Q1. For a cylindrical resistor made of ohmic material, the resistance does NOT depend on? Then brief explanation
A. The current
B. the length
C. the cross-sectional area
D. the resistivity
E. the electron drift velocity
Q2. It is better to send 10,000 kW of electric power long distances at 10,000V rather than at 220V because: Then brief explanation
A. The resistance of the wires is less at high voltages
B. more current is transmitted at high voltages
C. the insulation is more effective at high voltages
D. there is less heating in the transmission wires
E. None of above
Q3. A 100.0 Ohm resistor is connected to a 9.00V battery. What is the power (the rate of energy consumption) of this resistor?