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- 1. Compute the resistance of a hardened copper rod 2 meters long and 8 mm in diameter if the resistivity of the material is 1.756 x 10^-8 ohm-meters.Find the resistance (in the unit of Ohm) of a Nichrome rod of diameter d=10 mm and has a length L=7 m (resistivity of Nichrome, P= 1.8x 10 Q.m) a. 0.0003207 b. 2.572 10-8 c. 0.0001604 d. None e. 0.01266Given a resistance of 96.91 Q and a capacitance of 980.14 µF, what is t 1/2? Answer in milliseconds. (Answer to one tenth of a millisecond or N/A if there is no answer.)
- 16. What is the power dissipated in Watts by the 9-ohm resistor? Write the answer in whole number. 1.6 16.0 V 5.00 9.00 1.402 8.0 VR2 V. What is the resistance of The following circuit carries a current of 200.0 mA. 7, - 6 2 V and Vsource = 15 Vi = 6.2 R, V R,2. An aluminum cube has sides of length 1.80 m. What is the resistance between the two opposite faces of the cube? 3. (a) What is the reșistance.of a nichrome wire at 0°C if its resistance is 100 Q at 11.5°C? (b) What is the resistance of a carbon rod at 25.8°C if its temperature coefficient of resistance is 0.0160/°C at 0°C?
- 1. While repairing an electric bulb socket, an electrieian gets a mild shock when a current of. 0.005 A passes through him. The same electrician is killed by a current 0.15 A when he turned on an electric bulb while taking a bath. The voltage in cach situation is equal to 120 V. Find the resistance of the electrician in each situation.A metal wire has a resistance of 10.0 l at a temperature of 20.0 ° C . If the same wire has a resistance of 10.6 lat 90.0 ° C , what is the resistance of this wire when its temperature is 220.0 ° C ?32. A copper conductor has its specific resistance(po) of 1.6 x 106 ohm-cm at 0°C and a resistance temperature coefficient(a20) at 1/254.5 per °C at 20°C. Find: a. specific resistance(p60) at 60°C and b. the resistance- temperature coefficient (a60) at 60°C. (Temperature co-efficient of resistance, 1+aot,
- 8. Given the table, solve for the following: a. Find the resistance of a 10 m long copper wire coil with a diameter of 5 cm forming a cylinder. Resistivity of Materiais at 20°c Copper 168 x10+ b. Find the width of a 10 m long aluminum sheet with a Aluminum 2.65 x10 resistance of 0.1 0. Mercury 98 x10 C. Find the length of a mercury wire coil which has a resistance of 5Q and a diameter of 10 cm forming a cylinder.A piece of wire of length 104.2 cm and cross- sectional area 278.1 cm² is made from a material of resistivity 10.5 ohm-metre. What is the resistance of this wire?3. When the temperature is 5oC, the resistance of the carbon resistor is 217.2Ω. What is the temperature if the resistance is 212.7?