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Themagnetic meridianis an equivalent imaginary line connecting themagneticsouth and north poles and can be taken as the horizontal component ofmagneticforce lines along the surface of the earth. Therefore, a compass needle will be parallel to themagnetic meridian

Advantages of Heating effect of current:

1. The heating effect of electric current is put to good use in room heaters and water heating coils where electricity is converted into heat energy.

2. An electric bulb also exploits the effect. The filament of the bulb is made of Tungsten metal, which glows when heated by the electric current flowing through it, thus giving out light.

3. An electric fuse also uses the heating effect of electric current. A fuse is rated for a specific amperage. When the current through it exceeds its rating, the heat produced melts the fuse wire thus opening the circuit.

The heating effect of current is used in devices like heaters. It can also melt the insulation and cause short circuit.

Heating effect is not seen in electric motor. Electric motor converts electric energy to mechanical energy.

Option A) Oerested is correct.

Correct option: aReason: The line joining the points of horizontal component of Earth's magnetic field is called magnetic axis.

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Magnetic Fieldis said to exist in a region if a (Magnetic) Force can be exerted on aMagnet.Magnetic FieldLines (Flux Lines) are imaginary lines representing the direction and strength of theMagnetic Field. ... When placing like Poles of twoMagnetstogether, theMagnetsrepel each other, Figure 2

Amagnetic fieldis the area around amagnet,magneticobject, or an electric charge in whichmagneticforce is exerted.” Let's put it this way. The invisible area around amagneticobject that can pull anothermagneticobject toward it or push anothermagneticobject away from it is called amagnetic field.

Themagnetic fieldis the area around amagnetin which there ismagneticforce. Moving electric charges can makemagnetic fields.Magnetic fieldscan usually be seen bymagneticflux lines. At all times the direction of themagnetic fieldis shown by the direction of themagnetic

Themagnetic fieldis the area around amagnetin which there ismagneticforce. Moving electric charges can makemagnetic fields.Magnetic fieldscan usually be seen bymagneticflux lines. At all times the direction of themagnetic fieldis shown by the direction of themagneticflux lines.

Juggling is hard.Keeping those balls aloft against the relentless forces of gravity takes skill.But what if you could just make gravity work a little bit differently? With the Feel Flux, you can. The Feel Flux is the toy of your high school physics teacher's dreams. The little pinball is a piece of neodymium: a rare Earth metal with a very powerful magnetic force.

Themagnetic fieldis the area around amagnetin which there ismagneticforce. Moving electric charges can makemagnetic fields.Magnetic fieldscan usually be seen bymagneticflux lines. At all times the direction of themagnetic fieldis shown by the direction of themagneticflux lines

The magnetic feild is the area around a magnet in which there is magnetic force.The magnetic feild is shown by the direction of the magnetic flux lines....

Themagnetic fieldis the area around amagnetin which there ismagneticforce. Moving electric charges can makemagnetic fields.Magnetic fieldscan usually be seen bymagneticflux lines. At all times the direction of themagnetic fieldis shown by the direction of themagneticflux lines.

A magnetic field is a vector field that describes the magnetic influence of electric charges in relative motion and magnetized materials. The effects of magnetic fields are commonly seen in permanent magnets, which pull on magnetic materials and attract or repel other magnets.

R=V/I=250/5=50ohmHenceHeat is I^2Rt=5*5*50*10*60=750000Joules

correct option is (b)

It is magnetic field strength represented in terms of number of magnetic field lines (flux) passing through unit area perpendicular to the field lines. Unit : Tesla

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Velocity ratiois alsodefinedas theratioof a distance through which any part of a machine moves, to that which the driving part moves during the same time. An object has a mechanical advantage if it exerts a force higher than thevelocity ratio.

wrong

First Law of Faraday's Electromagnetic Induction state that whenever a conductor are placed in a varying magnetic field emf are induced which is called induced emf, if the conductor circuit are closed current are also induced which is called induced current.

Faraday's Second law of electromagnetic induction states that, the magnitude of induced emf is equal to the rate of change of flux linkages with the coil. The flux linkages is the product of number of turns and the flux associated with the coil.

Electromagnetic or magnetic induction is the production of an electromotive force across an electrical conductor in a changing magnetic field. Michael Faraday is generally credited with the discovery of induction in 1831, and James Clerk Maxwell mathematically described it as Faraday's law of induction.

