Electricity

Question 1

Define a short circuit

Answer 1

A short circuit is a path of very low resistance…

Question 2

Define: terminal potential difference

Answer 2

The potential difference across the terminals of a battery when there is a current in the circuit.

Question 3

Define:Internal resistance

Answer 3

Internal resistance is the amount of resistance across the terminals of a battery.

Question 4

Define: power

Answer 4

Power is the rate at which electrical energy is converted into other forms of energy in an electric circuit.

Power is defined as the amount of electrical energy delivered by a battery per second or the amount of electrical energy dissipated in a resistor per second.

Question 5

Define:a parallel circuit

Answer 5

A parallel circuit is when the resistors in the circuit are placed on different pathways

Question 6

Define: a series circuit

Answer 6

A series circuit is when the resistors are places one after each other

Question 7

Define: a non-ohmic conductor

Answer 7

A non ohmic conductor is a conductor which has a resistance which varies with the current.

Question 8

Define: a ohmic conductor

Answer 8

An ohmic conductor is a conductor where the resistance does not vary with the current

Question 9

Define: conventional current

Answer 9

Conventional current is the direction Positive charge moves in a circuit. Positive charge moves from the positive terminal of a battery to the negative terminal.

Question 10

Define: electron flow

Answer 10

Electron flow is the direction in which electrons move in a metal. Electrons move from the negative terminal to the positive terminal.

Question 11

Define: emf

Answer 11

Emf is the total energy supplied per coulomb of charge by the battery.

Question 12

Define: ohms law

Answer 12

Ohms law states that the current is directly proportional to the potential difference across the conductor at constant temperature

Question 13

Define: potential difference

Answer 13

Potential difference between two points in a circuit is defined as the amount of work done (w) per coulomb of charge between these two points.

Question 14

Define: current

Answer 14

Current is the rate of flow of charge. Or in other words current is the quantity of charge that passes a point in the circuit per second

Question 15

Define: Resistance

Answer 15

Resistance is defined as a materials opposition to the flow of electric current

Question 16

Define: Fuse

Answer 16

A fuse is a device which protects appliances from damage due to high current.