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 ARGON, COPPER, SILVER

Argon, copper, silver are DIAMAGNETIC.

 ELECTRONS

The SI UNIT of RESISTANCE is electrons.

 Decreases

When water freezes its DENSITY decreases. Water at ordinary temperatures contracts and increases in density as it is cooled, like most substances. But at about 4°C it reaches a maximum density and then decreases in density as it APPROACHES the FREEZING POINT.

 The opposite direction of the MOTION

The part which is tangent to the contacting surfaces is called the frictional FORCE. Friction is a resisting force that acts on a BODY to prevent or retard its motion. Friction force always acts tangent to the surface at points of contact. Friction force acts opposite to the direction of motion.

 DISTANCE

Light YEAR is a UNIT of distance.

 POLARISATION

Electromagnetic WAVES are TRANSVERSE in NATURE is EVIDENT by Polarisation.

 Saw dust is POOR conductor of heat.

Ice packed in SAWDUST does not melt quickly because it PROVIDES insulation.

 MASS

The AMOUNT of MATTER in a BALL of STEEL is its mass.

 3

Initial SPEED = U = 18 km/hr = 5 m/s
Final speed = V = 72 km/hr = 20 m/s
acceleration a = (v-u)/t = (20 - 5)/5 = 3 m/s².

 Poles

A perfect SPHERE of spherically uniform density (density VARIES solely with distance from centre) would produce a gravitational field of uniform magnitude at all points on its surface, always pointing directly towards the sphere’s centre. However, the Earth deviates slightly from this ideal, and there are consequently slight deviations in both the magnitude and direction of gravity across its surface. Furthermore, the net force exerted on an object due to the Earth, called “effective gravity” or “apparent gravity”, varies due to the presence of other factors, such as inertial response to the Earth’s rotation. A scale or plumb BOB measures only this effective gravity. The major reason for the difference in gravity at different latitudes is that the Earth’s equatorial bulge (itself also CAUSED by inertia) causes objects at the Equator to be farther from the planet’s centre than objects at the poles. Because the force due to gravitational attraction between two bodies (the Earth and the object being weighed) varies inversely with the SQUARE of the distance between them, an object at the Equator experiences a weaker gravitational pull than an object at the poles.

 CIRCULAR MOTION of electrons

Magnetism is CAUSED by the motion of ELECTRIC CHARGES.

 SHIFTED downwards

If an empty cylinder is HALF FILLED with a liquid, its center of GRAVITY is shifted downwards.

 High energy

A wave with a large AMPLITUDE will be particularly tall, and a wave with a SMALL aptitude will be particularly short. It TURNS out that the amplitude TELLS you how much energy is in the wave. A high amplitude wave is a high-energy wave, and a low-amplitude wave is a low-energy wave.

 Seismograph

The INSTRUMENT for MEASURING intensity of EARTHQUAKES is called Seismograph.

 CIRCLE the WIRE in CLOSED LOOPS

Magnetic FIELD lines about a current-carrying wire circle the wire in closed loops.

 Both A & B

The CAPACITY of a water HEATER is measured in LITRES and METRES.

 Speed

Speed is not a VECTOR quantity. It has only magnitude and no DIRECTION and HENCE it is a SCALAR quantity.

 10^-7 CM

One NANOMETER is EQUAL to 10^-7 cm.

 Convex lens

Convex mirror is used as a rear view mirror in the vehicles because convex mirror ALWAYS FORMS virtual, erect and DIMINISHED images irrespective of distance of the object. A convex mirror ENABLES a driver to view large area of the traffic behind him.

 Convection

When a pot of WATER is PLACED on the stove to boil, conduction heat warms up the pot, which then heats the water molecules inside. As these molecules heat, convection causes them to MOVE AWAY from the interior of the pot as they are replaced by cooler molecules.

 Fixed frequency

Frequency modulation (FM) CONVEYS information over a carrier wave by VARYING its instantaneous frequency. This contrasts with amplitude modulation, in which the amplitude of the carrier is varied while its frequency remains constant. Frequency modulation is ALSO used in telemetry, RADAR, seismic prospecting and newborn EEG SEIZURE monitoring. Frequency modulation is known as phase modulation when the carrier phase modulation is the time integral of the FM signal. FM is widely used for broadcasting music and speech, two-way radio systems, magnetic taperecording systems and some video-transmission systems.

 The stone conveys the heat away from the feet more RAPIDLY than the carpet

Both the FLOOR and the carpet have the same TEMPERATURE as both are EXPOSED to the same atmosphere. So the feet LOSING more heat, the floor appears cooler to the feet.

 Volume, Temperature & Pressure

The COMBINED gas law allows you to DERIVE any of the RELATIONSHIPS needed by combining all of the changeable pieces in the IDEAL gas law: namely pressure, temperature and volume.

 Neutron Star

The mass of a star which is two times the mass of the sun turns into a neutron star. A neutron star is a type of stellar remnant that can result from the gravitational collapse of a massive star during a Type II, Type Ib or Type Ic supernova event. Such stars are composed ALMOST entirely of neutrons, which are subatomic particles without electrical charge and with SLIGHTLY larger mass than protons. Neutron stars are very hot and are supported against further collapse by quantum degeneracy pressure due to the Pauli’s EXCLUSION principle. This principle states that no two neutrons (or any other fermionic particles) can occupy the same place and quantum state simultaneously. A typical neutron star has a mass between about 1.4 and 3.2 solar masses ( Chandrasekhar Limit), with a corresponding radius of about 12 km if the Akmal– Pandharipande–Ravenhall equation of state (APR EOS) is USED.

 Silver

Silver has the MAXIMUM THERMAL CONDUCTIVITY.

 Below FREEZING point

Supercooling is the process of chilling a liquid below its freezing point, without it BECOMING solid. A liquid below its freezing point will CRYSTALLIZE in the presence of a SEED crystal or nucleus around which a crystal structure can FORM.

 Faraday's LAW of Electromagnetic INDUCTION

An Electric GENERATOR works on the PRINCIPLE of Faraday's law of Electromagnetic Induction.

 Incident on rain drops HANGING in the atmosphere is DISPERSED after suffering refraction and internal REFLECTION.

Rainbows are PRODUCED when SUNLIGHT incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection.

 MOMENT of FORCE

The rotational effect of a force on a body about an AXIS of rotation is DESCRIBED in terms of moment of force.

 COOLIDGE TUBE

Coolidge tube is USED to PRODUCE X-ray.

 Centripetal force

As a car makes a TURN, the force of friction acting UPON the TURNED wheels of the car provides centripetal force required for circular motion. As a bucket of WATER is tied to a string and spun in a circle, the tension force acting upon the bucket provides the centripetal force required for circular motion.

 A fraction of a SECOND

Atomic hydrogen is UNSTABLE and it has life PERIOD of a fraction of a second.

 Turbines

A machine powered by ROTATING blades is a turbines. A turbine is a device that harnesses the kinetic energy of some fluid - such as water, steam, air, or COMBUSTION gases - and TURNS this into the ROTATIONAL motion of the device itself.[2] These devices are generally used in electrical generation, engines, and propulsion systems and are classified as a type of engine.

 3

There are 3 LAWS of PHYSICS.

 INDUCED current

Fleming's right-hand rule (for generators) SHOWS the direction of induced current when a conductor attached to a circuit moves in a magnetic field. It can be USED to determine the direction of current in a GENERATOR's windings.

 ANGULAR MOMENTUM

Angular momentum is a VECTOR QUANTITY.

 INTENSITY of illumination

The SI unit of intensity of illumination (ILLUMINANCE) is the lux. An illuminance of 1.0 lux is produced by 1.0 lumen of light shining on an area of 1.0 m².

 Four TIMES

When the WIRE is STRETCHED to double the length , the AREA of cross section gets reduced to HALF. So when the wire is stretched, the resistance multiplies by four times.

 Both A & B

Land breeze OCCUR during FALL and winter.

 40

 There is less wastage of energy

The primary reason that power is transmitted at HIGH voltages is to increase efficiency. As electricity is transmitted over LONG DISTANCES, there are INHERENT energy losses ALONG the way.

 Very SHORT NUCLEAR SIZE

Very short nuclear size is the RANGE of STRONG nuclear force.

 Remains the same

The same current flows through each resistor in SERIES. INDIVIDUAL resistors in series do not get the total source voltage, but divide it. The total resistance in a series CIRCUIT is equal to the SUM of the individual resistances: RN(series)=R1+R2+R3+… +RN.

 INDUCE high voltage

When the switch is ON, in a TUBE light CHOKE is NOTHING but the coil/ballast (inductor) which is USED to induce the high voltage across it.

 D.C. and A.C. CIRCUITS both

Kirchhoff's LAWS are APPLICABLE to both D.C. and A.C. circuits.

 ELEMENT

The COIL WIRE in the electric room HEATER or electric COOKING heater is called element.

 Alpha PARTICLE

Since alpha particle has higher mass than ELECTRON, PROTON and DEUTERON, its MOMENTUM will be maximum.

 Capillary action

Capillary action is the result of adhesion and SURFACE tension. Adhesion of water to the walls of a vessel will cause an UPWARD force on the liquid at the edges and result in a meniscus which turns upward. The surface tension acts to hold the surface intact, so instead of just the edges MOVING upward, the WHOLE liquid surface is DRAGGED upward.

 Diffusion

When a bottle of perfume is opened in a corner of a room, the scent soon spreads all over the room. This physical procedure is called diffusion, DUE to which the LIQUID or gaseous molecules travels from the area of HIGHER density to that of the lower density of that substance.

 STEPHEN Hawking

Stephen Hawking is the WRITER of the BOOK 'A BRIEF History of Time'.