An electron moves on a straight line path XY as shown in the figure. The coil abcd is adjacent to the path of the electron. What will be the direction of current, if any, induced in the coil?

The flux linked with a coil at any instant t is given by \(\Phi\)_B = 10t² − 50t + 250. The induced emf at t = 3s is

When the current changes from +2A to −2A in 0.05 s, an emf of 8 V is induced in a coil. The co-efficient of self-induction of the coil is

The current i flowing in a coil varies with time as shown in the figure. The variation of induced emf with time would be

\(\frac{20}{\pi^2}H\)  inductor is connected to a capacitor of capacitance C. The value of C in order to impart maximum power at 50 Hz is

Transformer works on _____________.

Energy or workdone is stored in an inductor as ____________.

The generator rule is ____________.

In an a.c. dynamo, the induced current is _________ in nature.

(a) Hysteresis loss
(b) Copper loss
(c) Flux loss
(d) Power loss

(a) Inductive reactance
(b) Self Inductance
(c) Capacitive reactance
(d) resistance

State Lenz’s law.

State Fleming’s right hand rule.

Define Magnetic Flux.

A circular antenna of area 3 m² is installed at a place in Madurai. The plane of the area of antenna is inclined at 47^o with the direction of Earth’s magnetic field. If the magnitude of Earth’s field at that place is 4.1 x 10^–5 T find the magnetic flux linked with the antenna.

A circular loop of area 5 x 10^–2 m² rotates in a uniform magnetic field of 0.2T. If the loop rotates about its diameter which is perpendicular to the magnetic field as shown in figure. Find the magnetic flux linked with the loop when its plane is
(i) normal to the field
(ii) inclined 60^o to the field and
(iii) parallel to the field.

Distinguish between average & rms value of an AC.

What is Phasort and How to draw phasor diagram.

What is the phase relationship between current & voltage in an inductive? Draw
(i) Phosor diagram and
(ii) wave diagram.

How does the capacitive reactance depend on frequency? & What is the reactance of a capacitor at hertz to the study at?

What is the phase relation between current and emf in an AC circuit containing a cpacitor only? Sketch a graph showing the variation the reactance of a capacitor with frequency.

A square coil of side 30 cm with 500 turns is kept in a uniform magnetic field of 0.4 T. The plane of the coil is inclined at an angle of 30^o to the field. Calculate the magnetic flux through the coil.

A straight metal wire crosses a magnetic field of flux 4 mWb in a time 0.4 s. Find the magnitude of the emf induced in the wire.