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Current Electricity

Question

Wired Faculty App

Find equivalent resistance between X and Y

R

R/L

2R

5R

Solution

A.

R

The given circuit can be shown in the following way. No, current will be flown in the middle resistance.

The equivalent resistance of R and R' = 2R

Total resistance

$\frac{1}{R'} = \frac{1}{2 R} + \frac{1}{2 R}$

R' = R

Some More Questions From Current Electricity Chapter

What conclusion can you draw from the following observations on a resistor made of alloy manganin?

Current A

Voltage V

Current A

Voltage V

0.2

0.4

0.6

0.8

1.0

2.0

3.94

7.87

11.8

15.7

19.7

39.4

3.0

4.0

5.0

6.0

7.0

8.0

59.2

78.8

98.6

118.5

138.2

158.0

Answer the following questions:
A steady current flows in a metallic conductor of non-uniform cross-section. Which of these quantities is constant along the conductor: current, current density, electric field, drift speed?

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