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option B is the correct answer

Electrical power is the rate at which electrical energy is converted to another form, such as motion, heat, or an electromagnetic field.

The common symbol for power is the uppercase letter P.

When expressed in watts, power is sometimes called wattage

R = 2202/100 Ω =484 Ω. This is the resistance of the bulb.

P = V2/R If V = 220 V we have100 W = 2202/RR = 2202/100Ω = 484Ω. This is the resistance of the bulb.When V = 110 V, power consumed =V2/R = 1102/484 = 25 W.

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mass,m=60kgenergygained=1000calweknowthat,1cal=4.2J1000cal=4200JSo,energygained=4200JEfficiency=28%Energyoutput=mgh=28%of4200J28/100×4200=60×9.8×hh=28×42/60×9.8h=2 m

Uniform accerlation means if the accerlation is uniform over a given period of time then it is called as uniform accerlation.That is the rate at which the velocity of body chnages with reapect to time should remain constant such accerlation is called as uniform accerlation.If the change is 10 m/s for first 10s then even in nxt 10s it should change by 10m/s only.

Since acceleration is rate of change of velocity over time,a body moving with uniform velocity will have 0 acceleration.a=dv/dtFor uniform velocity dv=0Hence a=0An object moving at uniform or constant velocity has zero acceleration because there is no change in velocity.

Gauss's law(orGauss'sfluxtheorem) is alawof physics. ... In words,Gauss's lawstates that: The net electric flux through any closed surface is equal to1⁄εtimes the net electric charge enclosed within that closed surface. Thelawwas created by Carl FriedrichGaussin 1835.

In orderto tellthe sign of an objectcharge,youneed another object with aknown positive or negative charge. Ifyourub a piece of glass with silk, it will have apositive charge(by convention). Ifyourub a piece of amber with fur, it will have anegative charge(also by convention).

Potential is the work done per unit charge. This implies that Joule per Coulomb is the SI unit of electric potential. It is a scalar quantity.Please hit the like button if this helped you.

Areference standard usedformeasurement of a physical quantity is calleda unit. It is arbitrarily chosen but internationally accepted.

Hence, option (d) is correct.

Aphysicalquantityis aquantitywhich can be measured

physical quantity

Physical quantity means that quantity that can be measured in terms of number

Option (D) is correct.

Explanation:A reference standard used for measurement of a physical quantity is called a unit. It is arbitrarily chosen but internationally accepted. For example, metre is a unit of length, second is a unit of time, kilogram is unit of mass, Newton is unit of force, Pascal is unit of pressure, joule is unit of energy,

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1.Solid angle, 2. Relative density– density relative towater3. Reynolds number

A physical quantity is a quantity in physics that can be measured. Or a physical quantity is a physical property that can be quantified. Examples of physical quantities are mass, amount of substance, length, time, temperature, electric current, light intensity, force, velocity, density.

Frequency remains constant, as frequency determines energy. This means that wavelength is shortened along with speed.

By conservation of linear momentum 2mv' =mvv'=v/2

Hence velocity of body of mass m after collision is ,v1=(m−2m)/(m+2m)u1 =−u1/3

Therefore ,K.E before collision/K.E after collision=(1/2m1u1^2)/(1/2m1v1^2) = 9:1

When the mass of the stationary ball is nearly equal to that of incident one,,or more than the mass of stationary ball

change in linear momentum is zero because in ideal gas molecules energy of the molecules remains same after collision hence its initial velocity equals to final velocity..hence the change in momentum is zero..

Change in the linear momentum is zero because in ideal gas collisions , the energy of a molecule remains same.. so its initial velocity is equal to final velocity and mass is also same.

Momentum = mass x velocity

when neither mass nor velocity changes,, so Kinetic energy and momentum remains unchanged

A molecule of mass m of an ideal gas collides with the wall of a vessel with a velocity v and returns back with the same velocity. the change in linear momentum of a molecule is.

Answers =

Change in the linear momentum is zero because in ideal gas collisions , the energy of a molecule remains same.. so its initial velocity is equal to final velocity and mass is also same.

Momentum = mass x velocity

when neither mass nor velocity changes,, so Kinetic energy and momentum remains unchanged

Here, L2 and L3 are in parallel so the equivalent inductance will be Leq = L2*L3/L2+L3 = 0.5/2 = 0.25H

and it is in series with L1

so total inductance will be L1+ Leq = 0.75+0.25 = 1H

option d.

Abase unit(also referred to as afundamental unit) is a unit adopted for measurement of a base quantity. A base quantity is one of a conventionally chosen subset of physical quantities, where no quantity in the subset can be expressed in terms of the others.

