coil has a resistance of 14 Q at 50°C. If the temperature coefficient of resistance at 0°C is 0.008/"C, the resistance at 0°C is:
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- A coil has a resistance of 18 when it mean temp is from 20o C to 50o C. Find its mean temp rise when its resistance is 21 and the surrounding temp is 15o C. A potential difference of 250 V is applied to a copper field coil at a temp of 15o C and the current is 5A. What will be the mean temp of the coil when the current has fallen to 3.91 A, the applied voltage being the same as before.A coil consists of 2000 turns of copper wire having a cross-sectional area of 0.8 mm2. The mean length per turn is 80 cm and the resistivity of copper is 0.02 un-m. Find the resistance of the coil and power absorbed by the coil when connected across 110 V d.c. supply.H.W-I:- A platinum Coil has a resistance of 3.146 N at (40°c) and 3.7670 at (100°c). Find the resistance at (0"c) and temperature coefficient of resistance at (40°c).
- 1. A coil has a resistance of 18 ohm when its mean temperature is 20 °C and of 20 ohm when its mean temperature is 50°C . Find the mean temperature rise when its resistance is 21 ohm and the surroundings isn15 °C.H.W-I:- A platinum Coil has a resistance of 3.146 N at (40°c) and 3.7670 at (100°c). Find the resistance at (0°c) and temperature cocfficient of resistance at (40°c).A machine coil has a resistance of 46 ohms at 25 degrees celsius. Its temperature coefficient of resistance is 0.0045454 at 20 degrees celsius. At what temperature will its resistance be at 105 ohms
- c) A platinum coil has a resistance of 3.146 at 40°C and 3.767 at 100°C. Find the resistance at 0°C and the temperature -coefficient of resistance at 40°C.An iron core 0.4m long and 5 cm2. In cross section, is wound with 300 turns. When a current of 0.5 A flows in the coil, how much is the inductance of the coil. Assume the core has a permeability of 2500. Ans 350mHk) A coil consists of 2000 turns of copper wire having a cross-sectional area of 0.8 mm2. The mean length per tum is 80cm and the resistivity of copper is 0.02u 52-m. Find the resistance of the coil and power absorbed by the coil when connected across 110v d.c. supply.
- If i have a coil with an inductance 0.14 H and a resistance of 12ohm is connected across a 110V , 25Hz source. how would you make the current in the coil and the phase between the cirrent and supply voltage ?Aluminum coil has a resistance of 8.216 ohms at 70-degree Celsius and 9.615 ohms at 130-degree Celsius. Find the resistance at 30-degree Celsius and the temperature coefficient of resistance at 70- degree Celsius.A coil is made up of 1000 turns of 0.5 mm^2 cross-sectional area copper wire. The average length each turn is 100 cm, and the copper resistivity is 0.02 µΩ m at 20 degrees Celsius. Determine the coil's resistance. Find the resistance of the coil at 20 degrees Celsius. * 30 ohm 40 ohm 50 ohm 60 ohm Find the resistance of the coil at 100 degrees Celsius if the temperature coefficient of resistance at 30 degrees Celsius is 3.7807 x 10^(-3) per degrees Celsius * 32.57 ohm 42.57 ohm 52.57ohm 62.57 ohm