EASY

Earn 100

The effective resistance between $A$ and $B$ in the given circuit is

50% studentsanswered this correctly

Important Questions on Current Electricity

EASY

Physics>Electricity and Magnetism>Current Electricity>Combinations of Resistors

P and R

are two points on a uniform ring of resistance

R

O

is the centre of the ring. If

POQ = π rad

, the equivalent resistance of the ring between the point

P and Q

will be_____.

EASY

Physics>Electricity and Magnetism>Current Electricity>Combinations of Resistors

A uniform wire of resistance

R

is cut into

n

equal parts. These parts are then connected in parallel with each, other. The equivalent resistance of combination is,

EASY

Physics>Electricity and Magnetism>Current Electricity>Combinations of Resistors

Two resistors of equal value are connected in series and the total resistance is

R_{series}

.When the same two resistors are connected in parallel then the total resistance is

R_{parallel .}

The ratio between

R_{series}

R_{parallel}

EASY

Physics>Electricity and Magnetism>Current Electricity>Combinations of Resistors

Consider three resistors of resistances

R_{1}, R_{2} a n d R_{3}

such that

R_{1} < R_{2} < R_{3}

. Two of them are connected in parallel, and then connected in series with the third. Which one of the following configurations yields the highest current when connected to the same battery?

EASY

Physics>Electricity and Magnetism>Current Electricity>Combinations of Resistors

The current in the $1 Ω$ resistor shown in the circuit is,

Question Image

EASY

Physics>Electricity and Magnetism>Current Electricity>Combinations of Resistors

Seven resistances, each of value given R value are connected between two points A and B as shown in the figure.
Question Image

The combined value of resistance between points A and B.

EASY

Physics>Electricity and Magnetism>Current Electricity>Combinations of Resistors

If a uniform wire of resistance

16 Ω

is cut into four equal parts and attached in parallel combination, the equivalent resistance is

HARD

Physics>Electricity and Magnetism>Current Electricity>Combinations of Resistors

9 V

battery with an internal resistance of

0.5 Ω

is connected across an infinite network, as shown in the figure. All ammeters

A_{1}, A_{2}, A_{3}

and voltmeter

V

are ideal.
Choose the correct statement.

EASY

Physics>Electricity and Magnetism>Current Electricity>Combinations of Resistors

Five equal resistances are connected in a network as shown in figure. The net resistance between the points $A$ and $B$ is :

Question Image

EASY

Physics>Electricity and Magnetism>Current Electricity>Combinations of Resistors

The four arms of a Wheatstone bridge have resistances as shown in the figure. A galvanometer of $15 Ω$ resistance is connected across BD. Calculate the current through the galvanometer when a potential difference of $10 V$ is maintained across AC.

Question Image

EASY

Physics>Electricity and Magnetism>Current Electricity>Combinations of Resistors

A set of

n

equal resistances, of value

R

each, are connected in series to a battery of emf

E

and internal resistances

R

. The current drawn is

I

. Now, the

n

resistance are connected in parallel to the same battery. Then the current drawn from battery becomes

10 I

. The value of

n

EASY

Physics>Electricity and Magnetism>Current Electricity>Combinations of Resistors

Six similar bulbs are connected as shown in the figure with a DC source of emf $E$ , and zero internal resistance.
The ratio of power consumption by the bulbs when $(i)$ all are glowing and $(ii)$ in the situation when two from section $A$ and one from section $B$ are glowing will be,
Question Image

EASY

Physics>Electricity and Magnetism>Current Electricity>Combinations of Resistors

Resistances

1 Ω, 2 Ω

and

3 Ω

are connected to form a triangle. If a

1.5 V

cell of negligible internal resistance is connected across the

3 Ω

resistor, the current flowing through this resistor will be

EASY

Physics>Electricity and Magnetism>Current Electricity>Combinations of Resistors

Two bulbs of

220 V

and

100 W

are first connected in parallel and then in series with a supply of

220 V

. Total power in both the cases will be ______ respectively.

EASY

Physics>Electricity and Magnetism>Current Electricity>Combinations of Resistors

In the given circuit all resistance is of the value of

R

ohm each. The equivalent resistance between

A

and

B

is:

MEDIUM

Physics>Electricity and Magnetism>Current Electricity>Combinations of Resistors

Equivalent resistance between points

A

and

B

in the adjacent circuit is

Question Image

HARD

Physics>Electricity and Magnetism>Current Electricity>Combinations of Resistors

The figure shows three circuits

I, I I

and

I I I

which are connected to a

3 V

battery. If the powers dissipated by the configurations

I, I I

and

I I I

are

P_{1}, P_{2}

and

P_{3}

respectively, then -

Question Image

EASY

Physics>Electricity and Magnetism>Current Electricity>Combinations of Resistors

You are given

10

resistors each of resistance

2 Ω .

First they are connected to obtain possible minimum resistance. Then they are connected to obtain possible maximum resistance. The ratio of maximum and minimum resistance is ______

EASY

Physics>Electricity and Magnetism>Current Electricity>Combinations of Resistors

A wire of resistance

R

is bent to form a square

A B C D

as shown in the figure. The effective resistance between

E

and

C

is:
(

E

is mid-point of arm

C D

)

EASY

Physics>Electricity and Magnetism>Current Electricity>Combinations of Resistors

A uniform metallic wire has a resistance of

18 Ω

and is bent into an equilateral triangle. Then, the resistance between any two vertices of the triangle is:

The effective resistance between Aand B in the given circuit is

Important Questions on Current Electricity

Learn and Prepare for any exam you want !

The effective resistance between $A$ and $B$ in the given circuit is