# Question: At 20 oC a silicon rod of uniform cross section is

At 20 oC, a silicon rod of uniform cross-section is connected to a battery with a terminal voltage of 6.0 V and a 0.50-A current results. The temperature of the rod is then increased to 25 oC.

(a) What is its new resistance?

(b) How much current does it carry?

(c) If you wanted to cut the current from its room temperature value of 0.50 A to 0.40 A, at what temperature would the rod have to be?

(a) What is its new resistance?

(b) How much current does it carry?

(c) If you wanted to cut the current from its room temperature value of 0.50 A to 0.40 A, at what temperature would the rod have to be?

## Answer to relevant Questions

A platinum wire is connected to a battery. (a) If the temperature increases, will the current in the wire (1) increase, (2) remain the same, or (3) decrease? Why? (b) An electrical resistance thermometer is made of ...An electric water heater is designed to produce 50 kW of heat when it is connected to a 240-V source. What is its resistance? (a) What is the resistance of an immersion-type heating coil if it is to generate 15 kJ of heat per minute when it is connected to a 120-V source? (b) What would the coil’s resistance have to be if instead 10 kJ of heat ...A 5.5-kW water heater operates at 240 V. (a) Should the heater circuit have a 20-A or a 30-A circuit breaker? (A circuit breaker is a safety device that opens the circuit at its rated current.) (b) Assuming efficiency, how ...A battery delivers 2.54 A to a resistor rated at 4.52Ω. When it is connected to a 2.21-Ω resistor, it delivers 4.98 A. Determine the battery’s (a) Internal resistance (assumed constant), (b) Emf, and (c) Terminal ...Post your question