Using the state mileage guide table located on the top of each map page you can

An electronic toy is powered by three 1.58-V alkaline cells, each with an internal resistance of 0.0205 Ω, and a 1.53-V carbon-z

mina [271]

Answer:

(a) The current in amperes that flows through the toy's circuit is 0.923A

(b) The power supplied to the toy is 5.78721W

(c) The internal resistance r2 of the failed dry cell is 72Ω

Explanation:

From the circuit diagram attached. We have the electric component:

B1 = 3* 1.58 = 4.74V

B2 = 1.53V

r1 = 3*0.0205 = 0.0615Ω

r2 = 0.105Ω

R = 6.625Ω

Since the internal resistances and the resistor R are connected in series, we can calculate the total resistance RT as

RT = r1 + r2 +R = 0.0615 + 0.105 + 6.625

= 6.7915Ω

Total Voltage supplied to the circuit by both batteries V = B1 + B2 = 4.74 + 1.53 = 6.27V

(a) CIRCUIT CURRENT

The current I, flowing through the circuit is i = $\frac{V}{R_{T}}$ = $\frac{6.27}{6.7915}$ =0.923A

The current in amperes that flows through the toy's circuit is 0.923A

(b) THE POWER SUPPLIED TO THE TOY

Power P = I*V =0.923*6.27 = 5.78721W

The power supplied to the toy is 5.78721W

(c) THE VALUE OF r2

Due to dry cell failure, the power supplied to the toy is reduced to 0.5W

Now Power P = $\frac{V^{2} }{R}$ . To calculate the new total resistance of the circuit we will make R the subject of the formular

R= $\frac{V^{2} }{P}$ = $\frac{6.27^{2} }{0.5}$ = $\frac{39.3129}{0.5}$ = 78.6258Ω

Remember that RT = r1 + r2 + R

r1 =RT- (R +r2)

r1 = 78.6258 - 6.6865 =71.9393Ω

The internal resistance r2 of the failed dry cell is 72Ω

6 0

4 years ago

Read 2 more answers

What cause accident in a workplace?

vampirchik [111]

Answer:

by receiving personal calls you can be fired from job

3 0

3 years ago

Read 2 more answers

A piston-cylinder device contains helium gas. During a reversible, isothermal process, the entropy of the helium will _________

DiKsa [7]

Answer:

During a reversible, adiabatic process, the entropy of the helium will NEVER increase.

During a reversible, isothermal process, the entropy of the helium will SOMETIMES increase

During an actual adiabatic process, the entropy of the helium will DEFINITELY increase

5 0

3 years ago

What is a calibration? What are the four types of instrument errors?

Nastasia [14]

Answer and Explanation:

Calibration can be defined as a process where the accuracy of an instrument is measured and are compared with the known and set standards for calibration.

The instrument errors can be defined any deflection from the true value in the measurement or we can say that any difference between measured value and actual or true value results in instrument errors.

The instrument errors are further classified into 4 types:

a). Random errors :

These error arise as the result of random, unpredictable or irregular changes in an experimental set up.

b). Systematic errors :

These errors arises as a result of fault in the instrument or as a result of the effects of some external factors.

c). Gross errors:

These errors are a result of human errors in measurement while recording the reading, etc

d). Zero errors:

This error arises when the reading of the instrument is false while the measured value is equal to zero.

This is when the needle of an ammeter or voltmeter is not at zero but somewhere above or below it when the supply is not given.

7 0

4 years ago

A brittle failure has extensive plastic deformation in the vicinity of the advancing crack. This process proceeds relatively slo

Tomtit [17]

Answer:

False ( b )

Explanation:

In a brittle failure the cracks spreads rapidly without a significant deformation, and the cracks are very unstable with the cracks extending without an increase in the amount of applied stress.

Therefore the above description in the question is false.

3 0

3 years ago