NDA Government Jobs Exams

The earth's magnetic field is approximately -
(A) 1 Tesla (B) 2 Gauss
(C) 104 Tesla (D) 1 Gauss

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NDA Other Question

In India, distribution of electricity for domestic purpose is done in the of
(A) 220 V ; 50 Hz (B) 110 V ; 60 Hz
(C) 220 V ; 60 Hz (D) 110 V ; 50 Hz Yellow colour light is used as fog because yellow colour
(A) light is most scattered by fog
(B) has the longest wavelength among all colours
(C) has the longest wavelength among all colours except red and orange but the red colour is already used for
brake light and stop light where as organe colour is avoided due to its similarly with red
(D) has the shortest wavelength among all colours not already reserved for other purpose