1/ if a student makes a cylindrical resistor of the dimensions of 2.7 mm long with...
1/ if a student makes a cylindrical resistor of the dimensions of 2.7 mm long with radius of 3.1 mm out of a material with festivity of 38671.1 E(-8) OHMM. how much resistance will it have ?
2/ there are resistors in the parallel. 9.3 ohm and 8.2 ohm. what is the total resistance of these resistance ?
3/ how much current will pass through a resistor of 3.8 ohm if an electric potential of 3.2 V is applied for it
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1/ if a student makes a cylindrical resistor of the dimensions
of 2.7 mm long with...
Chapter 26, Problem 064 A cylindrical resistor of radius 2.7 mm and length 3.0 cm is...
Chapter 26, Problem 064 A cylindrical resistor of radius 2.7 mm and length 3.0 cm is made of material that has a resistivity of 2.8 x 10-5 2.m. What are (a) the magnitude of the current density and (b) the potential difference when the energy dissipation rate in the resistor is 1.0 W? (a) Number Units (b) Number Units SHOW HINT
A potentiometer is essentially a resistor with three contacts, one of which is mobile. It acts...
A potentiometer is essentially a resistor with three contacts, one of which is mobile. It acts as a variable resistor, since changing the position of the mobile contact, called the "wiper" (denoted by an arrow), changes the amount of the resistor through which current must pass. The circuit shown consists of one 93.7 V battery, one fixed resistor with resistance Ri = 1780 N, and one potentiometer. In addition, one of the wires is grounded (at zero potential). The resistive...
(4 points) A cylindrical resistor is made of a material with 4 x 1027 mobile electrons...
(4 points) A cylindrical resistor is made of a material with 4 x 1027 mobile electrons per cubic meter and an electron mobility of 6 × 10 5 m/s per V/m. The resistor is 1.2 cm long with a radius of 0.35 mm. The potential difference from one end of the resistor to the other is 2.6 volts. 6, (a) What is the magnitude of the electric field in the resistor? (b) What is the average drift speed of the...
How much energy is dissipated as heat during a two-minute time interval by a 1 .5-k...
How much energy is dissipated as heat during a two-minute time interval by a 1 .5-k ohm resistor which has a constant 20-V potential difference across its leads? a) 58 J b) 46 J c) 32 J d) 72 J e) 17 J When a voltage VI is placed across a series combination of an unknown resistor R and a 65-ohm resistor, the power delivered to the resistors is Pl. When the 65-ohm resistor is replaced by a 20-ohm resistor...
71. A student makes a homemade resistor from a graphite pencil 5.00 cm long, where the graphite i...
71. A student makes a homemade resistor from a graphite pencil 5.00 cm long, where the graphite is 0.05 mm in diameter. The resistivity of the graphite is 5 ρ 1.38 10 / m − = ×Ω . The homemade resistor is place in series with a switch, a 10.00-mF capacitor and a 0.50-V power source. (a) What is the RC time constant of the circuit? (b) What is the potential drop across the pencil 1.00 s after the switch...
(2) Five identical bulbs (numbered 1-4) are arranged as shown (a) Rank the brightness of from...
(2) Five identical bulbs (numbered 1-4) are arranged as shown (a) Rank the brightness of from BRIGHTEST to DIMMEST (b) What would happen to the brightness of Bulb 1 if the wire was cut between bulbs 2 and 3? Explain 5 (c) You have 3 bulbs, some wire, and a battery. Draw two circuits: One circuit must have have all 3 bulbs be brighter than the ones in the other circuit (3) Find the the current and potential difference for...
PHY1520 Final Review Problems 1) The current density in a cylindrical wire of radius R = 3.0 mm is uniform across the cross section of the wire and is J = 3.0 × 106A/m2, (a) What is the current th...
PHY1520 Final Review Problems 1) The current density in a cylindrical wire of radius R = 3.0 mm is uniform across the cross section of the wire and is J = 3.0 × 106A/m2, (a) What is the current through the outer portion of the wire between radial distances R/2 and R (b) What is the current through the entire cross section of the wire? 2) A conducting loop of radius 1.50 cm and resistance 8 x 10-6Ω is perpendicular...
4a. The resistance of a 5.0 meter length of 14-gauge copper wire is 8.1 x 10...
4a. The resistance of a 5.0 meter length of 14-gauge copper wire is 8.1 x 10 ohms/meter. How much energy loss occurs per second in the wire when a current of 20.0 amps is applied? Assume that the cross-sectional area is 2.1 mm', what is the shortest time in which the applied current could heat the wire by 15.0°C? You may assume that the density of copper is 8.92 x 10 kg/m and its molar heat capacity is 6.0 calories/mole/K....
