1. | a straight line | 2. | circular |
3. | elliptical | 4. | a plane |
1. | \(OP=R\) | 2. | \(OP=\dfrac R2\) |
3. | \(OP=\sqrt3R\) | 4. | \(OP=8R\) |
1. | \(2\) | 2. | \(\frac43\) |
3. | \(\frac32\) | 4. | \(4\) |
1. | \(6.28 \times 10^{-4} ~\text{T} \) | 2. | \(6.28 \times 10^{-2}~\text{T}\) |
3. | \(12.56 \times 10^{-2}~\text{T}\) | 4. | \(12.56 \times 10^{-4} ~\text{T}\) |