7. Dispersion: The splitting of white light into its constituent seven colours is called dispersion of light.

8. Electromagnetic induction is the production of voltage or electromotive force due to a change in the magnetic field.

Electromagnetic or magnetic induction is the production of an electromotive force across an electrical conductor in a changing magnetic field. Please like the solution 👍 ✔️

Whenever a conductor is placed in a varying magnetic field an EMF gets induced across the conductor (called as induced emf), and if the conductor is a closed circuit then induced current flows through it.Magnetic field can be varied by various methods -1. By moving magnet2. By moving the coil3. By rotating the coil relative to magnetic field

Faraday's second law of electromagnetic induction states that, the magnitude of induced emf is equal to the rate of change of flux linkages with the coil. The flux linkages is the product of number of turns and the flux associated with the coil.

electromagnetic induction = it is the production of potential due to change in magnetic field around a coil

frequency of ac supply in India is 50 Hz

Whenever themagnetic fluxlinked with an electric circuit changes, an emf is inducedin the circuit. This phenomenon is calledelectromagnetic induction.

Electromagnetic ormagnetic inductionis the production of an electromotive force (i.e., voltage) across an electrical conductor in a changingmagneticfield. Michael Faraday is generally credited with the discovery ofinductionin 1831, and James Clerk Maxwell mathematically described it as Faraday's law ofinduction.

Electric generator, also called dynamo, any machine that converts mechanical energy to electricity for transmission and distribution over power lines to domestic, commercial, and industrial customers. Generators also produce the electrical power required for automobiles, aircraft, ships, and trains.The mechanical power may come from a number of sources: hydraulic turbines at dams or waterfalls; wind turbines; steam turbines using steam produced with heat from the combustion of fossil fuels or from nuclear fission; gas turbines burning gas directly in the turbine; or gasoline and diesel engines .The mechanical power for an electric generator is usually obtained from a rotating shaft

Magnetic induction is the magnetic flux or flux density.It's unit is Tesla.

A halogen lamp is an incandescent light source. It consists of a tungsten filament, enclosed in an environment of an inert gas and a small amount of a halogen (bromine or iodine). The combination of the tungsten filament and the halogen results in a chemical reaction called the halogen cycle, which increases the lifetime of the filament.

Halogen lamps are widely used in optical systems, mainly due to their compact size and efficient casting of light. Enhancements in the design of the halogen lamps, such as the provision of integral reflectors, enable redirection of light into the illumination system in an orderly manner. This datasheet will look into the working, construction, and application areas of these lamps.

It's a pretty straightforward process. There are three steps:

Write a KVL equation. Because there's a capacitor, this will be a differential equation.Solve the differential equation to get a general solution.Apply the initial condition of the circuit to get the particular solution. In this case, the conditions tell us whether the capacitor will charge or discharge.Let's go through this. Instead of using an actual step function, I'm going to use a DC input and assume the capacitor starts out discharged. First, you write a KVL equation:

Vi=vR+vCIn circuit analysis, we like to use current instead of charge. So instead of Q=CV, we use i=CdVdt. The resistor and capacitor share the same current, so:

iR=iC=CdvCdtYou can put this into the KVL equation:

vR=RiR=RiC=RCdvCdtVi=RCdvCdt+vCThis is a first-order linear differential equation. Using, some algebra, you can rearrange it into a solvable form:

RCdvCdt=Vi−vcdvCVi−vC=dtRCIntegrating both sides gives:

−ln(Vi−vC)=tRC+C0You can get rid of the ln by moving the negative sign and making both sides a power of e:

Vi−vC=e−t/RC+C0=e−t/RCeC0C0 is a constant of integration, so eC0 is also a constant. Let's rename it to C1 for convenience:

Vi−vC=C1e−t/RCThe differential equation is solved, but there's still an unknown (C1). You can find its value if you know the initial condition of the circuit. In this case, I said that the capacitor started out discharged (vC=0 at t=0), so let's use that:

Vi−0=C1e−0/RC=C1⋅1C1=ViNow you can find the fully-solved equation:

Vi−vC=Vie−t/RCvC=Vi−Vie−t/RCvC=Vi(1−e−t/RC)Is this correct? At t=0, you have:

vC=Vi(1−1)=0and at t=∞, you have:

vC=Vi(1−0)=ViSo the capacitor starts out discharged, ends up fully-charged, and in between there's an exponential decay. That's correct!

