Question

V1, V2 and V3 are the potential differences across the 1Ω, 2Ω and 3Ω resistors in the following diagram, and the current is 5A.


Which of the following shows the correct values of V1, V2 and V3 measured in volts?

a V1 =1, V2 = 2 and V3 = 3



B
V1 =5, V2 = 10 and V3 = 15



C
V1 =5, V2 = 2.5 and V3 = 1.6



D
V1 =4, V2 = 3 and V3 = 2

Answer 1

Answer:

B

Explanation:

V=IR

VOLTAGE = CURRENT X RESISTANCE

Answer 2

Answer:

B ) V₁ =5, V₂ = 10 and V₃ = 15

Explanation:

According to Ohm's law,

V = I · R

In Series combination, the current will be same in all the resistors.

Hence, here, V ∝ R

So, V reading will be in ratio 1 : 2 : 3

Among the options, when you see that there're two options in this ratio, find the value for any one resistor with V = I · R

For 1 Ω resistor, V = 5 × 1 = 5 Volts.

Hence, the answer goes option B.