Explore topic-wise InterviewSolutions in Current Affairs.

ong>ANSWER:

C.6

Explanation:

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ay of LIGHT is TRAVELLING in a direction perpendicular to the boundary of a parallel glass slab

Explanation:

ong>Answer:

The pendulum clock is made up of invar because invar's COEFFICIENT of thermal expansion is small. So, the length of the pendulum remains unaffected during changes in TEMPERATURE.

ong>Answer:

An error or fault can be described as the disparity between the CALCULATED worth and the exact worth. For instance, if the two machinists use a similar instrument for discovering the errors in measurement, it is not required that they may acquire the RELATED outcomes. But, there will be a slight variation between both the measurements which is known as an error. In sequence, to know the idea of errors in measurement, one has to recognize the two conditions that describe the error namely measured value as well as true value. The “true value” is unfeasible to find out the accuracy of measurement by experimental means that can be defined as the standard value of a countless number of calculated values. This value can be described as the expected value of true value which can be established by taking numerous calculated values throughout experimentation.

Explanation:

Types of Errors in Measurement

The errors in measurement may happen from the various SOURCES which are generally categorized into the following types. These are clarified beneath in details.

Systematic Errors

Gross Errors

Random Errors

Types of Errors in Measurements

Types of Errors in Measurements

1. Systematic Errors

These types of systematic errors are generally categorized into three types which are explained below in detail.

Observational Errors

Environmental Errors

Instrumental Errors

Systematic Errors

Systematic Errors

Observational Errors

The observational errors may occur due to the fault study of the instrument reading, and the sources of these errors are many. For instance, the indicator of a voltmeter retunes a little over the surface of the scale. As a result, a fault happens except the line of the image of the witness is accurately above the indicator. To reduce the parallax error extremely precise meters are OFFERED with reflected scales.

Environmental Errors

Environmental errors will happen due to the outside situation of the measuring INSTRUMENTS. These types of errors mostly happen due to the temperature result, force, moisture, dirt, vibration otherwise because of the electrostatic field or magnetic. The remedial measures used to remove these unwanted effects include the following.Types of Errors in Measurement

The errors in measurement may happen from the various sources which are generally categorized into the following types. These are clarified beneath in details.

Systematic Errors

Gross Errors

Random Errors

Types of Errors in Measurements

Types of Errors in Measurements

1. Systematic Errors

These types of systematic errors are generally categorized into three types

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DISTRIBUTIVE LAW

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en:

Two bodies A and B are made to vibrate in such a way that Body A VIBRATES 10 times in a second and Body B vibrates 120 times in 1 minute.

To find:

• Which body PRODUCES shriller SOUND?

• How is pitch related to frequency?

• Activity to show this effect.

Solution:

Frequency of body A = 10/60 = 0.16 Hz

Frequency of body B = 120/60 = 2 Hz

Since , Body B has higher frequency, it will produce a shriller (high pitched) sound than Body A.

• Frequency is directly proportional to the pitch.

• Higher the pitch , higher will be frequency , higher will be the shrillness of the sound.

Experiment:

• Go to physics lab of your school.

• Take two tuning forks of different frequencies (e.g. 256 Hz and 512 Hz)

• MAKE the forks vibrate by hitting it on a cork plate.

• Bring the vibrating fork near your ear.

• You will be ABLE to understand this effect of frequency and pitch.

• 512 Hz tuning fork will produce high pitched sound than 256 Hz fork.

HOPE IT HELPS.

AVERAGE speed=total distance/total time

Avery speed=36/4=9m/sec^2

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ong>Answer:

[A] QUANTITIES having units, but no DIMENSIONS : Plane angle,angular DISPLACEMENT, solid angle. These physical quantities POSSESS units but they does not possess dimensional formulas.

The answer is A

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ong>ANSWER:

the QUANTUM number of 7D is.....

ong>ANSWER:

It is a UNIT of pressure not temperature

1 atm = 101325 PA

ong>Answer:

Newton's third lawstates that for a force applied by an object A on object B, object B EXERTS back an equal force in magnitude, but opposite in direction. This idea was USED by Newton to derive the law of conservation of momentum. It is often stated as: For EVERY ACTION, there is an equal and opposite reaction.

Hope it will HELP you

ong>ANSWER:

same

Explanation:

when resistors are connected in PARALLELL the voltage REMAIN same throughtout the CIRCIUT

an object in a REST or CONTINUOUS in motion at CONSTANT

USING the formula 1/f = 1/v + 1/u

You will get that the IMAGE is FORMED 6.7 cm behind the mirror and it is virtual

ong>EXPLANATION:

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ong>Answer:

The halogens are five non-metallic elements found in group 17 of the periodic table. ... The halogens exist, at ROOM temperature, in all three states of MATTER: SOLID- IODINE, Astatine. Liquid- Bromine.

ong>Answer:

ELECTRICAL resonance is said to take place in a series LCR circuit when the circuit ALLOWS MAXIMUM current for a given frequency of the source of alternating supply for which capacitive reactance BECOMES equal to the inductive reactance.

ong>Explanation:

An Operating System (OS) is an INTERFACE between a COMPUTER USER and computer hardware. An operating system is a software which PERFORMS all the basic tasks like file management, memory management, process management, handling input and OUTPUT, and controlling peripheral devices such as disk drives and printers..

there are no OPTIONS GIVEN....

ong>Answer:

the correct answer id CALLED DISPLACEMENT

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An object GOING VERTICAL upward from the surface of the earth, having an initial velocity EQUAL to the ESCAPE velocity , escapes the gravitational force of the earth

Explanation:

i hope it helps you..

