The SI unit of power is Watt (W) which is joules per second (J/s). Sometimes the power of motor vehicles and other machines is given in terms of Horsepower (hp), which is approximately equal to 745.7 watts.

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**4) **What is the unit of power ?

**Answer is:**

## kilo watt

**Explanation:**

**Related Basic Electricity MCQ - Electrician (Set-1) with Answers**

**Answer is:**

### ohm metre

**Explanation:**

Specific Resistance (”ρ”) is a property of any conductive material, a figure used to determine the end-to-end resistance of a conductor given length and area in this formula: R = ρl/A. Specific resistance for materials are given in units of Ω-cmil/ft or Ω-meters (metric).

**Answer is:**

### Heater resistance

**Explanation:**

Heater resistance is the example for medium resistance.

**Answer is:**

### kilo watt hour

**Explanation:**

Kilowatt Hour (kWh) is the commercial unit of electrical energy.; one kilowatt-hour is equivalent to 3.6 megajoule.

**Answer is:**

### Positive temperature coefficient

**Explanation:**

A positive temperature coefficient (PTC) refers to materials that experience an increase in electrical resistance when their temperature is raised. Materials which have useful engineering applications usually show a relatively rapid increase with temperature, i.e. a higher coefficient.