Explore topic-wise InterviewSolutions in Current Affairs.

Answer:

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EXPLANATION:

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Distance is a scalar QUANTITY that REFERS to "how much ground an object has covered" during its motion. Displacement is a VECTOR quantity that refers to "how far out of place an object is"; it is the object's OVERALL change in POSITION.

ANSWER:

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 SPHERICAL mirrors whose inner side is reflecting are called CONCAVE mirrors. Spherical mirrors whose outer side is reflecting are called convex mirrors. It's focus and centre of curvature LIES behind the mirror

Answer:

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Explanation:

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Answer:

LENGTH is the physical QUANTITY which is related to the unit LIGHT year. Light year is an unit which describes the distance travelled by light rays in the time period of a whole year.

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ANSWER:

CHANGE the speed, SHAPE and the direction of MOTION of an object

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Answer:

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Explanation:

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Answer:

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Explanation:

For most substances, MELTING and freezing points are approximately equal. For example, the melting point and freezing point of mercury is 234.32 Kelvin (−38.83 °C or −37.89 °F). ... For example, agar MELTS at 85 °C (185 °F) and solidifies from 31 °C (88 °F; 304 K); such direction dependence is known as hysteresis.

Hope it HELPS...

Answer:

a= b'2

Explanation:

the best way to GO to the RIGHT to be a bit of a

ANSWER:

Scattering of light contributes significantly to the REDDISH APPEARANCE of the sun at sunrise and sunset

ANSWER:

Explanation:

Inorder to find the accelation we will require TIME taken to increase velocity from 12m/sto 30m/s

As it is not given in the question we will not be ABLE to find the acceleration

So KINDLY check if there is a MISTAKE in the question

GIVEN:-

TO FIND:-

• The Distance travelled by the car in 8TH SECOND after CROSSING the lamp post.

FORMULAE USED:-

Where,

S = Distance

u = Initial Velocity

n = Time

a = Acceleration.

Now,

.

Hence, The Distance travelled by car is 40m.

ANSWER:

Elements in the same column, or group, of the periodic table have the same number of valence electrons in their outer energy level. This gives them many SIMILAR PROPERTIES. It describes properties of the different groups of elements.

so the elements are divided into groups.

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ANSWER:

the no. of SIGNIFICANT FIGURES in GIVEN no. is 4

The displacement-time (s-t) graph of two particles A and B are STRAIGHT lines inclined at ANGLES of 30° and 45° with the time axis.

We have to find ratio of their velocities.

➢ We KNOW that, Slope of displacement-time (s-t) graph GIVES velocity.

Let's CALCULATE :D

Answer:

40 KM WEST HOPE it HELPS

ANSWER:

the SIZE of real image of mirror is 18 take HALF 1/3 so this is your answer

ANSWER:

a MUSLIM ASCETIC and MYSTIC.

ANSWER:

ELECTRONIC CURRENT SITUATION

ANSWER:

The HEIGHT of LIQUID COLUMN increase.

Explanation:

Answer:

not REALLY have so TIME to state the LAW,sorry

Explanation:

resultant vector,R2=p2+q2+2pqcosalpha

EXPLANATION:

Newton's second law says that when a constant force acts on a massive BODY, it CAUSES it to accelerate, i.e., to change its VELOCITY, at a constant RATE. ... In most cases, forces can only be applied for a limited time, producing what is called impulse.

A car is moving in such a WAY that velocity v changes with TIME t accordingly to the equation , v = 5t³ + 2t + 5 . Then find the acceleration of the car at t = 5 sec.

• Relation between v and t is given by the equation v = 5t³ + 2t + 5

• Acceleration of the car at t = 5

From CALCULAS Relation between v and a is given by ,

Where ,

• a is acceleration
• v is velocity
• t is time

We have ,

• v = 5t³ + 2t + 5

At time t = 5 ,

∴ The Acceleration of the car at t = 5 sec is 377 m/s²

★ Instantaneous power of a BODY is given by ,

Where ,

• W is work done

★ If we are given the position of a particle at any instant is 'x' , then velocity at any instant is given by ,

अत:, घूर्णी आर्मेचर वाले जनित्रों में ... भी अमरीका तथा दूसरे गतिशील देशों के समान हो

Answer:magnetic FIELD on the axis of circular loop is given by,

where N is number of turns , i is current through circular coil or loop , x is distance between point of observation to CENTER of circular coil, R is the radius of circular coil.

here, N = 50, i = 1A , R = 0.05m and x = 0.2m

and we know,  mkg/s²A²

so, B = (4π × 10^-7 × 50 × 1 × 0.05²)/(0.2² + 0.05²)^3/2

= 0.0000179 Weber/m²

= 1.79 × 10^-5 Weber/m²

hence, magnetic field is 1.79 × 10^-5 Weber/m²

Explanation:

Power in RLC Series Circuit

The product of voltage and current is defined as power. When XL > XC, the PHASE angle ϕ is POSITIVE. The circuit behaves as RL series circuit in which the current lags BEHIND the APPLIED voltage and the power factor is LAGGING.

the MOVING of pendulum has OSCILLATION in it and it is CALLED OSCILLATORY motiom

ANSWER:

Let M = (some NUMBER) (V)

a

(F)

