Explain why a current carrying conductor placed in a magnetic field experience a force
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
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
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.
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
An aired cored inductor is connected in series with a switch and d.c. source. The switch is closed and left for some time. Explain why a spark is observed across the switch contacts when the switch is reopened.
An aired cored inductor is connected in series with a switch and d.c. source. The switch is closed and left for some time. Explain why ... Read More
Explain why an alternating current apparently flow through a capacitor whereas a direct current does not.
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
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
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
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?
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?
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.
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
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
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.
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?
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
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
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
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
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
A rectangular coil of N turns each of length, L, and breadth, b, is inclined at an angle θ to a uniform magnetic field of flux density B. Derive an expression for torque of the coil when a current I is passed through it.
A rectangular coil of N turns each of length, L, and breadth, b, is inclined at an angle θ to a uniform magnetic field of ... 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
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.
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
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
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
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
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
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
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
Magnetism It refers to physical phenomena arising from the force caused by magnets, objects that produce fields that attract or repel other objects. The scope ... Read More
Multiple alleles
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
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
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
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
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
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
Alleles (Allelomorphs)
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?
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
\ 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