Two students A and B were asked to pick a resistor of `15 k Omega` from a collection of carbon resistors. A picked a resistor with bands of colour: brown, green, orange while B choose a resistor with bands black, green, red. Who picked the correct resistor? Explain.

Explanation

For student A, the numbers attached to brown, green and orange are 1,5 and 3 . So the value of resistor is, `R_(A)=15 xx10^(3) Omega = 15 k Omega`.
For student B, the numbers attached to black, green and red are 0,5 and 2 respectively. So the value of resistor is, `R_(B) = 05 xx 10^(2) Omega = 500 Omega`.
Thus, student A picked up the correct resistor of `15 k Omega`.