The internal resistance of a 2.1 V cell which gives a current of 0.2 A through a resistance of 10 Ω is ______.

The emf of a battery is 3 volts and internal resistance 0.125 \(\Omega \) . The difference of potential at the terminal of battery when connected across an external resistance of 1 \(\Omega \) is ______________.

Peltier effect is the converse of _____________.

Kirchoff's II law isa consequence of conservation of________

Which one of the following is correct. According to Biot-Savart law, the magnetic induction is directly proportional to _________________.

The direction of the magnetic field due to a solenoid is given by ___________________.

The word 'Magnetism' was derived from Iron are _________

The necessary magnetic field for a low power a.c generator is produced by _________

Internal frames are _______ frames.

When an electric field is applied to an atom each of the spectral lines split into several lines. This effect is known as ________________.

What is electric power and electric energy?

What do you mean by internal resistance of a cell?

What is Seebeck effect?

Define Ampere.

What is an internal resistance of cell?

State Biot-Savart’s law.

State Ampere’s circuital law.

What is Geomagnetism?

What are Permanent magnets ? State examples

Give any one definition of power factor.

What is meant by power transmission?

What is the value of power if the circuit is
(i) purely resistive
(ii) Purely inductive or capacitive?

The motion of copper plate is damped when it is allowed to oscillate between the two poles of a magnet what is the cause of this damping?

It is possible for two lenses to produce zero power?

Define internal field emission or field ionization.

What are carbon resistors? What does the colour indicates?

Derive a relation between internal resisance and emf of a cell.

In a circuit containing internal resistance r. Find the power delivered.

Find the magnetic field due to a long straight conductor using Ampere’s circuital law.

What are the types of magnets? Give example.

Tabulate the difference between Coulomb's law and Biot-Savort's law.

Establish the fact that the relative motion between the coil and the magnet induces an emf in the coil of a closed circuit.

Find out the phase relationship between voltage and current in a pure inductive circuit.

Obtain an expression for average power of AC over a cycle. Discuss its special cases.

What is the phase difference between
(i) the voltage across L and C in an LCR circuit connected to an a.c source
(ii) applied a.c voltage and current in LCR circuit at resonance?

How does Ampere - Maxwell law expalain the flux of current trough a capacitor when it is being charged by a battery? write the expression for the displacement current in terms of the rate of change of electric flux.

What is dispersion? Obtain the equation for dispersive power of a medium.

With respect to power generation, what are the relative advantages and disadvantages of fusion type and Fission type reactors?

Obtain the equation for resolving power of optical instruments.

Draw the circuit diagram of a half-wave rectifier and explain its working.

A battery has an emf of 12 V and connected to a resistor of 3 Ω. The current in the circuit is 3.93 A. Calculate
(a) terminal voltage and the internal resistance of the battery
(b) power delivered by the battery and power delivered to the resistor

The following figure shows a complex network of conductors which can be divided into two closed loops like EACE and ABCA. Apply Kirchoff’s voltage rule(KVR)

Explain what is
(i) Thomson effect,
(ii) Positive Thomson effect,
(iii) Negative effect.

Use Kirchhoff's laws (rules) to determine the potential difference between points A and D when no current flows in the arm BE of the electric network shown in the figure below.

An electron moving perpendicular to a uniform magnetic field 0.500 T undergoes circular motion of radius 2.50 mm. What is the speed of electron?

Describe the motion of a charged particle in a uniform magnetic field.

Two air core solenoids have the same length of 80 cm and same cross-sectional area 5 cm². Find the mutual inductance between them if the number of turns in the first coil is 1200 turns and that in the second coil is 400 turns.

The solenoids S₁ and S₂ are wound on an iron-core of relative permeability 900. The areas of their cross-section and their length are the same and are 4 cm² and 0.04 m respectively. If the number of turns in S₁ is 200 and that in S₂ is 800. Calculate the mutual inductance between the solenoids. If the current in solenoid 1 is increased form 2A to 8A in 0.04 second. Calculate the induced emf in solenoid 2.

Explain the mutual induction between two long solenoids. Obtain an expression for the mutual inductance.

The current flowing in two coils of self inductance L₁ = 20mH and L₂ = 15mH are increasing at the same rate. If the power supplied to the two coils are equal. Find the ratio of
(i) induced emf
(ii) induced current and
(iii) the energies stored in the two coils at a given instant.

Show how to generalize Ampere's circuital law to include the term due to displacement current?

(i) Define the term 'intensity of radiation' in a photon picture.
(ii) Plotagraph showing the variation of photocurrent vs collector potential for three different intensities I₁ > I₂> I₃ two of which (I₁ and I₂) have the same frequency v and the third has frequency v₁ > v.
(iii) Explain the nature of the curves on the basis of Einstein's equation.

For photo electronic effect in sodium, the figure shows the plot of cut-off voltage versus frequency of incident radiation. Calculate
(i) threshold frequency
(ii) work function for sodium.

Four silicon diodes and a 10 Ω resistor are connected as shown in figure below. Each diode has a resistance of 1Ω. Find the current flows through the 10Ω resistor.

Explain current transfer characteristics.