A 6.0 ohm resistor is connected to a 15 V battery. What is the current in the circuit? How much thermal...?

Question

A 6.0 ohm resistor is connected to a 15 V battery.

a. What is the current in the circuit?
b. How much thermal energy is produced in 10.0 minutes?

Please help me with this problem.
I don't understand it.

Answer 1

I can tell you the answer to the first one.

Given: V=15V, R=6 ohms
Required: I, Current
Solution: I = V/R
Analysis: I - 15/6
Therefore the current in the circuit is equivalant to 2.5A

Answer 2

Two 10 ohm resistors are connected in parallel across the terminals of a 15 V battery. What is the effective resistance of the circuit? 10/2 ohms = 5 ohms What current flows in the circuit? 15V / 5ohms = 3 amps What is the current through each resistor? 3/2 amps.

Answer 3

15 volts across 6 ohms is a current of
15/6 = 2.5 amperes. (It's called Ohms Law, and you had best have it memorized within the next couple of days)
The rate of energyconsumption by the circuit is
15*2.5 = 15²/6 = 37.5 watts. (More Ohms Law)
1 watt is an energy consumption rate of 1 Joule/second, so after 10 minutes (600 seconds) the circuit will have converted
37.5*600 = 22,500 Joules to thermal energy
Thermal energy is measured in calories, and one standard calorie is equal (more or less) to 4.186 Joules, so the total thermal energy is
22,500/4.186 = 5,375 calories.

HTH

Doug

Answer 4

neglecting the internal resistance of the battery, we get:
current C=V=R=15/6 =2.5 amperes.
2.short circuiting. high current
thermal energy=v^2/R=225/6 =37.5 joules