometer is used for detecting current in an electric circuit.
• The galvanometer is the device used for detecting the presence of small currents and voltage or for measuring their magnitude.
• The galvanometer is mainly used in the bridges and potentiometer where they indicate the null deflection or zero current.
• The potentiometer is based on the premise that the current sustaining coil is kept between the magnetic field experiences a torque.

EXPLANATION:

• From the above, it is clear that the galvanometer is the instrument used for detecting the presence of electric current in a circuit. Therefore option 1^st is correct.

​Additional Information 

Mistake Point
Difference between Ammeter and Galvanometer:

• The ammeter shows only the magnitude of the current.
• The galvanometer shows both the direction and magnitude of the current.

In the question,

11² = 121

13² = 169

17² = 289

19² = 361

23² = 529

24² = 576

Thus we can say except for (24)² , all the given number is a square of a prime number.

Hence, Option (2) is correct.

The pattern followed here is:

Hence, the correct answer is "L".

in the figure the 8 triangle is shown easily and another is COD , DOB, BOA, AOC, ACD, BDC,ABC, ABD so that total no. of triangle is 8 + 8 = 16

The total squares is in the give figure is 1² + 2² + 3² + 4² = 30

Search engine is a software system that is designed to search for information based on the entered keywords on the World Wide Web.

Mr. Rathore uses a lot of audio-visual aids while teaching. The main reason for doing so is to take care of the requirements of all the children. Audio-visual aids make the learning permanent. They stimulate both aural and visual senses of children. Some children understand better on observation i.e. visual, whereas other students understand better on aural stimulation. Thus, requirements of all the students are taken care of.

Given peak potential is 200v
so, amplitude is 200
and frequency is 50Hz
so angular frequency is 2.πx50 = 314/sec
so the value is
E = 200sin(314t)
Hence option B is the correct answer.

Kepler's Law states a principle relevant to planetary motion. The area swept out by a line connecting a planet to the Sun is constant over time. This principle ensures that the aerial velocity of a satellite, which is the rate of area swept out, remains constant.

This concept is mathematically represented as:

• dA / dt = Constant

Where dA is the area swept out in time dt.

Velocity of efflux, v = √((2gh)/√(1-(a/A)²)
Since ‘h’ is the height from top so 3 – 0.525 = 2.425 m

 

From the definition, the work done to a test charge ‘q0’ from one place to another place in an electric field is given by the formula
W=q₀x[v_final-v_initial ]
100=4x[v-(-5)]
v+5=25
v=20V
 

When rubber ball completely filled with water its centre of gravity will be at its centre, as water will fall through hole its COG will shift towards lower side leading to increase in length of pendulum and thus T, when very small amount of water will be left in rubber ball its COG will again shifts upward causing decrease in length and thus T, and finally when rubber ball becomes empty its COG will be at its centre and T will remains same as earlier.

Kinematic equations of rotational motion about a fixed axis,

where ω is the instantaneous angular velocity, α is the instantaneous angular acceleration, θ is the angular displacement, and t is time.

EXPLANATION:

Given: Length of the rod = L, and angular displacement θ = 2t²

• Using the first equation,

• Using the second equation, 

Therefore option 4 is correct.

For sustainable interference wavelengths have to be the same. So frequency has to be the same too. Contact phase relation is also necessary to sustain the interference pattern else the pattern will keep changing so rapidly that we will not see any pattern.
Equal intensity is not a requirement to keep pattern sustained.

As the relative velocity of the satellite with respect to the earth is zero, it appears stationary from the Earth surface and therefore it is called is geostationary satellite or geosynchronous satellite.

As seen from the image, in the direction of magnetic field

mgsinθ=il×B
mgsinθ=ilB

Horizontal component is a component of Earth’s magnetic field along the horizontal direction in the magnetic meridian. It is denoted by B_H. If B is the intensity of Earth’s total magnetic field, then the horizontal component of Earth’s magnetic field is given by:
B_H=Bcosδ

Theoretical  

The nature of light which is verified by the interference event is wave nature. Even though light has dual nature interference experiments only tell us about the wave nature.

NOTE : Magnetic lines of force form closed loops.
Inside a magnet, these are directed from south to north pole.

A dimensionless quantity can have unit. for example angle (radian). But oppisite is not true. A unitless quantity can never have dimensions.it is the unit that give dimensions.

Velocity is defined as the rate of change of position with respect to time. Given that x = a t³, we find the velocity by differentiating x with respect to t:

v = dx/dt = d(a t³)/dt

Since a is a constant, the derivative is:

v = a × d(t³)/dt = a × 3 t²

So, the velocity as a function of time is v = 3a t².

The Education of children with special needs should be provided along with children with non-special needs. To promote the education of special needs children along with non-special needs children concept of inclusive education was proposed. In Inclusive Education, all students are welcomed, they have been given equal opportunity irrespective of caste, creed, religion, special-needs, non-special needs.
Hence, the correct answer is, 'Along with other normal children.'

Determinants of Individual differences in human beings relate to both heredity and environment interacting together. By heredity we mean the influence of factors inherent in the child himself from the time he is conceived. Environment also plays a key role in the individual's development.

The New Education Policy lays particular emphasis on the development of the creative potential of each individual. It is based on the principle that education must develop not only cognitive capacities - both the ‘foundational capacities ’of literacy and numeracy and ‘higher-order’ cognitive capacities, such as critical thinking and problem solving – but also social, ethical, and emotional capacities and dispositions. 

Key Points Following are the proposals made by National Education Policy 2020 (NEP):-

•  a variety of methods and strategies such as group work and role plays be used for assessment. 
•  apart from assessment by the teacher, other ways such as self-assessment and peer-assessment should be encouraged.
•  report card of the student should include progress in the cognitive, affective, and psychomotor domains. 
• focus on regular formative assessment for learning rather than the summative assessment that encourages today’s ‘coaching culture.

​Thus, it is concluded that NEP 2020 proposes shift from formative to summative assessment regarding proposals made by National Education Policy 2020 (NEP) is not correct.

'All in the same boat' figuratively means that a group of people is facing the similar situations or difficulties. Option 4 represents this meaning correctly.
Example- At times of danger all humans seem to be in the same boat irrespective of divides.

The correct form of the word would be 'likes'. This is because the subject of the sentence is singular. 

• रद का अर्थ : दांत।
• रद्द का अर्थ : ख़राब।

अन्य महत्वपूर्ण शब्द युग्म

Additional Information

सही उत्तर 'अपमान' है।
Key Points

• 'अपमान ' शब्द के अनेकार्थी शब्द - अनादर, उपेक्षा, निरादर।
• 'अपमान' के अन्य अनेकार्थी शब्द - बेइज्जती, अवज्ञा, तिरस्कार, अवमाना।

​ अन्य विकल्प -

1. अभय- निडर, साहसी, निर्भीक, निर्भय, निश्चिन्त।

2. अभियोग- दोषारोपण, कसूर, अपराध, गलती, आक्षेप, आरोप, दोषारोपण, इल्ज़ामा।

3. अनुपम- सुन्दर, अतुल, अपूर्व, अद्वितीय, अनोखा, अप्रतिम, अद्भुत, अनूठा, विलक्षण, विचित्र।

Additional Information