Explain why a current carrying conductor placed in a magnetic field experience a force

06/26/2021 0

Explain why a current carrying conductor placed in a magnetic field experience a force The current in the wire setup a magnet field around the ... Read More

Explain the main precautions taken in the construction of an a.c. transformer

06/26/2021 0

Explain the main precautions taken in the construction of an a.c. transformer Low resistance copper wire are used to reduce I2R losses. Laminated core reduce ... Read More

Explain the application of eddy currents

06/26/2021 0

Explain the application of eddy currents. (03marks) Damping a 'galvanometer. In the galvanometer the coil is wound on a metal former. Eddy currents in the ... Read More

Explain how eddy currents can be produced. 

06/26/2021 0

Explain how eddy currents can be produced.  Eddy currents are currents induced in a conductor moving across magnetic field; these currents oppose the motion of ... Read More

Explain why an alternating current apparently flow through a capacitor whereas a direct current does not.

06/26/2021 1

Explain why  an alternating current apparently flow through a capacitor whereas a direct current does not. When a capacitor is connected to a d.c source, ... Read More

Derive an expression for the charge, Q, induced in a coil of N turns when the magnetic flux through it changes

06/26/2021 0

Derive an expression for the charge, Q, induced in a coil of N turns when the magnetic flux through it changes   Please Subscribe to ... Read More

Describe with the aid of a diagram, an absolute method of determining resistance

06/26/2021 0

Describe with the aid of a diagram, an absolute method of determining resistance The circuit is connected as above. The metal disc of known radius ... Read More

State one advantage of a.c over d.c

06/26/2021 0

State one advantage of a.c over d.c c can easily and cheaply be changed from one voltage to another. c can easily be transmitted with ... Read More

Explain why the primary current in the a.c. transformer increases when the secondary coil is connected to the load?

06/26/2021 0

Explain why the primary current in the a.c. transformer increases when the secondary coil is connected to the load?  When a load is connected to ... Read More

How can hysteresis loss be minimized in a.c. transformer?

06/26/2021 0

How can hysteresis loss be minimized in a.c. transformer? It is minimized by using soft magnetic materials like soft iron and perm alloy in which ... Read More

(iii) Explain why on average the power delivered to the inductor in one cycle is zero.

06/26/2021 0

Explain why on average the power delivered to the inductor in one cycle is zero. During the first quarter cycle, when current increases, work is ... Read More

Explain why the voltage at a generating power station must be stepped up to very high value for long distance transmission

06/26/2021 0

Explain why the voltage at a generating power station must be stepped up to very high value for long distance transmission At high voltage current ... Read More

Describe how the damping can be reduced in ballistic galvanometer

06/26/2021 0

Describe how the damping can be reduced in ballistic galvanometer Damping in ballistic galvanometer is reduced in the following ways Winding the coil on non-conducting ... Read More

State why the damping in the ballistic galvanometer should be as small as possible.

06/26/2021 0

State why the damping in the ballistic galvanometer should be as small as possible. When the oscillation in the ballistic galvanometer is damped, the deflection ... Read More

What is a Weber?

06/26/2021 0

What is a Weber? The weber is magnetic flux that passes normally though an area of 1m2. When the magnetic flux density is 1T. Please ... Read More

Explain why a moving coil ammeter is unsuitable for measuring alternating current

06/26/2021 0

Explain why a moving coil ammeter is unsuitable for measuring alternating current.  When an a.c is passed through a moving coil ammeter, the direction of ... Read More

Explain how an alternating current can be measured using a rectifier meter

06/26/2021 0

Explain how an alternating current can be measured using a rectifier meter When a.c is supplied to a rectifier meter, current flows in only one ... Read More

Describe an experiment which can be used to demonstrate self-induction

06/26/2021 0

Describe an experiment which can be used to demonstrate self-induction An iron cored coil is connected in series with a bulb, cell and switch as ... Read More

Explain why a current carrying conductor placed in a magnetic field experiences a force

06/26/2021 0

Explain why a current carrying conductor placed in a magnetic field experiences a force The current sets up magnetic field around the wire. When the ... Read More

Sketch on the same axes the variation with time of the voltage and current is a capacitor is connected to the voltage supply and explain your graph

06/26/2021 0

Sketch on the same axes the variation with time of the voltage and current is a capacitor is connected to the voltage supply and explain ... Read More

Show that when an inductor s connected to an a.c supply voltage of V = V0sin2πft, the resulting current lags the voltage by 900.

