Who invented electromagnetic theory?
(A) Thomas Alva addition
(B) J. J. Thomson
(C) Michael Faraday
(D) None of these
Principle of fuse is –
(A) Heating effect of electricity
(B) Magnetic effect of electricity
(C) Chemical effect of electricity
(D) Mechanical effect of electricity
Which one of the following SI unit is not correctly matched?
(A) Mass-Kg
(B) Pressure–Dyne
(C) Work-Joule
(D) Force-Newton
Transformer is used for -
(A) To step up DC voltage
(B) To step up or step-down AC voltages
(C) Converting AC into Dc
(D) Converting DC into AC
Gamma rays can cause
(A) burning
(B) fever
(C) gene mutation
(D) sneezing
The process of transferring of charge from a charged object to the earth is called ______________.
(A) Neutralization
(B) Negation
(C) Earthing
(D) Terraforming
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