Technical Based Test Test 1 Nddc Scholarship
Question 11
Which of the following element is covalently bonded?
Correct answer: (c) silicon
Silicon atoms are covalently bonded in a giant crystal lattice structure.
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Question 12
6.4 × 10–19 joule is approximately
Correct answer: (a) 4 electron volt
Since 1 eV ≈ 1.6×10−19 J,
\[\dfrac{6.4 \times 10^{-19}}{1.6 \times 10^{-19}} = 4 \ \text{eV}.\]
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Question 13
One Debye unit is approximately
Correct answer: (d) 3.5 × 10–30 C⋅m.
\[ \text{1 Debye} \approx 3.5 \times 10^{-30} \ \text{C·m}\]
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Question 14
At 0 K, germanium is a
Correct answer: (b) insulator
At 0 K, germanium has no free charge carriers, so it behaves as an insulator.
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Question 15
A body executing S.H.M. will have
Correct answer: (a) maximum velocity when its displacement is zero
In SHM, velocity is greatest at the equilibrium position where displacement is zero.
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Question 16
All motion is relative
Correct answer: (a) yes
Motion can only be described with respect to a chosen reference frame, so all motion is relative.
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Question 17
Maxwell’s equation do not obey the Galilean relativity
Correct answer: (a) true
Maxwell’s equations are consistent with special relativity but not with Galilean relativity, which assumes absolute time and space.
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Question 18
The speed of light is the same for any observer regardless of his state of motion
Correct answer: (a) true
According to Einstein’s special relativity, the speed of light in a vacuum is constant for all observers, regardless of their motion.
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Question 19
If m0 denotes the rest mass of the body and m indicates the mass of the body when it is moving with a velocity v, then
Correct answer: (d)
$$m = \dfrac{m_0}{\sqrt{1 - \dfrac{v^2}{c^2}}}$$
This is the relativistic mass formula, where m0 is the rest mass, v is velocity, and c is the speed of light.
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Question 20
Time is relative
Correct answer: (a) true
In relativity, time depends on the observer’s frame of reference — moving clocks tick slower compared to stationary ones.
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The following text is adapted from Indian Boyhood, a 1902 memoir by Ohiyesa (Charles A. Eastman), a Santee Dakota writer. In the text, Ohiyesa recalls how the women in his tribe harvested maple syrup during his childhood.
Now the women began to test the trees—moving leisurely among them, axe in hand, and striking a single quick blow, to see if the sap would appear. The trees, like people, have their individual characters; some were ready to yield up their life-blood, while others were more reluctant. Now one of the birchen basins was set under each tree, and a hardwood chip driven deep into the cut which the axe had made. From the corners of this chip—at first drop by drop, then more freely—the sap trickled into the little dishes.
Which choice best describes the function of the underlined sentence in the text as a whole?
Each of the questions below consists of two words that have a certain relationship to each other.
Select the pair of words.
ALCOVE : RECESS
Under the 1999 Constitution, the appointment of Ministers and Ambassadors must be ratified by the ........
Choose the option opposite in meaning to the underlined word(s).
The principal was filled with scorn when we gave our reason for coming late.
