Physics: Electricity

Question 1

Power (Watts)

Answer 1

Power = V\*I
Power = I<sup>2</sup> \* R

V= Voltage (Volts)

I= Current (Amps)

R= Resistance (Ohms)

Question 2

Ohm’s Law

Answer 2

V= I * R

V= Voltage (Volts)

I= Current (Amps)

R= Resistance (Ohms)

Question 3

Charge (Coulombs)

Answer 3

Q = I*t

Q= Coulombs

I= Current

t= Time in seconds

Question 4

Capacitance (Farads)

Answer 4

Capacitance (Farads)= Q/V

Q= Charge (coulombs)

V= Voltage

Question 5

Stored Energy (Defibrillator)

Answer 5

Stored Energy= ½ CV²

Stored Energy= ½ QV

C= Capacitance (Farads)

V= Volts

Q= Charge (Coulombs)

Question 6

Resistors in series

Answer 6

Rt= R1 + R2 + R3…

Question 7

Resistors in Parallel

Answer 7

1/Rt= 1/R1 + 1/R2 + 1/R3…

Question 8

Wheatstone Bridge

Answer 8

R1/R2 = R3/ R4

Question 9

Doppler Equation

Answer 9

Velocity = c*^f/2f

c= speed of sound wave

^f= change of frequency

f= emitted frequeny