1
CBSE 12th Physics (Term 1) Paper 2021-22
MCQ (Single Correct Answer)
+0.77
-0
A car battery is charged by a 12 V supply, and energy stored in it is 7.20 $$\times$$ 105 J. The charge passed through the battery is -
A
6.0 $$\times$$ 104 C
B
5.8 $$\times$$ 103 J
C
8.64 $$\times$$ 106 J
D
1.6 $$\times$$ 105 C
2
CBSE 12th Physics (Term 1) Paper 2021-22
MCQ (Single Correct Answer)
+0.77
-0
If n, e, $$\tau$$ and m have their usual meanings, then the resistance of a wire of length l and cross-sectional area A is given by -
A
$${{n{e^2}A} \over {2m\tau l}}$$
B
$${{ml} \over {n{e^2}\tau A}}$$
C
$${{m\tau A} \over {n{e^2}l}}$$
D
$${{n{e^2}\tau A} \over {2ml}}$$
3
CBSE 12th Physics (Term 1) Paper 2021-22
MCQ (Single Correct Answer)
+0.77
-0
Two sources of equal emf are connected in series. This combination is, in turn connected to an external resistance R. The internal resistance of two sources are r1 and r2 (r2 > r1). If the potential difference across the source of internal resistance r2 is zero, then R equals to -
A
$${{{r_1} + {r_2}} \over {{r_2} - {r_1}}}$$
B
$${r_2} - {r_1}$$
C
$${{{r_1}{r_2}} \over {{r_2} - {r_1}}}$$
D
$${{{r_1} + {r_2}} \over {{r_1}{r_2}}}$$
4
CBSE 12th Physics (Term 1) Paper 2021-22
MCQ (Single Correct Answer)
+0.77
-0
The equivalent resistance between A and B of the network shown in figure is

CBSE 12th Physics (Term 1) Paper 2021-22 Physics - Current Electricity Question 14 English
A
3R $$\Omega$$
B
$$\left( {{3 \over 2}} \right)$$R $$\Omega$$
C
2R $$\Omega$$
D
$$\left( {{2 \over 3}} \right)$$R $$\Omega$$
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