Electricity and Energy

Question 1

Current in Series

Answer 1

Current is the same across all points in a series circuit.

Question 2

Voltage in Series

Answer 2

Voltage adds to give supply voltage

Question 3

Current in parallel

Answer 3

Current adds to give supply current

Question 4

Voltage in parallel

Answer 4

Voltage is the same across all points in a parallel circuit.

Question 5

Word equation for ohms law across a single resistor

Answer 5

Voltage across a resistor = current in resistor = resistance of resistor

Question 6

gradient formula

Answer 6

m/gradient = ΔV ÷ ΔI

Question 7

Describe power

Answer 7

Power is energy used per second

Question 8

Formulae for unit

Answer 8

V = IR, P = E/t, P = IV, Ew = Fd, Ek=1/2mv², Ep = mgh

Question 9

If a resistor with a resistance of 50 Ohms draws a current of 0.3 Amps, what will the supply voltage be?

Answer 9

V = IR
V = 0.3 x 50
V= 15V

Question 10

A resistor draws a current of 10mA from a 230V supply. What is the Resistance of the circuit? (Give answer in kΩ)

Answer 10

V = IR
230 = 0.01 R
R = 230/0.01
R = 23000Ω = 23kΩ

Question 11

Define work done energy

Answer 11

The amount of energy required to complete a task

Question 12

Define Gravitational potential Energy

Answer 12

The amount of energy gained while rising to a height

Question 13

If Resistance increases, current …?

Answer 13

decreases

Question 14

Define kinetic energy

Answer 14

E = 1/2mv²