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Some Important Question of Science for NDA 2 2021
1.If a current passes through a resistor then find the relation between K1 and K2 where K1 and K2 represent the average kinetic energy of the conduction electrons and the metal ions, respectively.A. K2 < K2
B. K1 = K2
C. K1 > K2
D. Any of these three may occur
2.If a uniform wire of resistance 50 Ω is cut into 5 equal parts and these parts are connected in parallel then calculate the equivalent resistance of the combination.A. 2 Ω
B. 10 Ω
C. 250 Ω
D. 6250 Ω
3.Consider the following statements when two non-ideal batteries are connected in series.
(i) The equivalent emf is larger than either of the two EMFs.
(ii) The equivalent internal resistance is smaller than either of the two internal resistances.A. (i) and (ii) are correct.
B. (i) is correct but (ii) is wrong.
C. (ii) is correct but (i) is wrong.
D. (i) and (ii) are wrong.
4.How much current drawn from the alternating current shown in the figure, if the currents through inductor and capacitor are 1.2 amp and 1.0 amp respectively.
A. 0.4 amp
B. 0.2 amp
C. 1.0 amp
D. 1.2 amp
5.What is the direction of current in coil A, when the current in coil B (at t=0) is in a counterclockwise as shown in the figure? [ Coil A is rotated about its vertical axis because no current is induced in coil B if coil A is at rest]
A. Constant current clockwise.
B. Varying current clockwise.
C. Varying current counterclockwise.
D. Constant current counterclockwise
6.How many oxygen ions are there in 3 moles of oxygen?A.
7.A compound can release 20% of oxygen by mass on heating. How much compound is needed if 800 g of oxygen is to be released?A. 4 kg
B. 5 kg
C. 2 kg
D. 2.5 kg
8.Which of the following has the same number of electrons as 16S32?A. 17Cl35-
9.What is the chemical symbol for Tantalum?A. Ta
10.An element has 9 electrons, 9 protons, and 10 neutrons. What is its mass number?A. 18
11.Which of the following are classified as prokaryotes?A. Bacteria and Archaea
B. Bacteria and Protista
C. Archaea and Eukarya
D. Eukarya and Monera
12.__________ disease is caused by the deficiency of Niacin.A. Scurvy
D. Pernicious anemia
13.Which type of bond is present in protein?A. Glycosidic
14.Which of the following is the function/ functions of the prostate gland?A. To transfer sperms smoothly
B. To keep sperms alive
C. To help sperm swim vigorously
D. Both B & C
15.Classification of organisms as oxygenic or anoxygenic during photosynthesis is based on ______A. The presence of Co2
B. The generation of oxygen
C. The presence of light
D. The presence of water
Solution is provided in the PDF above
All The Best