a coil has a resistance of 18 ohms when its mean temperature is 20C and of...
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coil has a resistance of 18 ohms when its mean temperature is 20C
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it is found that the resistance of a coil of wire increases from 40 ohms at...
it is found that the resistance of a coil of wire increases from 40 ohms at 15C to 50 ohms at 60C. calculate the resistance temperature coefficient at 0C of the conductor material?
a discharging RC circuit has its charge reduced from 20C to 15C in 20 seconds. If...
a discharging RC circuit has its charge reduced from 20C to 15C in 20 seconds. If the resistance of the circuit is 10 ohms. What is the capacitance. pls show work.
A galvanometer has a coil resistance of 100 ohms and gives a full scale deflection when...
A galvanometer has a coil resistance of 100 ohms and gives a full scale deflection when the potential difference across it is 0.0005 V. What size resistor (with a value measured in ohms) is required to make a 5.0 A. full scale deflection ammeter?
The tungsten filament of an incandescent lamp has a resistance of 200 Ohms at room temperature....
The tungsten filament of an incandescent lamp has a resistance of 200 Ohms at room temperature. A) What would the resistance be at an operating temperature of 1600 C? B) Assuming it is plugged into a 120-V outlet, what is its power output when just starting up? C) By how much does its power output change from the room temperature value when it is at its operating temperature?
A coil which has an inductance of 40mH and a resistance of 2 ohms is connected...
A coil which has an inductance of 40mH and a resistance of 2 ohms is connected together to form a LR series circuit. If they are connected to a 20 V DC supply (10 points) • What will be the time constant of the RL series circuit? • What will be the value of the circuit current one time constant after the switch is closed. • What will be the final steady state value of the current?
Q2i) A PMMC voltmeter of range (0-550V) with a resistance of 10 ohms has a coil...
Q2i) A PMMC voltmeter of range (0-550V) with a resistance of 10 ohms has a coil of effective depth of 3 mm and a width of 2.5 cm, the coil has about 100 turns. The flux density spread in the air gap is of 0.01Wb/m². The spring constant is considered to be 3.2*10* Calculate, Control torque produced by the coil, when it is connected to 37V to measure. [2.5] b. The angle of deflection that the pointer takes, if the...
A platinum resistance thermometer has a re- sistance of 200 ohms. A platinum resistance thermometer has...
A platinum resistance thermometer has a re-
sistance of 200 ohms.
A platinum resistance thermometer has a resistance of 200 ohm when placed in an ice 0 degree C bath and 290.8 Ohm when immersed in a crucible containing a melting substance. What is the melting point of the substance? The temperature coefficient of the platinum is 0.00392 (degreeC)^-1 . The resistor was calibrated at a temperature of 20 degree C. Answer in units of degree C. A platinum resistance...
Q2) A coil has a resistance of 4 ohms and an inductance of 9.55 mh connected...
Q2) A coil has a resistance of 4 ohms and an inductance of 9.55 mh connected in parallel. Calculate a) the reactance, b) the impedance, c) the current taken across both resistor and inductor, d) total current Supply voltage is 220V and frequency is 50 Hz
A length of AWG #12 copper wire has a resistance of 0.020 Ohms at 20 °C....
A length of AWG #12 copper wire has a resistance of 0.020 Ohms at 20 °C. Calculate the temperature for which the resistance is 0.023 Ohms.
A copper wire has a resistance of 9.00 ohms at 33.0 degrees. Determine the resistance (in...
A copper wire has a resistance of 9.00 ohms at 33.0 degrees. Determine the resistance (in ohm) at 433 degrees celsius. The temperature coefficient of resistivity for copper wire is 3.90*10^-3 degrees celsius to the negative one power. (Assume that the temperarure coefficient of resistivity was measured using the reference temperature 20 degrees celsius.)
A coil which has an inductance of 40mH and a resistance of 2 ohms is connected together to form a LR series circuit. If they are connected to a 20 V DC supply (10 points) • What will be the time constant of the RL series circuit? • What will be the value of the circuit current one time constant after the switch is closed. • What will be the final steady state value of the current?
Q2i) A PMMC voltmeter of range (0-550V) with a resistance of 10 ohms has a coil of effective depth of 3 mm and a width of 2.5 cm, the coil has about 100 turns. The flux density spread in the air gap is of 0.01Wb/m². The spring constant is considered to be 3.2*10* Calculate, Control torque produced by the coil, when it is connected to 37V to measure. [2.5] b. The angle of deflection that the pointer takes, if the...
A platinum resistance thermometer has a re-
sistance of 200 ohms.
A platinum resistance thermometer has a resistance of 200 ohm when placed in an ice 0 degree C bath and 290.8 Ohm when immersed in a crucible containing a melting substance. What is the melting point of the substance? The temperature coefficient of the platinum is 0.00392 (degreeC)^-1 . The resistor was calibrated at a temperature of 20 degree C. Answer in units of degree C. A platinum resistance...
Q2) A coil has a resistance of 4 ohms and an inductance of 9.55 mh connected in parallel. Calculate a) the reactance, b) the impedance, c) the current taken across both resistor and inductor, d) total current Supply voltage is 220V and frequency is 50 Hz
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