1
NEET 2021
MCQ (Single Correct Answer)
+4
-1
Change Language
Match Column - I and Column - II and choose the correct match from the given choices.

Column - I Column - II
(A) Root mean square speed of gas molecules (P) $${1 \over 3}nm{\overline v ^2}$$
(B) Pressure exerted by ideal gas (Q) $$\sqrt {{{3RT} \over M}} $$
(C) Average kinetic energy of a molecule (R) $${5 \over 2}RT$$
(D) Total internal energy of 1 mole of a diatomic gas (S) $${3 \over 2}{k_B}T$$
A
(A) - (R), (B) - (Q), (C) - (P), (D) - (S)
B
(A) - (R), (B) - (P), (C) - (S), (D) - (Q)
C
(A) - (Q), (B) - (R), (C) - (S), (D) - (P)
D
(A) - (Q), (B) - (P), (C) - (S), (D) - (R)
2
NEET 2021
MCQ (Single Correct Answer)
+4
-1
Change Language
In the product

$$\overrightarrow F = q\left( {\overrightarrow v \times \overrightarrow B } \right)$$

$$ = q\overrightarrow v \times \left( {B\widehat i + B\widehat j + {B_0}\widehat k} \right)$$

For q = 1 and $$\overrightarrow v = 2\widehat i + 4\widehat j + 6\widehat k$$ and $$\overrightarrow F = 4\widehat i - 20\widehat j + 12\widehat k$$

What will be the complete expression for $$\overrightarrow B $$ ?
A
$$6\widehat i + 6\widehat j - 8\widehat k$$
B
$$ - 8\widehat i - 8\widehat j - 6\widehat k$$
C
$$ - 6\widehat i - 6\widehat j - 8\widehat k$$
D
$$8\widehat i + 8\widehat j - 6\widehat k$$
3
NEET 2021
MCQ (Single Correct Answer)
+4
-1
Change Language
From a circular ring of mass 'M' and radius 'R' an arc corresponding to a 90$$^\circ$$ sector is removed. The moment of inertia of the remaining part of the ring about an axis passing through the center of the ring and perpendicular to the plane of the ring is 'K' times 'MR2'. Then the value of 'K' is :
A
$${1 \over 8}$$
B
$${3 \over 4}$$
C
$${7 \over 8}$$
D
$${1 \over 4}$$
4
NEET 2021
MCQ (Single Correct Answer)
+4
-1
Change Language
Three resistors having resistances r1, r2 and r3 are connected as shown in the given circuit. The ratio $${{{i_3}} \over {{i_1}}}$$ of currents in terms of resistances used in the circuit is :

NEET 2021 Physics - Current Electricity Question 29 English
A
$${{{r_2}} \over {{r_1} + {r_3}}}$$
B
$${{{r_1}} \over {{r_2} + {r_3}}}$$
C
$${{{r_2}} \over {{r_2} + {r_3}}}$$
D
$${{{r_1}} \over {{r_1} + {r_2}}}$$
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