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Select Lessons (39)
Dynamics: Newton’s Laws of Motion
ELECTRICITY: Current
ELECTRICITY: Current
ELECTRICITY: Resistance
Elasticity
Electric fields
Electromagnetism
Electromagnetism
Energy: Application And Uses
Experimental physics
Forces
Gravitational fields
Heat
Kinematics in Two Dimensions: Vectors, projectiles
Kinematics in one dimension
Linear Momentum
MOTION
MOTION
MOTION
MOTION
MOTION
MOTION: Circular
MOTION: Collision
MOTION: Inclined plane
MOTION: Simple harmonic motion (SHM)
Magnetism
Optics
PLASTICS
PRESSURE
Radioactivity
TEMPERATURE
The Laws of Thermodynamics
Units System
Units System
Units, dimensions and homogeneity
WAVES: Electromagnetic
WAVES: Electromagnetic
WAVES: Sound
5/12 MCQs for:
Experimental physics
What is the percent uncertainty in the measurement 2.58 ± 0.15 cm?
12%.
5.8%.
8.7%.
2.9%.
This gauge is most probably used to measure:
Voltage.
Current.
Amplitude.
Speed.
Which is the smallest division on a rule?
1mm.
10dm.
1cm.
1m.
Which of the following experimental techniques reduces the systematic error of the quantity being investigated?
Measuring the diameter of a wire repeatedly and calculating the average.
Plotting a series of voltages and current readings for an ohmic device on a graph and using its gradient to find resistance.
Adjusting an ammeter to remove its zero error before measuring a current.
Timing a large number of oscillations to find a period.
Vernier calipers, reading to 0.1 mm, are used to find the internal diameter (10.0 ± 0.1 mm) and the external diameter (12.0 ± 0.1 mm) of a length of glass tubing. The mean wall thickness would be quoted, therefore, as
2.0 ± 0.0 mm.
2.0 ± 0.1 mm.
1.0 ± 0.2 mm.
1.0 ± 0.1 mm.
