Answer:
a) No-Load Current will increase
b) The magnetising reactance will increase
c) The secondary voltage will decrease
Explanation:
a) when an air ap is made in the transformer core then more current is required for the magnetisation of core. Hence, no-load current will incraese.
b) with the air gap the magnetomotive force increases. As a result, the angle between the voltage and current increases. Consequently, power factor decreases. Power factor always decreases when the reactive behaviour of circuit incraeses. Hence, Magnetisation reactance will increase.
c) Secondary voltage decreases due to air gap. Therefore, it is said that with the air gap the efficiency of the transformer decreases.
Answer:
Explanation:
Since the hoop is rolling on the floor so its total kinetic energy is given as
now for pure rolling condition we will have
also we have
now we will have
now by work energy theorem we can say
now solve for final speed
testing the model and analyzing the results of the tests
Explanation:
Answer:
The car appears to be moving 30 km/hr in the opposite direction of the bus.
Explanation: