Question

WHY IS RESISTANCE LESS WHEN RESISTORS ARE JOINED IN PARALLEL?

WHAT HAPPENS TO THE RESISTANCE OF A WIRE IF IT IS MADE THINNER?

WHAT PHYSICAL QUANTITY REMAINS CONSTANT WHEN RESISTANCES ARE CONNECTED IN PARALLEL?

WHAT IS THE UNIT OF MEASUREMENT OF CHARGE?

WHAT IS THE COMMERTIAL UNIT OF ELECTRIC ENERGY?

WHAT IS THE VALUE OF CHARGE OF AN ELECTRON IN COULOMB?

WHAT IS THE RESISTANCE OF AN IDEAL AMMETER?

THOUGH,THE SAME CURRENT FLOWS THROUGH THE LINE WIRES OR FILAMENT OF A BULB,YET ONLY LATTER GLOWS.WHY?

WHY DOES RESISTANCE OF A CONDUCTOR INCREASE WITH INCREASE IN TEMPERATURE?

HEAT IS GENERATED CONTINUESLY IN AN ELCTRIC HEATER, BUT IT'S TEMPERATURE BECOMES CONSTAN AFTER SOME TIME,WHY?

WHAT IS THE DIFFERENCE BETWEEN RESISTANCE AND RESISTIVITY?

WHEN A POTENTIAL DIFFERENCE OF 1.2 VOLT IS APPLIED ACROSS A CONDUCTOR,THE CURRENT FLOWING IN IT IS 0.25 AMPERE.CALCULATE THE RESISTANCE OF THE CONDUCTOR?

AN ELECTRIC HEATER IS RATED AT 1500 WATTS.CALCULATE THE HEAT PRODUCED PER HOUR?


PLEACE ANSWER ALL OUESTIONS SEPERATELY BY THEIR RESPECTIVE NUMBERS(I mean not to answer them all in a paragraph).

Answer 1

but we're not able to answer all of ur questions at once as they are too many

Answer 2

Answer:

WHAT HAPPENS TO THE RESISTANCE OF A WIRE IF IT IS MADE THINNER?

So, when the conductor is made thinner, its area of cross-section will decrease, since resistance is inversely proportional to the area of the conductor. Therefore, its resistance will increase.

WHAT PHYSICAL QUANTITY REMAINS CONSTANT WHEN RESISTANCES ARE CONNECTED IN PARALLEL?

Voltage

when resistances are connected in parallel Potential difference (voltage) remains constant.

WHAT IS THE UNIT OF MEASUREMENT OF CHARGE?

Coulomb

Coulomb, unit of electric charge in the metre-kilogram-second-ampere system, the basis of the SI system of physical units. It is abbreviated as C. The coulomb is defined as the quantity of electricity transported in one second by a current of one ampere.

WHAT IS THE COMMERTIAL UNIT OF ELECTRIC ENERGY?

kWh

Answer: The commercial unit of electrical energy is a kilowatt-hour (kWh). The electric energy used in factories, industries and houses which are measured in kWh.

WHAT IS THE VALUE OF CHARGE OF AN ELECTRON IN COULOMB?

Electron charge, (symbol e), fundamental physical constant expressing the naturally occurring unit of electric charge, equal to 1.602176634 × 10−19 coulomb.

WHAT IS THE RESISTANCE OF AN IDEAL AMMETER?

zero resistance

An ideal ammeter has zero resistance. A “clamp-on” ammeter measures current through a wire by measuring the strength of the magnetic field around it rather than by becoming part of the circuit, making it an ideal ammeter.

THOUGH,THE SAME CURRENT FLOWS THROUGH THE LINE WIRES OR FILAMENT OF A BULB,YET ONLY LATTER GLOWS.WHY?

The resistance of electric line wires is very, very less than that of the filament of the bulb. Therefore, the current through high resistance filament produces more heat which makes it glow.

WHY DOES RESISTANCE OF A CONDUCTOR INCREASE WITH INCREASE IN TEMPERATURE?

The resistance of a conductor increases with an increase in temperature because the thermal velocity of the free electrons increase as the temperature increases. ... This results in an increase in the number of collisions between the free electrons.

HEAT IS GENERATED CONTINUESLY IN AN ELCTRIC HEATER, BUT IT'S TEMPERATURE BECOMES CONSTAN AFTER SOME TIME,WHY?

When the temperature of the heater becomes greater than the temperature of the surrounding, some of the heat is lost to the surroundings in the form of thermal radiations. ... Hence, the temperature of the element becomes constant.

WHAT IS THE DIFFERENCE BETWEEN RESISTANCE AND RESISTIVITY?

Resistance is the physical property of a substance because of which it opposes the flow of current i.e. electrons. Resistivity is the physical property of a particular substance which is having particular dimensions. ... Resistivity is only proportional to the nature and temperature of the particular material.

AN ELECTRIC HEATER IS RATED AT 1500 WATTS.CALCULATE THE HEAT PRODUCED PER HOUR?

Therefore, the heater produces 1.5 kWh energy, or 5400000 joules every hour.