CBSE 12th Physics (Term 1) Paper 2021-22 | Current Electricity Question 13 | Physics

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CBSE 12th Physics (Term 1) Paper 2021-22

MCQ (Single Correct Answer)

+0.77

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In a dc circuit the direction of current inside the battery and outside the battery respectively are -

positive to negative terminal and negative to positive terminal

positive to negative terminal and positive to negative terminal

negative to positive terminal and positive to negative terminal

negative to positive terminal and negative to positive terminal

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 -

6.0 $$\times$$ 10⁴ C

5.8 $$\times$$ 10³ J

8.64 $$\times$$ 10⁶ J

1.6 $$\times$$ 10⁵ C

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 -

$${{n{e^2}A} \over {2m\tau l}}$$

$${{ml} \over {n{e^2}\tau A}}$$

$${{m\tau A} \over {n{e^2}l}}$$

$${{n{e^2}\tau A} \over {2ml}}$$

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 -

$${{{r_1} + {r_2}} \over {{r_2} - {r_1}}}$$

$${r_2} - {r_1}$$

$${{{r_1}{r_2}} \over {{r_2} - {r_1}}}$$

$${{{r_1} + {r_2}} \over {{r_1}{r_2}}}$$

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Class 12 Subjects

Physics

Electromagnetism

Electrostatics Current Electricity Capacitor Magnetic Effect of Current Magnetic Properties of Matter Electromagnetic Induction Alternating Current Electromagnetic Waves

Optics

Geometrical Optics Wave Optics

Modern Physics