# Solved Problems in Basic Physics

## Measurement and significant figures – problems and solutions

1. The length of an object measured using a micrometer is 15.08 mm. Determine the significant figures and the number of significant figures. A. 15.08 mm and three significant figures B. 1.508 mm and four significant figures C. 15.08 mm and four significant figures D. 1.508 mm and three significant figures

## Quantities and units of physics – problems and solutions

1. The correct International Unit showed by student…

## Dimensional analysis – problems and solutions

1. Based on the dimensional analysis, determine the following physics dimensions that have the same dimensions. A. work and power B. power and pressure C. force and momentum D. work and heat

## LRC Series AC Circuit – problems and solutions

1. Determine the electric current in circuit (1 µF = 10-6 F)

## Magnetic field produced by two parallel current-carrying wires – problems and solutions

1. Two long parallel wires carrying the same currents 3-A. If the distance between both wires is 40 cm, determine magnetic field at point P. μo = 4π x 10−7 Wb A−1 m−1. Known : Electric current (I) = 3-A Distance between wire 1 and 2 (r12) = 40 cm = 0.4 m Distance between …

## Voltage and loops of transformers – problems and solution

1. Based on the above table, find R and P. Solution Transformer’s equation :

## Magnetic field at the center of an arc of current – problems and solutions

1. Based on the figure below, if the radius of the curvature of the wire is 50 cm, determine the magnitude of the magnetic field at the center of curvature (at point 0, see figure below). (µo = 4π.10-7 Wb.A-1 m-1) Known : Radius (r) = 50 cm = 0.5 m Electric current (I) = …

## Electromagnetic induction Induced EMF – Problems and Solutions

3 Electromagnetic induction Induced EMF – Problems and Solutions 1. A coil replaced with another coil that has loops 2 times the initial loops and the rate of change of magnetic flux is constant. Determine the ratio of initial and final induced emf. Known : Initial loops (N) = 1 Final loops (N) = 2 …

## Kirchhoff law – problems and solutions

1. If R1 = 2Ω, R2 = 4Ω, R3 = 6Ω, determine the electric current flows in the circuit below. Known : Resistor 1 (R1) = 2Ω Resistor 2 (R2) = 4Ω Resistor 3 (R3) = 6Ω Source of emf 1 (E1) = 9 V Source of emf 2 (E2) = 3 V

## The energy produced in the fusion reaction – problems and solutions

1. Based on the following equation of the fusion reaction, determine the energy produced in the fusion reaction! Solution