Explore topic-wise InterviewSolutions in Current Affairs.

Answer:

Studying Physical Science is important because it helps humans to EXPLAIN and understand a natural PHENOMENON by OBSERVING their physical properties and replication in the environment. ... Physical science USES practice experimentation and the scientific method to study and measure NUMEROUS physical effects.

Answer:

The assertion is correct and reason is wrong.

Explanation:

Assertion: When a coil is MOVED out a magnetic field acting normally to its plane, induced EMF is produced.

Since there is CHANGE in the magnetic field when the coil is moving out, there is a change in magnetic flux induced which in turn has induced an EMF in the coil.

dΦ=B⋅dA (change in flux directly proportional to change in area in contact with magnetic field)

EMF = dΦ / DT (induced emf is directly proportional to the change in flux density)

Whereas the assertion,

Given Reason: The induced EMF is produced in a coil when it is placed inside the magnetic field​.

This is statement is false, as the EMF can't be induced in a stationary coil.

Correct reason: The induced emf is produced in a coil due to the change in magnetic flux density when the coil is moved out of the magnetic field.

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ANSWER:

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Answer:

The external FORCE ACTING on a BODY on account of which its size or SHAPE or both change is defined as the deforming force. Restoring force : The force which restores the size and shape of the body when deformation forces are\ removed is CALLED restoring force.

Answer:

• The instantaneous velocity after 3 SECS is 30 m/s

Explanation:

It's GIVEN that the motion of a particle is given by the equation x = 9 + 5t², here we need to find the instantaneous velocity of the particle at t = 3 seconds. so, from the RELATION between instantaneous velocity and DISPLACEMENT we know that,

Here,

• v denotes instantaneous velocity.
• dx denotes small displacement.
• dt represents short interval of time.

Substituting the values,

• Substituting t = 3 seconds

∴ The instantaneous velocity after 3 secs is 30 m/s.

Answer:

WEIGHT:

The FORCE with which EARTH attract towards its CENTRE due to gravity is CALLED weight.

Unit:

Newton (N)

Solutions to UNDERSTANDING Computer Applications Class 10 Unit 9-Nested ... WRITE whether the following STATEMENTS are True/False ... outer: for (int i = 1; i <= 5; i ++) { for (int j = 1; j <= 10; j++) { System.out.println(j); if ( i ...

Explanation:

Resistors are SAID to be connected in “Series”, when they are daisy chained together in a single line.

Since all the CURRENT flowing through the first resistor has no other WAY to go it must also pass through the second resistor and the THIRD and so on.

• The amount of current in a series circuit is the same through any component in the circuit. This is because there is only ONE path for current flow in a series circuit.

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Explanation:

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ANSWER:

OPPOSITE to the DIRECTION of the MOTION.

ANSWER:

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Explanation:

ANSWER:

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Explanation:

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ANSWER:

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Answer:

The EXTERNAL FORCE acting on a body on account of which its size or SHAPE or both change is defined as the deforming force. RESTORING force : The force which restores the size and shape of the body when DEFORMATION forces are\ removed is called restoring force.

Explanation:

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ANSWER:

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Answer:

15

Explanation:

in dot PRODUCT you can multiply only in the same direction so I CAP can be multiplied by I cap only and so on so

2×1 +2×-1+3×5= 15

Explanation:

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ANSWER:

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ANSWER:

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ANSWER:

NEGATIVE......1/2k(X INITIAL square -x final square

Explanation:

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Answer:

your question NUMBER 4 answer is STANDARD INFORMATION UNIT of magnetic induction for genetic FORCE

Answer:

Molten sodium chloride conducts electricity because of the movement of the IONS in the melt, and the discharge of the ions at the ELECTRODES. Both of these have to HAPPEN if you are to GET electrons flowing in the external circuit.

Answer:

As

=> SPEED = DISTANCE/time

So

● The two MEASUREMENTS which are necessary for CALCULATING speed are distance and time.

ANSWER:

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Explanation:

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ANSWER:

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EXPLANATION:

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ANSWER:

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Explanation:

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Answer:

Hookes law:

WITHIN the elastic limit, the stress APPLIED is directly proportional to strain produced.

Explanation:

stress=thrust/area=F/πr^2

strain=change in length/original length=∆l/l

Young's MODULUS (Y)=stress/strain

=F*l/πr^2*∆l

ANSWER:

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बहगदजडुि्परकततिूाैरैनोव्नॉव

Two resistances when connected in parallel, RESULTANT VALUE is 2 OHMS. Let the two resistances be R1 and R2. So if R2 = 6ohms, then R1 = 9 - 6 = 3 ohms...

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ANSWER:

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Explanation:

It is the collective responsibility of the government and the people of India to keep the beautiful diversity of our NATION bound in the cord of unity INTACT. LET's preserve the diversity of our unique country by upholding unity among its DIFFERENT cultures, languages, FAITHS, customs, and traditions.

