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Given A = 2i+3j and B = i+4j .

Area of paralleogram A x B = (2i+3j+0k) x(i+4j+0k)

For i component we have,

(3 * 0) - (4 * 0) = 0

For j component we have,

(0 * 2) - (1 * 0) = 0

For k component we have,

(2 * 4) - (1 * 3) = 5.

Now take the magnitudeof this vector to find the area of the parallelogram:

A * B = Whole root of 0^2 + 0^2 + 5^2

= 0 + 0 + 5(Square and root will be cancelled)

= 5 units.

v=w/k=314/1.57=200 unit

Power =force * displacement / timegivenP=0.98 kWm=100 kgs=4 mu= 0.3( from s=at sqr)F=mu ma (a = s/t sqr)0.3*100*4/t sqr120/t sqrpower =force * displacement / time0.98 kW = 120/t sqr * 4/t

Joule is the unit for energy

Dimension Formula for Joule is [M¹L²T⁻²]

Let n1(joule)=n2(erg)

n1(M₁¹L₁²T₁⁻²]=n2[M₂¹L₂²T₂⁻²]

n2=n1(M₁¹L₁²T₁⁻²]/M₂¹L₂²T₂⁻²]

=n1x(M1/M2)¹x(L1/L2)²x(T1/T2)⁻²

=1x(1kg/gm)¹x(1m/1cm)²x(1s/1s)⁻²

=1x(1000g/gm)x(100cm/1cm)²x(1s/1s)⁻²

=10⁷Therefore n1(joule)=n2(erg)∴1 Joule=10⁷erg

F=mg=100*10=1000N

No answers is wrong

Gravitational lesson name and subject is science

option (b) torque=P×E=PEsin(theta)

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The answer will be. option D ...0

because here the plane of triangle and the plane of electric Field is parallel to each other.. so, no flux will pass through the area of the triangle..

as flux = B× A

and cross product of two parallel vectors is always 0.

In x- y plane so inside the electric field= 5i+2j+3kflux= 5i+2j+3k*(0i+0j+50k)150Nm^2/Cplease like the solution 👍 ✔️

CIn Fleming left hand rule middle finger is for flow.of current.

An appliedelectric field polarized the dielectric material by orienting the dipole moments of polar molecules. This decreases the effectiveelectric fieldbetween the plates andwillincrease the capacitance of the parallel plate structure

Since the angle from the normal of the area is = 60° so, the angle between the plane of area and the electric Field will be = 90-60 = 30° = ∅

and theFlux is given by = E×A = E.Asin∅

flux = 200* (200) × 10^-⁴ × sin30° = 2*2/2 = 2N-m²/C

To study magnetic field , an electromagnet can be made using iron nal, wire and battery.For making electromagnet, iron nailed is first coiled with wire and then the wire is connected to a battery. When any magnetic material is brought near the bar magnet, it will got attracted towards the magnet . While any non-magnetic material will not get attracted by it. Thus the effect of magnetic field can be studied that a magnet attracts magnetic material or objects. And bar magnet is a parmanent magnet that will always attract magnetic material, unlike iron nail that required a battery connection to work as a magnet . So magnetic field can be studied by comparing magnetism created using two types of magnet that is parmanent magnet that is bar magnet . And temporary magnet that is electromagnet .

Heat produced by a current flowing through a fixed resistance is directly proportional to the square of current...H~I²

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we know thatwork done = force× displacementW= F×s×costheta= (30× 5 ×cos0°)J= 150J

hence, workdone= 150 joules

here the radius of semi circle is R

an electric motor is an electrical machine that converts electrical energy into mechanical energy. Most electric motors operate through the interaction between the motor's magnetic field and winding currents to generate force in the form of rotation.

The fan over the stove and in the microwave oven.

The dispose-all under the sink.

The blender.

The can opener.

a point source is a single identifiable localised source of something. a point source has negligible extent, distinguishing it from other source geometries. e.g.. light passing through a pinhole or other small aperture, viewed from a distance much greater than the size of the hole.

point source of light are points in definition that emit radiation or light. they are minute small points just like in mathematics

Electrical appliance – Fan, washing machine, mixer. Fleming’s Left Hand Rule – It states that ‘‘Stretch the forefinger, the central finger and the thumb of your left hand mutually perpendicular to each other. If the forefinger shows the direction of the magnetic field and the central finger that of the current then the thumb will point towards the direction of force on of the conductor.

An electric motor is an electrical machine that converts electrical energy into mechanical energy. Most electric motors operate through the interaction between the motor's magnetic field and winding currents to generate force in the form of rotation.

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When he moves down

mg-nmg=ma

a=g(1-n)

F = v/4l330/4*0.5165Hzis the answer

find the displacement in centre of mass of the system find end displacement of man with respect to ground. Let X be the displacement of ladder so displacement of man with respect to ground is h-X (we take downward direction as negative). Displacement of centre of mass = [Mx-x(M-m)+m(h-x)]/(M+M-m+m)= mh/2M. (Mass of ladder is M-m the system was initially at rest)

Displacement of center of mass is zero.

Reason: On height gain of man relative to the ladder, ladder as well as stone of mass M adjust their respective heights according to:

F(ext.)*disp. of C.O.M.=ext. work done on the system

and ext. work done=0.

Convex Mirror is a spherical mirror from which image obtained is always virtual and small.

S.I. unit of resistivity is ohm.

Since the length of the wire is doubled, its area of cross-section is halved so as to keep the volume of the wire constant.

Now the resistance of the wire is proportional to length of the wire, since the length of the wire is doubled its resistance also doubles due to doubling of the length. But resistance is also inversely proportional to the area of cross-section, and as area of cross-section ishalved due to doubling of length,the resistance is once more doubled due to the halfing of the area of cross-section. So overall the resistance of the wire bec

Resistivity is proportional to lengthSo,2*l=2*p=2p