Thank you A battery with an emf of 1.5 V delivers a current of 0.44 A to a flash

Question

Thank you

A battery with an emf of 1.5 V delivers a current of 0.44 A to a flashlight bulb for 64 s (see Figure 21-2). Find (a) the charge that passes through the circuit and (b) the work done by the battery. Use the definition of current, I = Delta Q/Delta t, to find the charge that flows through the circuit: Once we know Delta Q, we can use W = Delta Q e to find the work: Note that the more charge a battery moves through a circuit, the more work it does. Similarly, the greater the emf, the greater the work. We can see, then, that a car battery that operates at 12 volts and delivers several amps of current does much more work than a flashlight battery-as expected. How long must the flashlight battery operate to do 150 J of work?

Explanation / Answer

W=QE

IXT=Q

150=I*TX12

12.5=I*T

T=12.5/I

=TIME WILL VARY WITH CURRENT IF CURRENT INCREASE TIME WILL DECREASE AND VICE-VERSA

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