Pease answer questions 4 and 5! Thank you so much! 4. Connect the 2nd resistor in...
Pease answer questions 4 and 5! Thank you so much!
4. Connect the 2nd resistor in parallel with the 1st
resistor and connect that combination to the battery.
Measure
the following:
The
current passing through the R1, I1 = ___0.0058____ A
The
current passing through the R2, I2 = ___0.0031____ A
The
current supplied by the battery, I = ___0.0092____ A
Calculate I1 + I2 = ____________ A
Is the following statement true? I = I1 +...
Student Physices II, 1 sest, Spring 20 1. Two capacitors (2.0 juF and 4.0 μF) are...
Student Physices II, 1 sest, Spring 20 1. Two capacitors (2.0 juF and 4.0 μF) are connected in parallel seem yow potential difference. Calculate the total stored energy in the system. 2. The resistance of a 3 m length of 20-mm iron wire is found to be 1.8 Q. What is the resistivity of iron? 3. A thin-walled metal sphere has a radius of 25 em and carries a charge of 2.0 10 C. A point charge of 1 .0x10"...
Chapter 26, Problem 064 A cylindrical resistor of radius 2.7 mm and length 3.0 cm is made of material that has a resistivity of 2.8 x 10-5 2.m. What are (a) the magnitude of the current density and (b) the potential difference when the energy dissipation rate in the resistor is 1.0 W? (a) Number Units (b) Number Units SHOW HINT
A potentiometer is essentially a resistor with three contacts, one of which is mobile. It acts as a variable resistor, since changing the position of the mobile contact, called the "wiper" (denoted by an arrow), changes the amount of the resistor through which current must pass. The circuit shown consists of one 93.7 V battery, one fixed resistor with resistance Ri = 1780 N, and one potentiometer. In addition, one of the wires is grounded (at zero potential). The resistive...
(4 points) A cylindrical resistor is made of a material with 4 x 1027 mobile electrons per cubic meter and an electron mobility of 6 × 10 5 m/s per V/m. The resistor is 1.2 cm long with a radius of 0.35 mm. The potential difference from one end of the resistor to the other is 2.6 volts. 6, (a) What is the magnitude of the electric field in the resistor? (b) What is the average drift speed of the...
How much energy is dissipated as heat during a two-minute time interval by a 1 .5-k ohm resistor which has a constant 20-V potential difference across its leads? a) 58 J b) 46 J c) 32 J d) 72 J e) 17 J When a voltage VI is placed across a series combination of an unknown resistor R and a 65-ohm resistor, the power delivered to the resistors is Pl. When the 65-ohm resistor is replaced by a 20-ohm resistor...
(2) Five identical bulbs (numbered 1-4) are arranged as shown (a) Rank the brightness of from BRIGHTEST to DIMMEST (b) What would happen to the brightness of Bulb 1 if the wire was cut between bulbs 2 and 3? Explain 5 (c) You have 3 bulbs, some wire, and a battery. Draw two circuits: One circuit must have have all 3 bulbs be brighter than the ones in the other circuit (3) Find the the current and potential difference for...
PHY1520 Final Review Problems 1) The current density in a cylindrical wire of radius R = 3.0 mm is uniform across the cross section of the wire and is J = 3.0 × 106A/m2, (a) What is the current through the outer portion of the wire between radial distances R/2 and R (b) What is the current through the entire cross section of the wire? 2) A conducting loop of radius 1.50 cm and resistance 8 x 10-6Ω is perpendicular...
4a. The resistance of a 5.0 meter length of 14-gauge copper wire is 8.1 x 10 ohms/meter. How much energy loss occurs per second in the wire when a current of 20.0 amps is applied? Assume that the cross-sectional area is 2.1 mm', what is the shortest time in which the applied current could heat the wire by 15.0°C? You may assume that the density of copper is 8.92 x 10 kg/m and its molar heat capacity is 6.0 calories/mole/K....
Pease answer questions 4 and 5! Thank you so much!
4. Connect the 2nd resistor in parallel with the 1st
resistor and connect that combination to the battery.
Measure
the following:
The
current passing through the R1, I1 = ___0.0058____ A
The
current passing through the R2, I2 = ___0.0031____ A
The
current supplied by the battery, I = ___0.0092____ A
Calculate I1 + I2 = ____________ A
Is the following statement true? I = I1 +...
Student Physices II, 1 sest, Spring 20 1. Two capacitors (2.0 juF and 4.0 μF) are connected in parallel seem yow potential difference. Calculate the total stored energy in the system. 2. The resistance of a 3 m length of 20-mm iron wire is found to be 1.8 Q. What is the resistivity of iron? 3. A thin-walled metal sphere has a radius of 25 em and carries a charge of 2.0 10 C. A point charge of 1 .0x10"...
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