For the following questions answer them individually
The spaceto heightratio in illumination lies between
Moulded casecircuit breaker is used for
Which of the following will need lowest level of illumination?
A mercury vapour lamp gives
Heat is transferred simultaneously by conduction, convection and radiation .........
Heavy-duty steel-works cranes having wide load variations are equipped with
In induction heating
The depth of penetration , in the case hardening of a steel pulley, required is 105mm. The relative permeability is unity and the specific resistance for steel is $$5 \times 10^{-7}$$ Ω-m. Determine the frequency required.
When an electron breaks a covalent bond, and moves away
A zener diodeis invariably used with