Single-An
electric heater draws 10A from a 380-V line. The resistance R of the
heater is ()
A: 3800Ω
B: 380Ω
C: 38Ω
D: 3.8Ω
electric heater draws 10A from a 380-V line. The resistance R of the
heater is ()
A: 3800Ω
B: 380Ω
C: 38Ω
D: 3.8Ω
举一反三
- ()An<br/>electric heater draws 10A from a 380-V line. The resistance R of the<br/>heater is () A: 3800Ω B: 380Ω C: 38Ω D: 3.8Ω
- An electric heater draws 10 A from a 120V line. The resistance of the heater is .A. 1200 Ω B. 120 ΩC. 12 Ω D. 1.2 Ω
- A 3.3kW electric heater is connected to a 220VAC supply. （1）Calculate the current drawn from the supplyA. （2）Calculate the resistance of the heating element（2.s.f.）Ω （3）Calculate the energy (in kWh) used by the heater in a 24 hour periodkWh （4）If the supply voltage drops to 208V, what is the power used by the heater.kW（2s.f.）
- There's an electric( heater) in the bedroom. A: 空调 B: 暖炉
- 单相变压器原边电压为380V，副边电流为2A，变压比K=10，副边电压为()V。 A: 38 B: 380 C: 3.8 D: 10