What is the value of the resistor R A 1 Ohm B 2 Ohm C 4 Ohm

What is the value of the resistor R? (A) 1 Ohm (B) 2 Ohm (C) 4 Ohm (D) 6 Ohm (E) 12 Ohm What is the power dissipated through one of the 4 Ohm resistors? (A) 4 W (B) 8 W (C) 16 W (D) 32 W (E) 36 W

Solution

A) total resistance = 4 + 4 + R

I = 2 A

V = 20

V = I * R(total)

Or, 20 = 2 * (8 + R)

Or, R = 2

Option-B) 2

B) power = I²R = 2² * 4 = 16

Option-C) 16