Calculate the current (I) in the diagram shown below. (Neglect the internal resistance of the cell)
A. 4.0A B. 2.0A C. 1.0A D. O.5A E. 0.1A. Correct Answer: Option C – 1.0A Explanation R = 2 + 2 = 4 Ω; 1/R = ¼ + ¼ = 2/4; R = 2Ω ∴ I = V/R = 2/2 = 1A
When an atom is in the ground state, it is said to be?
A. grounded B. excited C. stable D. ionized E. radiating Correct Answer: Option C – stable
According to the kinetic theory of gases the collision of the molecules of a gas with the wall of the container is mainly responsible for the?
l. temperature of the gas ll. viscosity of the gas Ill. pressure of the gas A. I only B. II only C. III only D. II and III only E. I, II and III. Correct Answer: Option C – III only
Which of the following is used a nuclear reactor to slow down fast moving neutrons?
A. Carbondioxide gas B. Liquid sodium metal C. Concrete shield D. Graphite rods E. Boron rods Correct Answer: Option E – Boron rods
A radioactive substance has a half-life of 20 hours. What traction of the original radioactive nuclide will remain after 80 hours?
A. 1/32 B. 1/16 C. 1/8 D. ¼ E. 1/2 Correct Answer: Option B – 1/16Products
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