Physics quick practice

Question 1 of 10

A transistor can be used as

Question 2 of 10

At a junction, 3 A and 2 A flow in. The current flowing out is

Question 3 of 10

An oscillation with a period of 2 s has a frequency of ___ Hz.

Question 4 of 10

The reactance of a capacitor

Question 5 of 10

A sample contains 8000 radioactive nuclei. After 3 half-lives, the number remaining is ___.

Question 6 of 10

Photons of energy 5.2 eV fall on a metal of work function 3.2 eV. The maximum kinetic energy of the photoelectrons is ___ eV.

Question 7 of 10

Increasing the length of a pendulum

Question 8 of 10

Explain the terms elastic, plastic, ductile and brittle, giving an example of a material for each.

Question 9 of 10

A converging lens forms a real image of an object at twice its focal length. The image is

Question 10 of 10

Kirchhoff's second (voltage) law is based on the conservation of