1
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1

If $$\overrightarrow F = 2\widehat i + \widehat j - \widehat k$$ and $$\overrightarrow r = 3\widehat i + 2\widehat j - 2\widehat k$$, then the scalar and vector products of $$\overrightarrow F $$ and $$\overrightarrow r $$ have the magnitudes respectively as

A
10, 2
B
5, $$\sqrt 3 $$
C
4, $$\sqrt 5 $$
D
10, $$\sqrt 2 $$
2
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus

Given below are two statements

Statement I : The law of radioactive decay states that the number of nuclei undergoing the decay per unit time is inversely proportional to the total number of nuclei in the sample.

Statement II : The half of a radionuclide is the sum of the life time of all nuclei, divided by the initial concentration of the nuclei at time t = 0.

In the light of the above statements, choose the most appropriate answer from the options given below :

A
Statement I is incorrect but statement II is correct
B
Both statement I and statement II are correct
C
Both statement I and statement II are incorrect
D
Statement I is correct but statement II is incorrect
3
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1

The physical quantity that has the same dimensional formula as pressure is

A
Coefficient of viscosity
B
Force
C
Momentum
D
Young's modulus of elasticity
4
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1

The effective capacitances of two capacitors are 3 $$\mu$$F and 16 $$\mu$$F, when they are connected in series and parallel respectively. The capacitance of two capacitors are :

A
1.2 $$\mu$$F, 1.8 $$\mu$$F
B
10 $$\mu$$F, 6 $$\mu$$F
C
8 $$\mu$$F, 8 $$\mu$$F
D
12 $$\mu$$F, 4 $$\mu$$F
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