There are 8000 turns on the primary coil and 200 turns on the secondary coil of the is connected to a 240V mains supply. Suggest wether this transformer is a step up or step down transformer

step down transformer

Explanation:

Applying,

Vp/Vs = Np/Ns Equation 1

Where Vp = Primary voltage, Vs = secondary voltage, Np = number of turns in the primary coil, Ns = number of turns in the secondary coil

make Vs the subject of the equation

Vs = VpNs/Np Equation 2

From the question,

Given: Vp = 240 V, Np = 8000 turns, Ns = 200 turns

Substitute these values into equation 2

Vs = (240×200)/8000

Vs = 6 V.

Since,

Vp>Vs, the the transformer is a step down transformer

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.