06/26/2021 0

Please Subscribe to promote this website. Subscription is free Share with a friend We value your comments Thank you so much Read More

Explain the variations of melting points of chlorides of period 3 elements

06/20/2021 1

Physical properties of chlorides of period 3 elements These are formed by reacting the elements with chlorine gas and the physical properties of their chlorides ... Read More

Explain the variations of boiling points of chlorides of period period 3 elements

06/20/2021 0

Boiling points of chlorides of period 3 elements The table below shows the boiling points of the chlorides of period 3 elements. Element Na Mg ... Read More

Animal production 2021 revision questions

06/18/2021 0

Animal production 2021   By Mungudit Davious Munguthdavious800@gmail.com +256 394847/7531322587 (a) A farmer wants to mix 16% proteins ration using maize which is 8% and ... Read More

A-level Animal production 2021 revision questions

06/18/2021 0

Agriculture revision questions for agriculture 3 Animal production 2021   By Mungudit Davious Munguthdavious800@gmail.com +256 394847/7531322587 (a) A farmer wants to mix 16% proteins ration ... Read More

Agriculture revision questions for agriculture 2 with answers

06/16/2021 0

Agriculture revision questions for agriculture 2 with answers Agricultural Economics 2021 By Mungudit Davious Munguthdavious800@gmail.com +256 394847/7531322587 (a) Describe the factors affecting labor efficiency (10marks)) ... Read More

Agriculture revision questions for agriculture 2

06/15/2021 1

Agriculture revision questions for agriculture 2 Agricultural Economics 2012 By Mungudit Davious Munguthdavious800@gmail.com +256 394847/7531322587 (a) Describe the factors affecting labor efficiency (10marks) (b) Outline ... Read More

Magnetism (A-level) notes

06/12/2021 0

Magnetism It refers to physical phenomena arising from the force caused by magnets, objects that produce fields that attract or repel other objects. Magnetism is ... Read More

Multiple alleles

06/05/2021 0

Multiple alleles Multiple alleles are two or more alternative forms of a gene controlling a particular characteristic, of which any two may occupy the same ... Read More

Sex limited characters

06/05/2021 0

Sex limited characters These are characters that that show up exclusively in one sex only e.g. ovary in female alternatively testes are found in male ... Read More

Sex linkage

06/05/2021 1

Sex linkage Sex linked characters are those whose genes that are carried on sex chromosomes usually X-chromosomes and is inherited along with sex e.g. colorblindness, ... Read More

Back cross

06/05/2021 0

Back cross This is a cross between hybrids in F1 generation with one of the parents or an organism genetically equivalent to the parents. Back ... Read More

Test crosses in genetics

06/05/2021 0

Test crosses in genetics This is the crossing of an individual having homozygous recessive genotype with an individual showing a dormant trait to determine whether ... Read More

Mendel’s laws of inheritance

06/05/2021 0

Mendel's laws of inheritance Mendel’s first law of segregation states that an organism’s characteristics are controlled by two genes (alleles) and only one can be ... Read More

Phenotype

06/05/2021 0

Phenotype This is the physical characteristic of an organism determined by the genotype and the environment. Please Subscribe to promote this website. Subscription is free ... Read More

Genotype

06/05/2021 0

Genotype This is the genetical constitution of an organism i.e. the particular set alleles, leading to observable characteristics Please Subscribe to promote this website. Subscription ... Read More

Alleles (Allelomorphs)

06/05/2021 0

Alleles (Allelomorphs) This is one of the pair of a gene that occupy the same locus (position). Alleles are genes that are responsible for the ... Read More

What is a gene?

