Question

Two parallel resistors both having their values 28 ohms are connected in parallel. The overall current provided by the 28V source is. a) 1A b)2A c) 3A d) 4A​

Answer 1

Answer:

2A

Explanation:

By ohm's law V=IR

28V= (I) X Parallel resistance

parallel resistance $R_{P} = 1/R_{1} + 1/R_{2}$

                              $R_{P} = 1/28 + 1/28 \\ \\ = 2/28 \\ \\ = 1/14$

 total resistance = 14 Ω

current I = 28 V / 14 Ω

              = 2 A

Answer 2

The correct answer is option (b) 2 A.

Given,

Two parallel resistors of 28 Ω are connected in parallel.

A voltage source of 28 V is connected.

To Find,

The overall current provided by a 28 V source.

Solution,

The formula for calculating the equivalent resistance when two resistors are connected in parallel is

1/R = 1/R₁+1/R₂+...

Now,

1/R = 1/28+1/28 = 2/28

1/R = 1/14

R = 14 Ω

Now, using the ohm's law

V = RI

28 = 14*I

I = 28/14 = 2 A

Hence, the current provided by the 28 V source is 2 amperes.

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