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1 hp = 745.699872 wTherefore 2.5 hp = 1864.249 w

Power rating of the bulb: 100 WDuration used each day: 4 hrNumber of days: 15

Total energy consumed by the electric bulb: = power * duration = 100 W * 4 hrs/day * 15 days = 6000 W-hrs = 6 kWh

So energy consumed is 6 units.

I= .67 amp is the correct answer of the given question

There is no current division in a series circuit.Current flow through the component is the same.

Resistances are connected in series.Hence,R=0.2+0.3+0.4+0.5+12=13.4ohms

potential difference,V=9V

I=V/R=9/13.4=0.671 A

Therefore,the amount of current that would flow through 12ohm resistor would be 0.671A

Since , V is directly proportional to I , so when current increase voltage will also increase , they are proportional to each other

Voltage and current are proportional to each other i.e if current increases then the voltage will decrease and vise versa.

Work= 600J = 600J

Time= 5 minutes = 5 x 60= 300 seconds

Power = Work/Time = 600/300 = 2 W

Fuse is used for protecting appliances due to short-circuiting or overloading. The fuse is rated for a certain maximum current and blows off when a current more than the rated value flows through it.

If a fuse is replaced by one with larger ratings, the appliances may get damaged while the protecting fuse does not burn off. This practice of using fuse of improper rating should always be avoided.Like if you find it useful

Fuseisusedfor protectingappliancesdue to short-circuiting or overloading. Thefuseisratedfor a certain maximum current and blows off when a current more than theratedvalue flows through it. ... This practice of usingfuseof improperrating shouldalways be avoided.

a) This is the rating of that appliancesthat shows the permissible valuesb)Power = Voltage x current60W= 150* currentcurrent = 60/150= 2/5 AMPERE = 0.4 A

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Ans :- Heat energy

Converting light energy toheatenergy: Solar cookersconcentratesunlight onto a receiver such as a cooking pan.

what did dhira find in the shoes

If I am travelling in a Bus then the Person sitting near us in bus will be in rest with respect us.

Since, rest and motion are relative terms we need some frame of reference to decide whether the body is in motion or rest.

We all know that Earth is in motion but still it is considered as Inertial Frame.

All the bodies which are in motion or rest are decided with respect to it.

option 4 may be an answer.it can either be variable or uniform acceleration

option 2 is correct

explain it

using the second equation o motion u and v for train will be zero. for minimum time maximum acceleration will be needed and hence the distance is d. thus d = 1/2*a*t^2 now time t = root(2d/a)

but answer is 4th option

Anoptimal solutionis a feasiblesolutionwhere the objective function reaches its maximum (or minimum) value – for example, the most profit or the least cost. A globallyoptimal solutionis one where there are no other feasible solutions with better objective function values.

All the terms there,except Force only,are scalar quantities. Force is a vector quantity.

momentum, dancing girl

90 is a right answer because

because out side 45° and in side 45° is called 90°

90 is right because it is 45 45 and 90 angle

answer is C 90° because the mid point is of 45° it is happened possible in right angle triangle with 90° angle

9is correct answer in this questions

Heat gained by copper = m × C × θ = 50 × 0. 39 × (T − 18)

Heat lost by water = 45 × 4. 2 × (50 − T)

Heat lost = Heat gained

45 × 4. 2 × (50 − T) = 50 × 0. 39 × (T − 18)

9450 − 189 T = 19. 5 T − 351208. 5 T = 9801 Or T = 47°C (Approx)

They are basically of 2 types –1)Fixed Resistor and2)Variable ResistorsClassification of Resistors:From operating conditions point of view, resistors can be classified into two.1) Fixed resistors2) Adjustable/ variable resistors

1) Fixed resistors are further classified into:a) Carbon composition type resistors b) Metalized type resistors c) Wire wound type resistorsa) Carbon composition type resistors:This is the most common type of low wattage resistor. The resistive material is of carbon-clay composition and the leads are made of tinned copper. These resistors are cheap and reliable and stability is high.b)Wire wound resistors:These resistors are a length of wire wound an insulating cylindrical core. Usually wires of material such as constantan (60% copper and 40% nickel) and manganin which have high resistivities and low temperature coefficients are employed. The completed wire wound resistor is coated with an insulating material such as baked enamel.c) Metalized resistorsIt is constructed using film deposition techniques of depositing a thick film of resistive material onto an insulating substrate.Only approximate values of resistance can be had by this method.2) Variable resistorsFor circuits requiring a resistance that can be adjusted while it remains connected in the circuit(for eg: volume control on radio), variable resistors are required. They usually have 3 lead two fixed and one movable.

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velocity as rest is scalar quantity and velocity is vector quantity

First find the deformed length of the springs.

Spring 3: l = √((.15m)2 + (.3m)2) l = 0.3354 m Δx3 = 0.3354m - 0.15m Δx3 = 0.1854m Spring 2: l = √((.15m)2 + (.15m)2) l = 0.21213 m Δx2 = 0.21213m - 0.15m Δx2 = 0.06213m

Spring 1: Undeformed Δx = 0m

Now, Ei = PE (from the deformed springs, no KE or U) Ei = 1/2k1(Δx1)1 + 1/2k2(Δx2)2 + 1/2k3(Δx3)3 Ei = 1/2(400N/m)(0m)2 + 1/2(400N/m)(0.06213m)2 + 1/2(400N/m)(0.1854m)2 Ei = 7.6459J

From the Law of Conservation of Energy Ei = Ef and velocity will be max when there is no spring potential energy restricting the collar and only KE. Ef = 1/2mv2 7.6459J = 1/2(1.2kg)v2 3.57 m/s = v

ΔQ = MSΔT = 100 x 10^-3x 4.184 x20= 8.4 X 10^3

ΔQ = 84 kJ, ΔW = 0

ΔQ = ΔV + ΔW

V = 8.4 kJ

1 . E 2 . F3 . A4 . B

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the answer is b) two poles

c) north pole in comparison with the south pole

1)Two important conditions for total internal reflection are:

Angle of incidence (i) should be greater than critical angle (ic).

Ray should travel from denser medium to rarer medium.

1)Graphics Interchange Format (GIF) is a bitmap image format that was introduced by CompuServe in 1987. It also supports animations and allows a separate palette of 256 colors for each frame

2)"JPEG" stands for Joint Photographic Experts Group, thenameof the committee that created theJPEGstandard and also other still picture coding standards. ... The Exif and JFIF standards define the commonly used file formats for interchange ofJPEG-compressed images.

3)PNGstands for Portable Network Graphics. It was created as an open format to replace GIF, because the patent for GIF was owned by one company and nobody else wanted to pay licensing fees. It also allows for afullrange of color and better compression

option a