Advertisements
Advertisements
Question
In a transformer, the number of turns in the primary and the secondary are 410 and 1230 respectively. If the current in primary is 6A, then that in the secondary coil is
Options
2 A
18 A
12 A
1 A
Advertisements
Solution
2 A
APPEARS IN
RELATED QUESTIONS
Write the function of a transformer.
Which coil of a step up transformer is made thicker and why?
State two ways through which the strength of an electromagnet can be increased.
State two factors on which the magnitude of induced e.m.f. depend.
How are the e.m.f in the primary and secondary coils of a transformer related with the number of turns in these coils?
State the principle of working of a transformer. Can a transformer be used to step up or step down a d.c. voltage? Justify your answer.
The power supply to the primary coil of a transformer is 200 W. Find
(i) Current in primary coil if the e.m.f. supply to it is equal to 220V.
(ii) The number of turns in the primary coil is equal to 80 and that in secondary is 800. What is the transformation ratio?
(iii) Name the type of transformer.
(iv) What will be the output voltage?
(v) What is the current in the secondary coil for an ideal transformer?
(vi) What is the output power?
(vii) Is output and input power equal?
(viii) Compare the current flowing in a secondary coil and in a primary coil.
Draw the effective equivalent circuit of the circuit shown in figure, at very high frequencies and find the effective impedance.
The magnetic flux through a coil perpendicular to its plane is varying according to the relation Φ = (5t3 + 4t2 + 2t - 5) Weber. If the resistant of the coil is 5 ohm, then the induced current through the coil at t = 2 sec will be ______.
A step down transformer connected to an AC mains supply of 220 V is made to operate at 11 V, 44 W lamp. Ignoring power losses in the transformer, what is the current in the primary circuit?
