In variable capacitor, dielectric medium is:
Paper
Air
Mica
Ceramic
How Galvanometer is connected in circuit to detect current:
In series
In parallel
Fixed
Variable
study of charges at rest is called:
acoustics
electrostatics
electronics
electricity
If a ray of light in glass is incident on an air surface at an angle greater than the critical angle, the ray will:
Refract only
Reflect only
Partially refract and partially reflect
Diffract only
1 bel=
0.1 dB
10 dB
100 dB
0.01 dB
The way of doing business by using web is called:
Sources of entertainment
Web business
E-commerce
E-mail