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JEE Main

IMPORTANT

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The ratio of the equivalent resistance of the network (shown in figure) between the points $a$ and $b$ when switch is open and switch is closed is $x : 8$ . The value of $x$ is

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Important Questions on Current Electricity

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 14 - Current Electricity>JEE Main - 31 August 2021 Shift 1>Q 11

The voltage drop across

15 Ω

resistance in the given figure will be _______

V .

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JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 14 - Current Electricity>JEE Main - 31 August 2021 Shift 1>Q 12

A square-shaped wire with a resistance of each side

3 Ω

is bent to form a complete circle. The resistance between two diametrically opposite points of the circle in a unit of

Ω

will is, _____.

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 14 - Current Electricity>JEE Main - 31 August 2021 Shift 2>Q 13

The equivalent resistance of the given circuit between the terminals

A

and

B

is :

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 14 - Current Electricity>JEE Main - 31 August 2021 Shift 2>Q 14

A resistor dissipates $192 J$ of energy in $1 s$ when a current of $4 A$ is passed through it. Now, when the current is doubled, the amount of thermal energy dissipated in $5 s$ is _____________ $J .$

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 14 - Current Electricity>JEE Main - 1 September 2021 Shift 2>Q 15

Two resistors

R_{1} = (4 \pm 0.8) Ω

and

R_{2} = (4 \pm 0.4) Ω

are connected in parallel. The equivalent resistance of their parallel combination will be :

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 14 - Current Electricity>JEE Main - 1 September 2021 Shift 2>Q 16

A uniform heating wire of resistance

36 Ω

is connected across a potential difference of

240 V .

The wire is then cut into half and a potential difference of

240 V

is applied across each half separately. The ratio of power dissipation in first case to the total power dissipation in the second case would be

1 : x,

where

x

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 14 - Current Electricity>JEE Main - 20 July 2021 Shift 1>Q 17

Question Image

The value of current in the $6 Ω$ resistance is:

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 14 - Current Electricity>JEE Main - 20 July 2021 Shift 1>Q 18

A current of

5 A

is passing through a non-linear magnesium wire of cross-section

0.04 m^{2}

. At every point the direction of current density is at an angle of

60 °

with the unit vector of area of cross-section.
The magnitude of electric field at every point of the conductor is: (resistivity of magnesium

ρ = 44 \times 10^{- 8} Ωm

)

The ratio of the equivalent resistance of the network (shown in figure) between the points a and b when switch is open and switch is closed is x: 8. The value of x is

Important Questions on Current Electricity

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The ratio of the equivalent resistance of the network (shown in figure) between the points $a$ and $b$ when switch is open and switch is closed is $x : 8$ . The value of $x$ is