A true rms voltmeter (assumed noiseless) with an effective noise bandwidth of 30 MHz is used to measure the noise voltage produced by the following devices. Calculate the meter reading in each case.
(a) A 10 k Ω resistor at room temperature, T⁰ = 290^o K.

(b) A 10 k Ω resistor at 29^◦ K.

(c) A 10 k Ω resistor at 2.9^◦ K.
(d) What happens to all of the above results if the bandwidth is decreased by a factor of 4? a factor of 10? a factor of 100?