The half life of a radioactive substance is 14 days. If 48g of this substance is stored, after how many days will 1.5g of the original substance remain?
A. 84 days B. 70 days C. 56 days D. 40 days Correct Answer: Option B B. 70 daysBorh’s theory provides evidence for the?
A. structure of the atom B. positive charge of an electron C. existence of energy level in the atom D. positive charge on a proton Correct Answer: Option C C. existence of energy level in the atomCalculate the inductance of an inductor whose reactance is one ohm at 50 Hz.
A. 2.00 x 10‾²H B. 6.36 x 10‾²H C. 3.18 x 10‾²H D. 4.55 x 10‾²H Correct Answer: Option C C. 3.18 x 10‾²HAn inductor of inductance 10H carries a current of 0.2A. Calculate the energy stored in the inductor?
A. 0.1J B. 0.2J C. 1.0J D. 2.0J Correct Answer: Option B B. 0.2JA device used to prevent wearing away of the make and-brake contacts of an induction coil is called a\an?
A. fuse B. electroscope C. resistor D. capacitor Correct Answer: Option D D. capacitorProducts
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