BTEC APPLIED SCIENCE: UNIT 3: ELECTRICAL CIRCUITS:

Question 1

What is the voltage also known as?

Accepted Answer

The potential difference, V

Question 2

What is the energy transferred measured in?

Accepted Answer

Joules (J)

Question 3

Long wires have a greater resistance

Accepted Answer

True

Question 4

What is the potential difference measured in?

Accepted Answer

Volts (V)

Question 5

As more resistors are added to a series circuit the total resistance will

Accepted Answer

Increase

Question 6

What are the main ways of increasing the current in a circuit?

Accepted Answer

(a). Changing the voltage, (d). Using fewer bulbs in the circuit

Question 7

What is power measured in?

Accepted Answer

Watts, W

Question 8

What equation do we use when we don't know what the current is?

Accepted Answer

Power= Voltage (squared) x Resistance

Question 9

The relationship between voltage, current and resistance is known as

Accepted Answer

Ohm's law

Question 10

When plotting the voltage (p.d.) against the current for the resistor it will

Accepted Answer

Produce a straight line graph, Produce a linear line graph, Pass through the origin of the graph

Question 11

What is the equation that links energy transferred, potential difference and charge?

Accepted Answer

E= pd x c

Question 12

The electrical energy transferred each second is found by multiplying the voltage and the

Accepted Answer

Current

Question 13

The rate at which energy is transferred or changed is known as

Accepted Answer

Power

Question 14

Wires with a thicker diameter have a greater resistance

Accepted Answer

False

Question 15

What is the charge measured in?

Accepted Answer

Coulombs (c)

Question 16

What is the equation for power?

Accepted Answer

P= E/T, Power= Energy/Time

Question 17

As more resistors are added in a parallel circuit the total resistance will

Accepted Answer

Decrease

Question 18

What factor can affect the resistance of a conductor?

Accepted Answer

The diameter of the wire, Temperature, The length of the wire, The material

Question 19

If we don't know what the voltage is we use the equation:

Accepted Answer

Power= Current (squared) x Resistance

Question 20

Resistance is measured in

Accepted Answer

Ohms

Question 21

What metal when used as a conductor affects the resistance?

Accepted Answer

Steel

Question 22

Heating the wire decreases its resistance

Accepted Answer

False

Questions 22