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

The percentage error in the measurement of g is : (Given that $$g = {{4{\pi ^2}L} \over {{T^2}}}$$, $$L = (10\, \pm \,0.1)$$ cm, $$T = (100\, \pm \,1)$$ s)

A
7%
B
2%
C
5%
D
3%
2
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1

Two very long, straight, parallel conductors A and B carry current of 5 A and 10 A respectively and are at a distance of 10 cm from each other. The direction of current in two conductors is same. The force acting per unit length between two conductors is : ($$\mu$$0 = 4$$\pi$$ $$\times$$ 10$$-$$7 SI unit)

A
1 $$\times$$ 10$$-$$4 Nm$$-$$1 and is repulsive
B
2 $$\times$$ 10$$-$$4 Nm$$-$$1 and is attractive
C
2 $$\times$$ 10$$-$$4 Nm$$-$$1 and is repulsive
D
1 $$\times$$ 10$$-$$4 Nm$$-$$1 and is attractive
3
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1

The magnetic field on the axis of a circular loop of radius 100 cm carrying current $$I = \sqrt 2 \,A$$, at point 1 m away from the centre of the loop is given by :

A
$$6.28 \times {10^{ - 4}}$$ T
B
$$3.14 \times {10^{ - 7}}$$ T
C
$$6.28 \times {10^{ - 7}}$$ T
D
$$3.14 \times {10^{ - 4}}$$ T
4
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus

At any instant, two elements X1 and X2 have same number of radioactive atoms. If the decay constant of X1 and X2 are 10 $$\lambda$$ and $$\lambda$$ respectively, then the time when the ratio of their atoms becomes $${1 \over e}$$ respectively will be :

A
$${1 \over {5\lambda }}$$
B
$${1 \over {11\lambda }}$$
C
$${1 \over {9\lambda }}$$
D
$${1 \over {6\lambda }}$$
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