Question 1 Which of the following consists entirely vector quantities? {UTME 2001} A. Work, pressure and moment B. Velocity, magnetic flux and reaction. C. Displacement, impulse and power. D. Tension, magnetic flux and mass. Solution Vector quantities has both magnitude and direction Option A – pressure and work are scalar …

Read More »## How to solve Questions on Nuclear physics for UTME

Question 1 A piece of radioactive material contains 1000 atoms. If its half-life is 20 seconds, the time taken for 125 atoms to remain is {UTME 2012} A. 20 seconds B. 40 seconds C. 60 seconds D. 80 seconds Solution N = N0 exp(-ℷt) ℷ = 0.693/T ℷ = 0.693/20 …

Read More »## How to solve questions on gas law for UTME

Question 1 The pressure of a given mass of a gas changes from 300Nm-2 to 120Nm-2 while the temperature drops from 127oC to –73oC. The ratio of the final volume to the initial volume is{UTME 2001} A. 2 : 5 B. 4 : 5 C. 5 : 2 D. …

Read More »## Short notes on gas law for UTME

Boyle’s law Boyle’s law states that the volume of a fixed mass of gas is inversely proportional to the pressure provided that the temperature remains constant. If p is the pressure, v the volume and t the temperature in the Kelvin, Then the law can be stated as follows: P …

Read More »## How to solve questions on current of electricity for UTME

Question 1 A working electric motor takes a current of 1.5A when the p.d. across it is 250V. If its efficiency is 80%, the power output is{UTME 2001} A. 469.0W B. 300.0W C. 4.8W D. 133.0W Solution Efficiency = (power output / power input)% power input = IV = 1.5*250 …

Read More »## How to solve questions on alternating current circuit for UTME

Question 1 The current output form of an a.c. source is given as I = 10 sin w t. The d.c. equivalent of the current is {UTME 2012} A. 5.0A B. 7.1A C. 10.0A D. 14.1A Solution I = I0 sin wt Comparing this with the equation in the question …

Read More »## Questions and answers on Magnetic field and E.M induction for UTME

Question 1 Induced emfs are best explained using{UTME 2013} A. Lenz’s law B. Ohm’s law C. Faraday’s law D. Coulomb’s law Solution Athough both Faraday and Lenz explained the induced emf Faraday’s law talk about the emf is induced as a result of the rate of change of magnetic flux …

Read More »## Notes on application Physics for Cambridge A level students

ELECTRONIC SENSOR SENSING UNIT : This produce input voltage to processor depending on change in physical properties e.g temperatue, light or pressure. Piezo electric Transducer It converts energy from one form to another e.g microphone Quartz, a crystal has its positive and negative ion joined at the centre When pressure …

Read More »## Solutions to Cambridge A level June 2015 and 2016 physics

Question 1 The average kinetic energy E of a gas molecule is given by the equation E = 3/2 kT where T is the absolute (kelvin) temperature. What are the SI base units of k ? A kg–1m–1s2K B kg–1m–2s2K C kg m s–2K–1 D kg m2s–2K–1 Solution The S.I …

Read More »## How to solve questions on linear expansivity

Linear expansivity is defined as the increase in length, of the unit length of the material for one degree temperature rise. In order to solve any question on linear expansity: (i) Write down the formula (ii) Write down the data given (iii) Understand what you are asked to find (iv) …

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