Advertisements
Advertisements
प्रश्न
State two causes of energy loss in a transformer.
Advertisements
उत्तर
Causes of energy loss in a transformer:
1) Eddy currents developed in the core.
2) Hysteresis loss because of repeated magnetisation and demagnetisation of the iron core.
APPEARS IN
संबंधित प्रश्न
Which of the following statements correctly defines a volt?
(a) a volt is a joule per ampere.
(b) a volt is a joule per coulomb.
What is the potential difference between the terminals of a battery if 250 joules of work is required to transfer 20 coulombs of charge from one terminal of battery to the other?
A potential difference of 20 volts is applied across the ends of a resistance of 5 ohms. What current will flow in the resistance?
Calculate the potential difference between the two terminals of a battery if 100 joules of work is required to transfer 20 coulombs of charge from one terminal of the battery to the other.
Three electric cells of potential difference 1.5 V each have been connected as a battery. The potential differences of the battery will be ____________ V.
Explain why potential difference is always less than the e.m.f. of a cell?
Five resistors of different resistances are connected together as shown in the figure. A 12 V battery is connected to the arrangement.
Calculate:
(i) the total resistance in the circuit
(ii) the total current flowing in the circuit.
Potential near a charge is the measure of its ______ to bring a positive charge at that point.
State Ohm’s law.
