Units and Measurement questions
875 published questions with worked solutions.
- A physical quantity A is related to four observables a,b,c and d as follows: A= a^2b^3 d c . The percentage errors of measurement...
- The period of oscillation of a simple pendulum is T=2 L/g . The measured value of L is 20.0 ,cm, known to 1 ,mm accuracy. The...
- The density of the material of a cube is determined by measuring the three sides of the cube and its mass. If the relative errors...
- The specific resistance = r^2R l . Given: r=0.20 0.02 ,cm, R=25 1 , , and l=5.00 0.01 ,cm. The percentage error in is ________%.
- The moment of inertia of a body rotating about a given axis is 9 ,kg ,m^2 in the SI system. If the value of the moment of inertia...
- The length of a cylinder is measured with a metre rod having a least count of 0.1 ,cm. Its diameter is measured with vernier...
- In the CGS system, the magnitude of the force is 1000 dyne. In another system, where the fundamental quantities are kilogram,...
- Dimensional analysis of the equation ( velocity )^x=( pressure difference )^ 3/2 ( density )^ -3/2 gives the value of x as...
- If the new unit of force is 1 kilo-newton, length is 1 ,cm and time is 10 seconds, then the unit of mass in the new system will...
- Let _0 denote the dimensional formula of the permittivity of vacuum. If M= mass, L= length, T= time and A= electric current, then...
- If the fundamental units of two systems of measurement are in the ratio 1:2, then the ratio of units of angular momentum in the...
- When a current of (5 0.5) ,A flows through a wire, it develops a potential difference of (20 1) ,V. The resistance of the wire is...
- The energy of a system as a function of time t is given as E(t)=A^2 (- t), where =0.4 ,s^ -1 . The measurement of A has an error...
- Two resistors A and B have values (3.0 0.1) ,k and (9.0 0.3) ,k respectively. If they are connected in parallel, the percentage...
- Which one of the following is NOT a fundamental (base) quantity?
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