ANSWER:

cceleration DUE to gravity CHANGES with the height from Earth's SURFACE as:

g  

′

=g(1−  

R

2h

​  

)

⇒g  

′

=9.8(1−  

6400

2×100

​  

)

⇒g  

′

=9.8(1−  

32

1

​  

)=9.49m/s  

2

Explanation:

Explanation:

In computing, a printer is a peripheral MACHINE which makes a persistent REPRESENTATION of GRAPHICS or text, usually on paper. While most output is human-readable, bar code PRINTERS are an example of an expanded use for printers.

THE SURFACE WHICH IS THE LOCUS OF ALL POINTS WHICH ARE AT THE SAME POTENTIAL IS KNOWN AS THE EQUIPOTENTIAL SURFACE. NO WORK IS REQUIRED TO MOVE A CHARGE FROM ONE POINT TO ANOTHER ON THE EQUIPOTENTIAL SURFACE.

ANSWER:

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ANSWER:

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Answer:

The MAGNESIUM donates electrons to the iron, which slows down the RUSTING PROCESS. This is effective even for the parts of the iron which are not in direct CONTACT with the magnesium. The magnesium CORRODES instead of the iron, 'sacrificing' itself.

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Answer:

0.98m/s

Explanation:

Given that:

MASS of disc,M=10g=0.010kg

Mass of each marble,m=5g=0.005kg

Suppose the NUMBER of marbles STRIKING the disc per second=n and velocity with which marbles strike disc is v.

Then Weight of disc ACTING downward=Mg

Change in velocity of marbles when they rebound =v−(−v)=2v

Therefore the change in momentum of each marble when it strikes the disc=m∗2v=2mv

and total momentum imparted per second to the disc=2mnv= The force exerted by the marbles in the upward direction

The disc will REMAIN at rest if the net force acting on it is zero provided it is initially at rest.

Therefore for the disc to remain at rest,

Weight of disc=Upward force on it

=Mg=2mnv

v=

2mn

Mg

=

(2∗0.005∗10)

(0.010∗9.8)

=0.98m/s

Electrical method

A bar of STEEL or IRON can be magnetised by placing it in a COIL of wire (SOLENOID). Passing a d.c. (direct current) through the wire will magnetise the bar.

EXPLANATION:

h or distance traveled by OBJECT = 38M

v=32m/s

g (gravity)or a(acceleration )=9.8 m/s

we know that v^2-u^2=2as

32- u^2=2×9.8×38

u^2=744.8-32

u^2=712.8

u =26.7m/s

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Answer:

0.98m/s

Explanation:

Given that:

MASS of disc,M=10g=0.010kg

Mass of each marble,m=5g=0.005kg

Suppose the number of marbles striking the disc PER second=n and velocity with which marbles strike disc is v.

Then WEIGHT of disc acting downward=Mg

Change in velocity of marbles when they rebound =v−(−v)=2v

Therefore the change in momentum of each marble when it strikes the disc=m∗2v=2mv

and total momentum imparted per second to the disc=2mnv= The FORCE exerted by the marbles in the upward direction

The disc will remain at rest if the NET force acting on it is zero provided it is initially at rest.

Therefore for the disc to remain at rest,

Weight of disc=Upward force on it

=Mg=2mnv

v=

2mn

Mg

=

(2∗0.005∗10)

(0.010∗9.8)

=0.98m/s

Answer:

ΔT = T2 – T1

Explanation:

he ADJACENT less ENERGETIC ONES as result of interactions between the particles. ... A. The temperature difference across the wall is ΔT = T2 – T1. ... thermal conductivity is defined as the rate of heat transfer through a unit ... Insulators are materials used primarily to provide resistance to heat flow.

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ANSWER:

The VALUE of G at a DEPTH is GIVEN by:

g  

d

​  

=g(1−  

R

d

​  

)

Here, g  

d

​  

=  

4

g

​  

⇒  

4

g

​  

=g(1−  

R

d

​  

)

⇒  

R

d

​  

=  

4

3

​  

⇒d=0.75×6400=4800 km

Explanation:

Answer:

Placzek's major areas of scientific WORK involved a fundamental THEORY of Raman SCATTERING, molecular spectroscopy in gases and liquids, neutron PHYSICS and mathematical physics. Together with Otto FRISCH, he suggested a direct experimental proof of nuclear fission.

➡

Positive charge is carried by the protons in MATERIAL and negative CHARGE by electrons. The overall charge of an object is usually due to CHANGES in the number of electrons.

____________

Answer:

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Answer:

c) 2940 cm/s

Explanation:

GIVEN:

Initial velocity (u) = 0 m/s (As it was DROPPED from rest)

Time (t) = 3 seconds

Acceleration (a) = g = 9.8 m/s²

To find:

Final velocity (V)

Method to find:

v = u + at

⇒ v = 0 + (3 * 9.8)

⇒ v = 29.4 m/s = 2940 cm/s

Hence, the speed of the rock after 3 seconds of free FALL was 2940 cm/s.