# physics

What emf is required to cause 12 amperes to flow through a resistance of 7.2 ohms?

1. 👍 0
2. 👎 0
3. 👁 86
1. V = I*R (Ohm's law)

V = 86.4 Volts

1. 👍 0
2. 👎 0
posted by drwls

## Similar Questions

1. ### Physics

A storage battery has an emf of 6.3 volts and an internal resistance of 0.01 ohm. it is to be charged for 120 amperes.hours from a 30 volt emf source having a resistance of 0.08 ohm at the rate of 20 amperes. a. compute for the

asked by Frank on September 16, 2015
2. ### physics

A battery X of emf 6volt and internal resistance 2(ohms) is connected in series with a battery Y of emf 4volt and internal resistance 8(ohms) so that the two emf act to oppose each other, calculate the terminal P.D of X and Y

asked by ronald on March 12, 2019
3. ### Physics

what current will flow through a resistance of 11 ohms when the emf impressed acrosss the resistance is 2.8 volts?

asked by Nilan on May 17, 2011
4. ### science

Calculate the resistance in a circuit in which a 9-volt battery produces 3 amperes. A)3 ohms B)6 ohms C)9 ohms D)27 ohms

asked by Lizette on October 12, 2007
5. ### Phyics

A resistor has a resistance R, and a battery has an internal resistance r. When the resistor is connected across the battery, ten percent less power is dissipated in R than would be dissipated if the battery had no internal

asked by ALan on February 10, 2010
6. ### Physics

In an electrical circuit, the current passing through a conductor varies inversely with the resistance. Suppose that when the current is 8A (amperes), the resistance is 15 ohms. What is the current when the resistance is 4 ohms?

asked by Rachal on February 9, 2011
7. ### beginning algebra

In an electrical circuit, the current passing through a conductor varies inversely with the resistance. Suppose that when the current is 8A (amperes), the resistance is 15 ohms. What is the current when the resistance is 4 ohms?

asked by Rachal on February 8, 2011
8. ### physics

five resistors of 30 ohms each are connected in parallel across a 120 volt line. the combined resistance of the five resistors is ___ ohms. The total current in the circuit is ___ amperes. The current in each branch is ___