Fundamental quantitiesand theirUnitsare;

Length- Meter(SI), Cm(CGS)

Mass - Kilogram

Time- Seconds

Electric current -Ampere(SI), Bi(CGS)

Temperature- Kelvin,

Amount of substance -Mole

and

Luminous intensity.- Candela.

George Simon Ohm stated the Ohm’s law. He stated that the electric current flowing through a wire will be directly proportional to the potential difference across the ends when the temperature remains constant. That constant is the resistance. V = I RLimitations1. Ohm’s law is applicable and valid for many materials. But there are some materials that do not support the ohm’s law. Some materials and devices which are used in electric circuits do not have the proportionality between voltage and current.2. Although Ohm’s law is an important principle in the field of electronics, it cannot be considered as an actual physical law. We know that as per ohm’s law voltage / current = a constant and that constant is the resistance. But the resistance does not remain constant all the time. When the current passes through a material, it heats up. When the temperature of the material changes, the resistance changes. So when the resistance changes, and we divide the voltage across the resistor by the current passing through it, we will not get the same numbers always.

Fundamentalquantities are those physical quantities that cannot be expressed in terms other quantities. It is independent on its own. For example: Mass, Length, time, temperature, electric current

Some physicalquantitiesare morefundamentalthan others. In physics, there are sevenfundamentalphysicalquantitiesthat are measured in base or physicalfundamentalunits: length, mass, time, electric current temperature, amount of substance, and luminous intensity

Plz like my answer and accepted as best plz

Some physicalquantitiesare morefundamentalthan others. In physics, there are sevenfundamentalphysicalquantitiesthat are measured in base or physicalfundamentalunits: length, mass, time, electric current temperature, amount of substance, and luminous intensity.

Fundamental quantitiesare those physicalquantitiesthat cannot be expressed in terms otherquantities. It is independent on its own. For example: Mass, Length, time, temperature, electric current.

Mass,length,time, temperature, electric current

P=VI a)I=P/V=1500/15=6A

b)energy=PT=1.5kw×50h=750kwh

c)cost=750 ×60=45000 rupees.

An electric geyser is running over energy consumed and rate could be determined by heat produced in the electricity.

This operates with each unit and an electric Geyser rated at 1500 V operates on normal speed.

mass×distance×velocity of the planet

(1) r is the best option for this

option 1 is the right answer

r is the right answer

option 1 is the right answer

option 1 is the right answer

option 1 is the right answer

option 1 is the right answer

option (1) is the right answer

option a. is the right answer

the correct answer is c

Ans :- The force that causes objects to float. According to the principle of Archimedes, when a solid is placed in a fluid (a liquid or a gas), it is subject to an upward force equal in magnitude to the weight of the fluid it has displaced.

Buoyant force is the upward force that is exerted by a fluid on an immersed object. For example: if you try to completely immerse a ball in a tub of water, the ball bounces back to the surface. this is because of buoyant force.

Thanks for the answer

Buoyant force is the upward force exerted on an object that is wholly or partly immersed in a fluid. It is due to buoyant force that a body submerged partially or wholly in a fluid appears to lose its weight i.e. appears to be lighter.

M = 2 kgx = t^3 /3 m/s , dx = t² dtv = dx/dt = t²a = dv/dt = 2 tforce = m a = 4 tdW = force * dx = 4 t dx = 4 t³

Work done during t = 0 to 2 sec is found by integration W = [ t^4 ]_0 ^2 = 16 J

speed is a distance travels per unit of time is called speed

2nd method

thanks

option(1) is correct

Answer = 200watt hour

Thank you so much brother

Electrical energy = 60×10 = 600 watt-hour = 600×3600 joule = 2160000 joule

answer is 3J option d

but why????

is it correct?

yahh

tell me why

first find acc. by differentiating displacement two times then find force =m×a then displacement in 2 seconds is of 1m then multiply force and displacement to get work done

plz solve it & send me pic

mera ans. tele nahi ho rha

bro i am solving the question which u gave before let me solve it I will send sol for both

k

or u will send it in my phone no. is 9409647647 as it is my parent's phone

if u can do whatssapp

sorry bro i will be sending here only and dont share ur no.its a public place

k

and another one?

The charge of any charged body in this universe is always a multiple of the charge of an electron. So the minimum charge of a body is±e( where e≈ 1.602×10^-19 Coulumb)

so a charge having value of 1/2(e) is not possible.as charge is always in multiple of Ne. where N is an integer.