An electric heater is really just a resistor with a voltage across it. If you want...

An electric heater is really just a resistor with a voltage across it. If you want to have 682 W of heat with a voltage V = 112 volts, what resistance (Ω) should the heater coil have?

Solutions

Expert Solution

Given :

heat produced by an electric heater, P = 682 W

voltage, V = 112 V

using an equation, P = V I { eq.1 }

where, I = V / R

then P = V (V / R)

P = V²/ R { eq.2 }

inserting the values in eq.2,

(682 W) = (112 V)² / R

R = (12544 V²) / (682 W)

R = 18.4

The heater coil should have a resistance 18.4 .

genius_generous answered 10 months ago

Next > < Previous

Related Solutions

The voltage across each resistor in the two-resistor circuit is ___________ the voltage across the resistor in the one-resistor circuit.

The current through each resistor in the two-resistor circuit is _________ the current through the resistor in the one-resistor circuit (the circuit in Part A). The voltage across each resistor in the two-resistor circuit is ___________ the voltage across the resistor in the one-resistor circuit. the same as / half half / half twice / half half / twice half / the same as twice / twice

Kirchhoff’s voltage law states that the sum of the voltage drops across a resistor, R, an...

Kirchhoff’s voltage law states that the sum of the voltage drops across a resistor, R, an inductor, L, and a capacitor, C, in an electrical circuit must be the same as the voltage source, E(t), applied to that RLC circuit. Applying the additional fact that the current, I, is related to the charge, q, by the relationship I=dq/dt, the resulting ODE model for the charge in a circuit is: L (d^2 q)/(dt^2 )+R dq/dt+1/C q=E(t). If a 100 sin⁡(60t)source is...

An ac voltage, whose peak value is 150 V, is across a 330 -Ω resistor.

An ac voltage, whose peak value is 150 V, is across a 330 -Ω resistor. What is the peak current in the resistor? answer in A What is the rms current in the resistor? answer in A

1- What is the maximum voltage that can be applied across a 2.3-kΩkΩ resistor rated at...

1- What is the maximum voltage that can be applied across a 2.3-kΩkΩ resistor rated at 1414 watt? Express your answer to two significant figures and include the appropriate units. 2- A certain copper wire has a resistance of 19.0 ΩΩ . At some point along its length the wire was cut so that the resistance of one piece is 7.0 times the resistance of the other. Determine the length of the short piece.Express your answer using two significant figures.-----------...

A) At what angular frequency is the voltage amplitude across the resistor in anL-R-C series circuit...

A) At what angular frequency is the voltage amplitude across the resistor in anL-R-C series circuit at maximum value? (Express your answer in terms of the variables L, C, and R.) B) At what angular frequency is the voltage amplitude across the inductor at maximum value? (Express your answer in terms of the variables L, C, and R.) C) At what angular frequency is the voltage amplitude across the capacitor at maximum value? (Express your answer in terms of the...

Consumers Energy states that the average electric bill across the state is $147.49. You want to...

Consumers Energy states that the average electric bill across the state is $147.49. You want to test the claim that the average bill amount is actually less than $147.49. The hypotheses for this situation are as follows: Null Hypothesis: μ ≥ 147.49, Alternative Hypothesis: μ < 147.49. You complete a randomized survey throughout the state and perform a one-sample hypothesis test for the mean, which results in a p-value of 0.0416. What is the appropriate conclusion? Conclude at the 5%...

Consumers Energy states that the average electric bill across the state is $48.287. You want to...

Consumers Energy states that the average electric bill across the state is $48.287. You want to test the claim that the average bill amount is actually less than $48.287. The hypotheses for this situation are as follows: Null Hypothesis: μ ≥ 48.287, Alternative Hypothesis: μ < 48.287. A random sample of 35 customer's bills shows an average cost of $51.651 with a standard deviation of $8.3447. What is the test statistic and p-value for this test?

Consumers Energy states that the average electric bill across the state is $41.553. You want to...

Consumers Energy states that the average electric bill across the state is $41.553. You want to test the claim that the average bill amount is actually greater than $41.553. The hypotheses for this situation are as follows: Null Hypothesis: μ ≤ 41.553, Alternative Hypothesis: μ > 41.553. A random sample of 47 customer's bills shows an average cost of $43.307 with a standard deviation of $8.0202. What is the test statistic and p-value for this test? 1) Test Statistic: -1.499,...

For your choice of input voltage, load resistor and the value of the ripple voltage (as...

For your choice of input voltage, load resistor and the value of the ripple voltage (as percent of Vdc) design a circuit for the half-wave rectifier. Assuming the value of Von for the diode, calculate theoretically all parameters of the rectifier: Vp, Vdc, Idc, C, Isc, PIV and diode conducting interval.

A resistor of unknown resistance and a 22 Ω resistor are connected across a 20 V...

A resistor of unknown resistance and a 22 Ω resistor are connected across a 20 V emf in such a way that a 2.0 A current is observed in the emf. What is the value of the unknown resistance?

Subjects