For the discharge, Vi=0 and the initial condition is that the capacitor is charged to a nonzero value, which I'll call V0. You can use these to solve for C1 again:

0−V0=C1e−0/RCC1=−V0−vC=−V0e−t/RCvC=V0e−t/RC

In this instance all the planets, asteroids, comets and whatever else would retain their forward motion. Therefore, rather than fall towards the now nonexistent Sun, they would fly off in a straight line into space.

The earth requires 24 hours for one rotation. In one hour,

Being kidnapped is one of the worst experience that anyone could go throw. During that moment, the thoughts seem to be haphazard and choked. The person might be confused about it and would like to know how would he/she get out of the situation.

1.Anelectric generatorworks on theprincipleof Faraday's law of electromagnetic induction. Faraday's law of electromagnetic inductionstatesthat “whenever a current carrying conductor are placed in the magnetic field, then a flux is induces in the circuit due to which a current start to flow in the rotor also.

2.Some sources of direct current are cell,batteryand DC generator, etc.

Speed of light

Rectilinear propagation of light

Frequency of light

The reflector telescope uses a mirror to gather and focus light. All celestial objects (including those in our solar system) are so far away that all of the light rays coming from them reach the Earth as parallel rays. Because the light rays are parallel to each other, the reflector telescope's mirror has a parabolic shape. The parabolic-shaped mirror focusses the parallel lights rays to a single point. All modern research telescopes and large amateur ones are of the reflector type because of its advantages over the refractor telescope.Advantages

Reflector telescopes do not suffer from chromatic aberration because all wavelengths will reflect off the mirror in the same way.

Support for the objective mirror is all along the back side so they can be made very BIG!

Reflector telescopes are cheaper to make than refractors of the same size.

Because light is reflecting off the objective, rather than passing through it, only one side of the reflector telescope's objective needs to be perfect.

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Bragg's Law. When x-rays are scattered from a crystal lattice, peaks of scattered intensity are observed which correspond to the following conditions:

The angle of incidence = angle of scattering.

The pathlength difference is equal to an integer number of wavelengths

Hubble's Orbit. Hubble orbits theEarthabout every 97 minutes at an altitude of about 353 miles (569 kilometers). Hubble passes into the shadow of theEartheach orbit for about 28-36 minutes.

A parallel beam of light from a heavenly body such as stars, planets or satellites fall on the objective lens of the telescope. The objective lens forms a real, inverted and diminished image A’B’ of the heavenly body. This image (A’B’) now acts as an object for the eye piece E, whose position is adjusted so that the image lies between the focus fe’ and the optical centre C2 of the eye piece. Now the eye piece forms a virtual, inverted and highly magnified image of object at infinity. When the final image of an object is formed at infinity, the telescope is said to be in ‘normal adjustment’.

It should be noted that, the final image of object (such as stars, planets or satellites) formed by an astronomical telescope is always inverted with respect to the object. But it does not matter whether the image formed by an astronomical telescope is inverted or not, as all the heavenly bodies are usually spherical is shape.

earthquake is a sudden shaking (or trembling) of the earth which lasts for a very short time. An earthquake is caused by the violent movements of rocks deep inside the earth's crust. Earthquakes can cause immense damage to houses, other buildings, bridges, dams and people, etc.

Visual Display Unit (VDU)

The Indian Astronomical Observatory stands at an altitude of 4,500m (14,800ft) on Mount Saraswati in Ladakh, India.

first increases and then decreaes

Vertical component gradually decreases then increases.

Earthquakes are tremors or shaking of the earth which lasts for a short time. It can cause the ground to tremble and shake. They occur all the time at different places around the earth. Earthquake can occur on land or under the sea floor. They occur at different intensities, some being strong, most being weak. Strong earthquakes can damage buildings, roads, dams and other constructions and can make them fall. Due to this many people can get hurt or killed. Earthquakes also cause landslides, flood and tsunamis when they occur.

An earthquake is the shaking of the surface of the Earth, resulting from the sudden release of energy in the Earth's lithosphere that creates seismic waves