One henry is equal to

Options

A. 1 weber/ampere
B. 1 weber/volt
C. 1 weber ampere
D. 1 weber volt

Answer

To determine what one henry is equal to, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Inductance**: Inductance (L) is a property of an electrical circuit that opposes changes in current. The unit of inductance is the henry (H).

2. **Magnetic Field and Current Relationship**: When a current (i) flows through a loop, it generates a magnetic field (B). The strength of this magnetic field is proportional to the current flowing through the loop.

3. **Magnetic Flux**: The magnetic flux (Φ) through the loop is also proportional to the current. The relationship can be expressed as:
\[ \Phi = L \cdot i \]
where:
- Φ is the magnetic flux,
- L is the inductance in henries,
- i is the current in amperes.

4. **Defining One Henry**: To define one henry, we can rearrange the equation:
\[ L = \frac{\Phi}{i} \]
Therefore, one henry (1 H) can be defined as the inductance that produces a magnetic flux of one weber (1 Wb) when a current of one ampere (1 A) flows through the loop.

5. **Final Expression**: Thus, we can express one henry as:
\[ 1 \text{ H} = \frac{1 \text{ Wb}}{1 \text{ A}} \]

### Final Answer:
One henry is equal to one weber per one ampere:
\[ 1 \text{ H} = \frac{1 \text{ Wb}}{1 \text{ A}} \]