PHYSICS quiz
Here are sample questions from the PHYSICS category. Think about each answer before revealing it – and then check how you'd do against real players in the app.
Who built and described the first electric battery in 1800?
What is the highest value on the pH scale?
You can be off by 1.
14
In which century was superconductivity discovered?
You can be off by one century.
XX century
It was discovered in 1911 by Heike Kamerlingh Onnes.
Where was Isaac Newton born?
Newton was born in the hamlet of Woolsthorpe in Lincolnshire, three months after his father's death. He also spent 1665–1666 there, when the universities were closed because of the plague.
In which century did Wilhelm Röntgen discover X-rays?
You can be off by one century.
XIX century
He published his results on December 28, 1895. The name "X-rays" that he proposed is still in use today.
Is air a chemical compound?
- No
- Yes
No, it is not a chemical compound. Air is a mixture of the gases that make up the atmosphere.
What is the electrode through which electric current flows into a device, such as a vacuum tube, called?
In vacuum tubes the anode is the positive electrode. The name comes from the Greek "ana", up, and "hodos", way.
What does a pyrometer measure?
The measurement is made without contact.
Was the Italian-born American physicist Enrico Fermi a Nobel Prize winner?
- No
- Yes
What is the unit of reactive power?
The name is short for "volt-ampere reactive". The watt is the unit of real power, and the volt-ampere of apparent power.
Which physicist presented a disc with colored sectors in 1704 to demonstrate additive color mixing?
The right combination of colors on the spinning disc gives the impression of white.
What is the atomic number of hydrogen?
1
What is the unit of radioactivity, named after the discoverer of radioactivity?
Henri Becquerel shared the 1903 Nobel Prize with Pierre Curie and Marie Skłodowska-Curie for the discovery and study of radioactivity.
Which two physical quantities define the triple point of a substance?
At this point all three states of matter of the substance can coexist.
Does friction act in the direction of a body's motion or opposite to it?
Which letter denotes the mass number?
The mass number is the number of nucleons – protons and neutrons – in an atom's nucleus. The atomic number, the number of protons, is denoted by Z, and the number of neutrons by N.
What is the transition of a liquid into a gas at its surface called?
When the change occurs throughout the liquid, it is called boiling. The reverse process, gas turning into liquid, is condensation.
Is aluminum a dielectric?
- No
- Yes
No. Aluminum is a very good electrical conductor and is used, among other things, in high-voltage power lines.
Is the weight of a body a force?
- No
- Yes
Weight is another name for the force of gravity acting on a body.
What is the change in frequency of a wave recorded by an observer moving relative to its source called?
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