In Fig. 27-58, a voltmeter of resistance R v = 300 Ω and an Ammeter of resistance R A = 3.00 Ω are being used to measure a resistance R in a circuit that also contains a resistance R 0 = 100 Ω and an ideal battery with an emf of ℰ = 12.0 V. Resistance R is given by R = Vli, where V the potential across R and i is the ammeter reading. The voltmeter reading is V’, which is V plus the potential difference across the ammeter. Thus, the ratio of the two meter readings is not R but only an apparent resistance R’ = V'li. If R = 85.0 Ω, what arc (a) the ammeter reading, (b) the voltmeter reading, and (c) R’? (d) If R A is decreased, does the difference between R' and R increase, decrease, or remain the same? Figure 27-58 Problem 51.
In Fig. 27-58, a voltmeter of resistance R v = 300 Ω and an Ammeter of resistance R A = 3.00 Ω are being used to measure a resistance R in a circuit that also contains a resistance R 0 = 100 Ω and an ideal battery with an emf of ℰ = 12.0 V. Resistance R is given by R = Vli, where V the potential across R and i is the ammeter reading. The voltmeter reading is V’, which is V plus the potential difference across the ammeter. Thus, the ratio of the two meter readings is not R but only an apparent resistance R’ = V'li. If R = 85.0 Ω, what arc (a) the ammeter reading, (b) the voltmeter reading, and (c) R’? (d) If R A is decreased, does the difference between R' and R increase, decrease, or remain the same? Figure 27-58 Problem 51.
In Fig. 27-58, a voltmeter of resistance Rv= 300 Ω and an Ammeter of resistance RA = 3.00 Ω are being used to measure a resistance R in a circuit that also contains a resistance R0 = 100 Ω and an ideal battery with an emf of ℰ = 12.0 V. Resistance R is given by R = Vli, where V the potential across R and i is the ammeter reading. The voltmeter reading is V’, which is V plus the potential difference across the ammeter. Thus, the ratio of the two meter readings is not R but only an apparent resistance R’ = V'li. If R = 85.0 Ω, what arc (a) the ammeter reading, (b) the voltmeter reading, and (c) R’?(d) If RA is decreased, does the difference between R' and R increase, decrease, or remain the same?
The combined electrical resistance R of the resistances R1 and R2 connected in
1
R1
1
1
parallel , is given by
where R, R, and R2 are measured in ohms.
R2
R
The resitance R, is increasing at the constant rate of 10 ohms per minute while the
resistance R2 is decreasing at the constant rate of 35 ohms per minute.
At what rate is the resistance R changing when R, = 25 ohms and R2 = 100 omhs?
Enter your answer without units.
Enter an integer or a fully reduced fraction such
4,-16 , 3/7 , 1/9 etc.
No spaces please.
Cylindrical-conductors has inner and outer radii of
2 mm and 75 mm, respectively. If V(ρ = 2 mm) = 150 V and V(ρ = 75 mm) = 0 V, εr = 10, dielectric conductivity 5×10-4 s/m, the dielectric resistance equals to?
Two capacitors are connected in a circuit in series. The capacitances are C1 = 18 μF, and C2 = 8.5 μF and Ctot=5.77μF. Calculate the numerical value of Q in C given ΔV = 19 V.
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