000mm - 4500m

=4.5km

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YES it is EQUAL

1st (b)

2nd (a)

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...................... . 32.5m

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ong>Answer:

Let , magnitude of the two FORCES be F

1

and F

2

.

Given,

for GR ether resultant θ=0

0

=

F

1

2

+F

2

2

+2F

1

F

2

cos0

=

(F

1

+F

2

)

2

=F

1

+F

2

=7N............(i)

Now,forleastresultantθ=180

0

=

F

1

2

+F

2

2

+2F

1

F

2

cos

180

=

(F

1

+F

2

)

2

A

=F

1

+F

2

=3N............(ii)

Adding equation (i) and (ii) we get,

2F

1

=10;F

1

=5N

Putting VALUE of F

1

in (i) we get,

F+2=2N

After adding 3N to each force we get,

F

1

′

=8N

F

2

′

=5N

When they are applied at θ=60

0

Resultant force F will be,

After solving we will get,

F=

129

ong>Explanation:

All objects RESIST changes in their state of MOTION. All objects have this tendency - they have inertia. ... Mass is that quantity that is solely DEPENDENT UPON the inertia of an object. The more inertia that an object has, the more mass that it has.Inertia is a property or a tendency of a body to resist the motion of the physical object or body. No, all bodies don't have same inertia, RATHER they have different inertial mass. ... Hence, not all the object have the same tendency to be in same state of rest or in motion.

ong>Answer:

(D)b,C,a is the answer

Explanation:

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ong>Answer:

The average SPEED of an object is DEFINED as the distance traveled DIVIDED by the time ELAPSED. Velocity is a vector quantity, and average velocity can be defined as the displacement divided by the time.

ong>Answer:P>

EXPLANATION:

P= i + J + k

q=2i - j - k

p-q= ( i + j + k) - (2i - j- K)

     =i + j + k -2i + j +k

     = -i +2j +2k

ong>ANSWER:

CONVEX MIRROR is used as rear mirror in cars BEACUSE those type of MIRRORS gives a wide range of view.

ong>Answer:

For the SAKE of accuracy, this section should be ENTITLED "One dimensional equations of motion for constant acceleration". Given that such a title WOULD be a stylistic nightmare, let me begin this section with the FOLLOWING qualification. These equations of motion are valid only when acceleration is constant and motion is constrained to a straight line.

Given that we live in a three dimensional UNIVERSE in which the only constant is change, you may be tempted to dismiss this section outright. It would be correct to say that no object has ever traveled in a straight line with a constant acceleration anywhere in the universe at any time — not today, not yesterday, not tomorrow, not five billion years ago, not thirty billion years in the future, never. This I can say with absolute metaphysical certainty.

Explanation:

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ong>Answer:

write your QUESTIONS correctly and than SHARE your questions

20 m^2

Explanation:

AREA= lxb

. 5x4

20 m

hope the answer is helpful

R1=40ohms

R2=40 ohms

According to the QUESTION,

Rs=R1+R2=80ohms(In series)

therefore, R1=80-R2

Rp=1/R1+1/R2=20ohms

=} R1×R2=20(R1+R2)

(80-R2)×R2=20(80-R2+R2)

80R2^2-R2=1600

R2^2-80R2-1600=0

(R2-40) (R2-40)-1600=0

Therefore,

R2=40ohm

by R2 we GET R1 as,

40 ohms

Hope it helps....

ong>Answer:

mark brainliest

Explanation:..............

Look at the Periodic Table of Elements and find the ELEMENT that you want to know the quantum number for. Find the PRINCIPAL number, which denotes the element's energy, by LOOKING in which period the element is found. For example, sodium is in the third period of the table, so its principal quantum number is 3.

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EXPLANATION:

By decreasing the value of R2 the DUTY CYCLE increases towards 100% and by increasing R2 the duty cycle reduces towards 50%. If resistor, R2 is very large relative to resistor R1 the output FREQUENCY of the 555 astable circuit will determined by R2 x C only.

en :

• A CAR TRAVELS on a flat circular track of 200M at 30m/s

• centripetal acceleration = 4.5m/s^2

• MASS of car = 1000kg

To find :

• the frictional force required

• If its coefficient of static friction is 0.8 what is the maximum speed at which the car can circle the track

Formula used:

• Force (F) = mass × Acceleration

• Maximum speed (v) = √(μrg)

where :-

• μ = coefficient of static friction
• r = radius
• g = 10 m/s²

Solution :

⟹mass = 1000kg

⟹Acceleration = 4.5m/s²

⟹Friction Force (F) = mass × Acceleration

⟹F = 1000 × 4.5

⟹F = 4500 N

Now we will find maximum speed at which the car can circle the track :-

⟹ v = √(μrg)

Now put :-

• μ = 0.8
• r = 200
• g = 10

⟹

⟹

⟹

⟹

⟹

⟹

Answer :

• frictional force = 4500N
• maximum speed = 40 m/s

____________________

Learn more :-

• v = wr

• ar = r w²

• F = mv²/r

• Maximum speed (v) = √(μrg)

___________________

ong>ANSWER:

To convert an AC generator into DC generator

split-ring type commutator MUST be used.

slip RINGS and brushes must be used.

a stronger magnetic FIELD has to be used.

a rectangular wire loop has to be used.

2 is a VALID PROCEDURE NAME

ong>ANSWER:

I don't no so L can't answer you

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