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PHXII03:CURRENT ELECTRICITY

356967 The effective resistance of a parallel connection that consists of four wires of equal length, equal area of cross-section and same material is $0.25 Ω .$ What will be the effective resistance if they are connected inseries?

1

0.5 Ω

2

1 Ω

3

4 Ω

4

0.25 Ω

Explanation:

For parallel connection $R_{P} = \frac{R}{n} = 0.25 Ω$
$\Rightarrow R = 1 Ω (n = 4)$
For series connection
$R_{s} = n R = 4 \times 1 = 4 Ω$

NEET - 2021

PHXII03:CURRENT ELECTRICITY

356968 The equivalent resistance between points $A$ and $B$ is
supporting img

1

2 R

2

(3 / 4) R

3

(4 / 3) R

4

(3 / 5) R

PHXII03:CURRENT ELECTRICITY

356969 Assertion :
In the following circuit the net resistance between points $A$ and $B$ is $r$ .
Reason :
All the resistance are in parallel to each other.
supporting img

1 Both assertion and reason are correct and reason is the correct explanation of assertion.

2 Both assertion and reason are correct but reason is not the correct explanation of assertion.

3 Assertion is correct but reason is incorrect.

4 Assertion is incorrect but reason is correct.

Explanation:

Let $C$ and $D$ be two points on the circuit
supporting img
The circuit can be redrawn as

It is a wheatstone bridge $r_{e q} = r$
All the resistors are not in parallel. So option (3) is correct.

PHXII03:CURRENT ELECTRICITY

356970 Five resistances are connected as shown in the figure. The effective resistance between points $A$ and $B$ is
supporting img

1

\frac{10}{3} Ω

2

\frac{10}{17} Ω

3

40 Ω

4

45 Ω

Explanation:

supporting img

The effective resistance between $A$ and $B = \frac{10}{3} Ω$

PHXII03:CURRENT ELECTRICITY

356967 The effective resistance of a parallel connection that consists of four wires of equal length, equal area of cross-section and same material is $0.25 Ω .$ What will be the effective resistance if they are connected inseries?

1

0.5 Ω

2

1 Ω

3

4 Ω

4

0.25 Ω

Explanation:

For parallel connection $R_{P} = \frac{R}{n} = 0.25 Ω$
$\Rightarrow R = 1 Ω (n = 4)$
For series connection
$R_{s} = n R = 4 \times 1 = 4 Ω$

NEET - 2021

PHXII03:CURRENT ELECTRICITY

356968 The equivalent resistance between points $A$ and $B$ is
supporting img

1

2 R

2

(3 / 4) R

3

(4 / 3) R

4

(3 / 5) R

PHXII03:CURRENT ELECTRICITY

356969 Assertion :
In the following circuit the net resistance between points $A$ and $B$ is $r$ .
Reason :
All the resistance are in parallel to each other.
supporting img

1 Both assertion and reason are correct and reason is the correct explanation of assertion.

2 Both assertion and reason are correct but reason is not the correct explanation of assertion.

3 Assertion is correct but reason is incorrect.

4 Assertion is incorrect but reason is correct.

Explanation:

Let $C$ and $D$ be two points on the circuit
supporting img
The circuit can be redrawn as

It is a wheatstone bridge $r_{e q} = r$
All the resistors are not in parallel. So option (3) is correct.

PHXII03:CURRENT ELECTRICITY

356970 Five resistances are connected as shown in the figure. The effective resistance between points $A$ and $B$ is
supporting img

1

\frac{10}{3} Ω

2

\frac{10}{17} Ω

3

40 Ω

4

45 Ω

Explanation:

supporting img

The effective resistance between $A$ and $B = \frac{10}{3} Ω$

PHXII03:CURRENT ELECTRICITY

356967 The effective resistance of a parallel connection that consists of four wires of equal length, equal area of cross-section and same material is $0.25 Ω .$ What will be the effective resistance if they are connected inseries?

1

0.5 Ω

2

1 Ω

3

4 Ω

4

0.25 Ω

Explanation:

For parallel connection $R_{P} = \frac{R}{n} = 0.25 Ω$
$\Rightarrow R = 1 Ω (n = 4)$
For series connection
$R_{s} = n R = 4 \times 1 = 4 Ω$

NEET - 2021

PHXII03:CURRENT ELECTRICITY

356968 The equivalent resistance between points $A$ and $B$ is
supporting img

1

2 R

2

(3 / 4) R

3

(4 / 3) R

4

(3 / 5) R

PHXII03:CURRENT ELECTRICITY

356969 Assertion :
In the following circuit the net resistance between points $A$ and $B$ is $r$ .
Reason :
All the resistance are in parallel to each other.
supporting img

1 Both assertion and reason are correct and reason is the correct explanation of assertion.

2 Both assertion and reason are correct but reason is not the correct explanation of assertion.

3 Assertion is correct but reason is incorrect.

4 Assertion is incorrect but reason is correct.

Explanation:

Let $C$ and $D$ be two points on the circuit
supporting img
The circuit can be redrawn as

It is a wheatstone bridge $r_{e q} = r$
All the resistors are not in parallel. So option (3) is correct.

PHXII03:CURRENT ELECTRICITY

356970 Five resistances are connected as shown in the figure. The effective resistance between points $A$ and $B$ is
supporting img

1

\frac{10}{3} Ω

2

\frac{10}{17} Ω

3

40 Ω

4

45 Ω

Explanation:

supporting img

The effective resistance between $A$ and $B = \frac{10}{3} Ω$

PHXII03:CURRENT ELECTRICITY

356967 The effective resistance of a parallel connection that consists of four wires of equal length, equal area of cross-section and same material is $0.25 Ω .$ What will be the effective resistance if they are connected inseries?

1

0.5 Ω

2

1 Ω

3

4 Ω

4

0.25 Ω

Explanation:

For parallel connection $R_{P} = \frac{R}{n} = 0.25 Ω$
$\Rightarrow R = 1 Ω (n = 4)$
For series connection
$R_{s} = n R = 4 \times 1 = 4 Ω$

NEET - 2021

PHXII03:CURRENT ELECTRICITY

356968 The equivalent resistance between points $A$ and $B$ is
supporting img

1

2 R

2

(3 / 4) R

3

(4 / 3) R

4

(3 / 5) R

PHXII03:CURRENT ELECTRICITY

356969 Assertion :
In the following circuit the net resistance between points $A$ and $B$ is $r$ .
Reason :
All the resistance are in parallel to each other.
supporting img

1 Both assertion and reason are correct and reason is the correct explanation of assertion.

2 Both assertion and reason are correct but reason is not the correct explanation of assertion.

3 Assertion is correct but reason is incorrect.

4 Assertion is incorrect but reason is correct.

Explanation:

Let $C$ and $D$ be two points on the circuit
supporting img
The circuit can be redrawn as

It is a wheatstone bridge $r_{e q} = r$
All the resistors are not in parallel. So option (3) is correct.

PHXII03:CURRENT ELECTRICITY

356970 Five resistances are connected as shown in the figure. The effective resistance between points $A$ and $B$ is
supporting img

1

\frac{10}{3} Ω

2

\frac{10}{17} Ω

3

40 Ω

4

45 Ω

Explanation:

supporting img

The effective resistance between $A$ and $B = \frac{10}{3} Ω$

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