06/05/2021 0

A gene This is the basic unit of hereditary and occupies a discrete position on the chromosomes. The gene controls the production of enzyme which ... Read More

Adaptation of animals to low oxygen tension

06/05/2021 0

Adaptation of animals to low oxygen tension High haemoglobin concentration in blood Have myoglobin that store oxygen Fish e.g. trout store oxygen in swimming bladder ... Read More

Adaptations of the alveolus to efficient gaseous exchange

06/05/2021 0

Adaptations of the alveolus to efficient gaseous exchange They are very numerous that they offer a big surface area for gaseous exchange Alveolar epithelium is ... Read More

Structure of alveolus

06/05/2021 0

Structure of alveolus Please Subscribe to promote this website. Subscription is free Share with a friend Your comments are highly welcome Thank you so much Read More

Adaptations of fish gill to gaseous exchange

06/05/2021 0

Adaptations of fish gill to gaseous exchange Gills are red- rich blood supply many tiny gill filaments increase surface area for gaseous exchange Gill lamellae ... Read More

Adaptations of insects to effective gaseous exchange

06/05/2021 0

Adaptations of insects to effective gaseous exchange It has got tracheal system that ramify the whole body delivering oxygen to each cells. The extent of ... Read More

Specialized gaseous exchange surfaces

06/05/2021 0

Specialized gaseous exchange surfaces The specialised gaseous exchange surfaces provide large surface area by developing flaps, sac or tubes.   Examples Body surface is usually sufficient ... Read More

Processes of urine production

06/05/2021 0

Processes of urine production Filtration: This occurs in glomerulus into the Bowman’s capsule. The filtration pressure is due to the fact that afferent blood vessel ... Read More

Parts of a nephron

06/05/2021 0

Parts of a nephron  Please Subscribe to promote this website. Subscription is free Share with a friend Your comments are highly welcome Thank you so ... Read More

Parts of the kidney

06/05/2021 0

Please Subscribe to promote this website. Subscription is free Share with a friend Your comments are highly welcome Thank you so much Read More

Urinary system

06/05/2021 0

Please Subscribe to promote this website. Subscription is free Share with a friend Your comments are highly welcome Thank you so much Read More

Excretory organs and their excretory product

06/05/2021 0

Excretory organs and their excretory product Excretory  organ Products of excretion Lungs Carbon dioxide Skin Urea, ammonia Kidney Urea ammonia and uric acid Please Subscribe ... Read More

The principle endocrine glands of mammal, hormones and functions of the hormones

06/05/2021 0

The principle endocrine glands of mammal, hormones and functions of the hormones Gland Hormone main function a. Thyroid Thyroxine Raise basal metabolic rate Calcitonin Opposes ... Read More

Sensory neuron

06/05/2021 0

Sensory neuron transmits impulses from the receptor to the brain   Please Subscribe to promote this website. Subscription is free Share with a friend Your ... Read More

Motor neuron

06/05/2021 0

Motor neuron transmits impulses from the brain to effect Please Subscribe to promote this website. Subscription is free Share with a friend Your comments are ... Read More

Difference between nervous and endocrine system

06/05/2021 0

Difference between nervous and endocrine system   Nervous system Endocrine system   1. Fast acting slow acting 2. It’s effects are localized It’s effects are ... Read More

Fat soluble vitamins

06/05/2021 0

Fat soluble vitamins are  ADEK   Please Subscribe to promote this website. Subscription is free Share with a friend Your comments are highly welcome Thank ... Read More

Vitamins and their deficient diseases

06/05/2021 0

Vitamins and their deficient diseases Vitamin   A Night blindness K Delayed clotting E Reduced fertility in rats Vitamin C scurvy Please Subscribe to promote ... Read More

Testing for Vitamin C

06/05/2021 0

Testing for Vitamin C It decolorizes DCPIP. Please Subscribe to promote this website. Subscription is free Share with a friend Your comments are highly welcome ... Read More

Functions of vitamins

06/05/2021 0

Functions of vitamins protect the body against diseases formation of coenzyme that facilitate enzyme reactions blood clotting components of visual pigment Please Subscribe to promote ... Read More

Testing for proteins

06/05/2021 0

\ Testing for proteins They coagulate on heating They coagulate on addition of Melon’s reagent and on heating they form a pink precipitate. They form ... Read More