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The switch is open and capacitors are uncharged. At t =o the s

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The switch is open and capacitors are uncharged. At t =o the switch S is closed.Find the equivalent resistance of the circuit at t=o R=R,R=R/2,C=C,C=C/2

a)R
MM
b)R CR dR
eR

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The switch is open and capacitors are uncharged. At t =o the switch S is closed.Find the equivalent resistance of the circuit at t=o R=R,R=R/2,C=C,C=C/2

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Question 1

Easy

In order to determine the Young's Modulus of a wire of radius

0.2 cm

(measured using a scale of least count

= 1 mm

= 0.001 cm

) and length

1 m

(measured using a scale of least count

= 1 mm

), a weight of mass

1 kg

(measured using a scale of least count

= 1 g

) was hanged to get the elongation of

0.5 cm

(measured using a scale of least count

0.001 cm

). What will be the fractional error in the value of Young's Modulus determined by this experiment?

$0.14%$
$0.9%$
$1.4%$
$9%$

Topic:

Mechanical Properties of Solids

Exam:

JEE Mains 2021 Mar 16 Shift 2

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Question 2

Medium

A mass

m

rests under the action of a force

F

as shown in the figure on a horizontal surface. The coefficient of friction between the mass and the surface is

μ

. The force of friction between the mass and the surface is :

$μ m g$
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$\frac{F 3}{2}$
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Topic:

Laws of motion

Book:

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Question 3

Hard

Two point masses each of mass

m

collide perpendicularly to a uniform rod of mass

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and length

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at rest placed on smooth horizontal

x - y

plane as shown. If collision is perfectly elastic, then the speed
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$2 v_{0}$
$v_{0}$

Topic:

System of Particles and Rotational Motion

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Question 4

Hard

A student performs an experiment for the determination of

g = \frac{4 π ^{2} l}{T ^{2}}

and he commits an error of

Δ l

. For that, he takes the time of

n

oscillations with the stopwatch of least count

Δ T

and he commits a human error of

0.1 sec

. For which of the following data, the measurement of

g

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Topic:

Units and Measurements

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Question Text	The switch is open and capacitors are uncharged. At t =o the switch S is closed.Find the equivalent resistance of the circuit at t=o R=R,R=R/2,C=C,C=C/2
Topic	All topics
Subject	Physics
Class	Class 11

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