An iron rod is moved from the earth to the moon. Which of the following properties of the rod would remain unchanged?
i. mass ii. weight iii. relative density A. i only B. ii only C. iii only D. i and iii only Correct Answer: Option D D. i and iii onlyElectrons passing through crystals are diffracted because they?
A. are repelled by the atoms in the crystal B. are attracted by the atoms in the crystals C. possess wave properties D. are particles Correct Answer: Option C C. possess wave propertiesProduction of x-ray tube begins with?
A. photoelectric emission B. collision of electrons C. thermionic emission D. field emission of electrons Correct Answer: Option D D. field emission of electronsCalculate the reactance of the inductor in the circuit diagram shown above [π=22/7]
A. 132Ω B. 214Ω C. 264Ω D. 269Ω Correct Answer: Option C C. 264Ω Explanation XL=2πfL=2×π×60×0.7=264ΩIn the circuit diagram below. Calculate the energy stored in the inductor at resonance.
A. 0.100J B. 0.050J C. 0.010J D. 0.005J Correct Answer: Option B B. 0.050JProducts
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