An object is placed at the Centre of curvature of a concave mirror. The image produced by the mirror is located:
Out beyond the centre of curvature
At the centre of curvature
Between the centre of curvature and the focal point
At the focal point
Eight bits combine to form:
A byte
Megabyte
Kilobyte
Gigabyte
The instrument which is used to display the magnitude of changing electric current is called:
Evacuated tube
Cathode rays oscilloscope
Television tube
Picture tube
the unit of frequency is:
hertz
vibration per second
cycle per second
all a, b and c