B

(T)

c

EQUATING dimensions of both the sides

M

1

L

0

T

0

=(1)[L

1

T

−1

]

a

[M

1

L

1

T

−2

]

b

[T

1

]

c

M

1

L

0

T

0

=M

b

L

a+b

T

−a−2b+c

get a = - 1, b = 1, c = 1

M = (Some Number) (V

−1

F

1

T

1

)⇒[M]=[V

−1

F

1

T

1

]

Similarly, we can also express energy in terms of V, F, T

Let [E] = [some Number] [V]

a

[F]

b

[T]

c

⇒[ML

2

T

−2

]=[M

0

L

0

T

0

][LT

−1

]

a

[MLT

−2

]

b

[T]

c

[M

1

L

2

T

−2

]=[M

b

L

a+b

T

−a−2b+c

]

⇒ 1 = b; 2 = a + b ; -2 = -a - 2b + c

get a = 1 ; b = 1 ; c = 1

∴ E = (some Number) V

1

F

1

T

1

or[E]=[V

1

][F

1

][T

Answer:

Acceleration Example

Ans: Given, The VELOCITY is uniform, therefore the INITIAL and final VELOCITIES are equal and is given as V. Q2. A TRUCK is moving with a constant velocity, v = 5 m.s-1.

Explanation:

Answer:

the answer is continuous MOTION

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Answer:

A LONG solenoid has a RADIUS a and NUMBER of turns per unit length is n. If it carries a current i, then the magnetic FIELD on its axis is directly proportional to

For textbook answer, see the attachment.

Hope this helps you

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Answer:-

✧ The law which govern's the motion of planets are called Kepler's laws of planetary motion.

The THREE laws of Kepler's Law Of Panetary motion are :-

❶ Laws Of Orbit : According to this law every planet moves around the SUN in an elliptical path with sun at one of the foci.

❷ Laws Of Area : According to this law, the line joining the sun to the planet sweeps out equal areas in equal interval of time. it means aerial velocity of the planet around the sun is constant.

❸ Laws Of Period : This law STATES that the SQUARE of period of revolution of any planet around the sun is directly proportional to the cube of the semi-major AXIS of the orbit.

Answer:

F

=q(

V

×

B

)=QVB(

i

^

×(−

k

^

))=qvB

J

^

⇒ force on the charge is along OY

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Explanation:

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Answer:

The resistance of a connecting wire is numerically EQUAL to the ratio of potential difference across its ends to the current flowing through it. The resistance of the connecting wire DEPENDS on LENGTH, thickness, NATURE of material and temperature, of the conductor.

Explanation:

Or, B = [M1 L1 T-2] × [I1 T1]-1 × [L T-1]-1 = [M1 L0 T-2 I-1]. Therefore, Magnetic Field is DIMENSIONALLY represented as [M1 T-2 I-1].

ANSWER:

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Explanation:

DEPENDS on the NUMBER of FLOORS of the BUILDING

ANSWER:

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Explanation:

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Answer:

Three forces are ACTING on the rider and his BOARD. WEIGHT and gravity pull the board and rider down. The ground pushes them up. These forces cancel each other out, so nothing SPEEDS up the skateboard or stops it from rolling.

Explanation:

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Answer:

Given,

q₁ = 10⁻⁸ C

q₂ = -10⁻⁸ C

∵ one charge is positive and other charge is negative

∴ electric field due to q1 and electric field due to q2 are in same direction.

∴ Electric field at A = electric field due to q₁ + electric field due to q₂

= Kq₁/(0.05)² + kq₂/(0.05)²

= 9 × 10⁹ × 10⁻⁸/(0.05)² + 9 × 10⁹× 10⁻⁸/(0.05)²

= 2 × 9 × 10/(1/20)²

= 180 × 400 N/C

= 72000 N/C

Electric field at B = electric field due to q₁ - electric field due to q₂

= kq₁/(0.05)² - kq₂/(3 × 0.05)²

= 9 × 10⁹ × 10⁻⁸/(1/20)² - 9 × 10⁹ × 10⁻⁸/9 × (1/20)²

= 36000 - 4000

= 32000 N/C

Electric field INTENSITY at C =

Here ,Θ = 120° [ SEE attachment for understanding ]

E₁ = kq₁/(0.1)² = 9 × 10⁹ × 10⁻⁸/(0.1)² = 9 × 10³ = 9000 N/C

E₂ = 9000 N/C [ because magnitude of charges and SEPARATION are same ]

Now, Electric field intensity at C =

= 9000 N/C....

Answer:

We NEED strong core muscles for good balance. MANY stability exercises will work your ABS and other core muscles. Arms: No. Most balance exercises are about balancing on your FEET....

Answer:

FRICTION is responsible in WASTAGE of energy because due to friction DIFFERENT PARTS of am machine like a water pumping motor wear and tear because excessive heat is produced, this reduces efficiency of a machine.

ANSWER:

SLEEP for at LEAST 1 HOUR

ANSWER:

THE ANSWER IS: WEIGHT

Explanation:

BECAUSE ALL OTHER(ACCELERATION, velocity, DISTANCE, MOMENTUM) ARE RELATED TO MOTION.

HOPE IT HELPS YOU.

Answer:

Mass means - The Absolute Complete WEIGHT of BODY..

Weight means - The weight of body due to GRAVITY...

Explanation:

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ANWER:

Dimensional formula of polarisation density ρ =

EXPLANATION:

Electric polarisation can be defined as the relative change of positive and negative charges under the INFLUENCE of an external electric field. It can also be defined as the electric dipole moment PER unit volume. The unit of polarisation density is (Coulomb per square meter).

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ANSWER:

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