额定电压 | 220V | |
频率 | 50Hz | |
额定功率 | 高挡 | 1800W |
中挡 | 1200W | |
低挡 | 500W |
A.电饭煲是利用电流的热效应工作的 |
B.电饭煲在中挡正常工作时电热丝阻值比低挡正常工作时小 |
C.电饭煲在高挡正常工作10min,消耗的电能是1.08×106J |
D.若家中只接入电饭煲,在高挡正常工作10min,电能表示数将变成7328.6kW·h |
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2