Homework Help: Physics

Posted by Emmanuel on Tuesday, November 23, 2010 at 5:08am.

A battery of three cells in series each of emf 2v and internal 0.5 ohms is connected to 2ohms resistor in series with a parallel combination of two 3ohms resistors (a)draw the circult diagram (b)the effective of external resistance (c)the current in the circult (d)the lost volt in the battery (e)the current in one of the 3ohms resistor

Physics - Henry, Wednesday, November 24, 2010 at 6:29pm
I can't draw the circuit here, but i can analize the circuit:

a. Rt = 0.5 + 2 + (3 * 3) / (3 + 3) = 0.5 + 2 + 1.5 = 4 ohms = total
resistance in circuit.

b. The external circuit reduces the battery voltage.

c. I = V/Rt = 6 / 4 = 1.5Amps = the
current in circuit.

d. Vi = I*Ri = 1.5 * 0.5 = 0.75 volts
= Voltage drop across internal resistance.

e. The current divides equally between
the two 3 ohm resistors:

I3 = I / 2 = 1.5 / 2 = 0.75 Amps =
current thru each 3 ohm resistor.

Answer this Question

Related Questions

physics - a battery with and emf of 12V and an internal resistance of 0.5 ohms, ...
Physics - Batteries are not perfect. Instead they have an "internal ...
Physics - Batteries are not perfect. Instead they have an "internal ...
Phyics - A resistor has a resistance R, and a battery has an internal resistance...
physics - a 2 uF capacitor is connected in series with a 1.2 M ohms resistor and...
physics - The current in a 51 resistor is 0.14 A. This resistor is in series ...
physics - A circuit consists of a 12.0 V battery connected to three resistors 44...
physics - Three similar ideal cells (no internal resistances) supply current of ...
physics - Three similar ideal cells (no internal resistances) supply current of ...
College Physics - Two 9.1 ohms resistors are connected in parallel, as are two 5...

For Further Reading

First Name:
School Subject:
Answer: