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# Physic for A level & UTME

Simplifying physics for better understanding for students to excel in ‘A level’ and UTME

## How to solve questions on Nuclear Physics for Cambridge A level

Question 1 The gold nucleus 185Au79 undergoes alpha decay. What are the nucleon number and proton number of the nucleus formed by this decay?{cambridge A level may/june 2016 p12} Solution Au undergoes alpha decay 185Au79 – 181X77 + 4He2 The above equation is conserved since the number of nucleon and …

## Notes on nuclear physics for Cambridge A level and UTME

Rutherford alpha particle scattering experiment: Experimental evidence for nuclear atom:Results of an experiment where a beam of alpha particles is fired at a thin gold foil (about 1µm thick): where n= number of alpha particles incident per unit time. Alpha particle are helium atom particles. He bombarded positive alpha particle …

## How to solve questions on Direct current(D.C) for UTME and Cambridge A level

Question 1 An electric generator has an e.m.f. of 240V and an internal resistance of 1Ω. If the current supplied by the generator is 20A when the terminal voltage is 220V, find the ratio of the power supplied to the power dissipated.{UTME 2008} A. 11 : 1                         B. 1 : …

## Notes on doppler effect for students

Doppler effect is the apparent change in frequency when there is a relative motion between the source and the observe.   As the source approaches As the source moves away or recedes V is the speed of sound Vs is the sped of the source Fs is the frequency of …

## Notes on Direct Current for Cambridge A level and UTME

Direct current : flow of charges in the circuit is in the same direction all the time from higher potential to lower potential. Appropriate circuit symbol switch 2. Cell, voltmeter, ammeter, resistor, variable resistor etc Circuit diagram Kirchhoff’s First Law: The sum of the currents entering a junction is always …

## How to solve questions on Work, Energy and Power

Question 1 A hammer with 10 J of kinetic energy hits a nail and pushes it 5.0 mm into a plank. Both the hammer and nail come to rest after the collision. What is the approximate average force that acts on the nail while it moves through 5.0 mm?{ Cambridge …

## Short note on work, energy and power for Students

Workdone by a force is defined as the product of the force and the distance moved in the direction of the force. W = F  x s F is the force s is the displacement in the direction of the force w is the workdone the unit of workdone is …

## How to solve to some UTME Physics past questions

All the questions below are UTME past questions Questions 1 – 5 are from 2013 UTME Question 1 The resultant of two forces is 50N. If the forces are perpendicular to each other and one of them makes an angle of 300 with the resultant, find its magnitude A. 25.0N                   …