Write two important advantages of reflecting telescope over a refracting telescope.
Concept: Optical Instruments: Telescope
Give the truth table and circuit symbol for NAND gate
Concept: Digital Electronics and Logic Gates
Identify the part of the electromagnetic spectrum which is suitable for radar system used in aircraft navigation.
Concept: Electromagnetic Spectrum
Draw the circuit diagram of a full wave rectifier. Explain its working showing its input and output waveforms.
Concept: Application of Junction Diode as a Rectifier
Draw a labelled ray diagram showing the formation of a final image by a compound microscope at least distance of distinct vision
Concept: Optical Instruments: Simple Microscope
State de Broglie hypothesis
Concept: de-Broglie Relation
Draw a labelled circuit diagram of a potentiometer to measure the internal resistance ‘r’ of a cell. Write the working formula (derivation is not required).
Concept: Potentiometer
State how a moving coil galvanometer can be converted into an ammeter.
Concept: Moving Coil Galvanometer
Derive Snell’s law on the basis of Huygen’s wave theory when the light is travelling from a denser to a rarer medium.
Concept: Snell’s Law
Find the de Broglie wavelength of electrons moving with a speed of 7 × 106 ms -1.
Concept: de-Broglie Relation
On the basis of Bohr's theory, derive an expression for the radius of the nth orbit of an electron of the hydrogen atom.
Concept: Bohr’s Model for Hydrogen Atom
What is mass defect?
Concept: Mass Defect and Binding Energy
Write one balanced equation to show Nuclear fission
Concept: Nuclear Energy > Nuclear Fusion – Energy Generation in Stars
What is the use of Zener diode?
Concept: Semiconductor Diode
A short electric dipole (which consists of two point charges, +q and -q) is placed at the centre 0 and inside a large cube (ABCDEFGH) of length L, as shown in Figure 1. The electric flux, emanating through the cube is:
a) `q"/"4piin_9L`
b) zero
c) `q"/"2piin_0L`
d) `q"/"3piin_0L`
Concept: Electric Dipole
What is meant by the term Quantization of charge?
Concept: Quantisation of Charge
Derive an expression for the intensity of electric field at a point in broadside position or on [4)
an equatorial line of an electric dipole.
Concept: Electric Dipole
A closed surface in vacuum encloses charges –q and +3q. The total electric flux emerging out of the surface is :
Concept: Applications of Gauss’s Law
Maximum torque acting on an electric dipole of moment 3×10-29 Cm in a uniform electric field E is 6 × 10-25 Nm. Find E.
Concept: Dipole in a Uniform External Field
The intensity of the electric field at a perpendicular distance of 0·5 m from an infinitely long line charge having linear charge density (λ) is 3-6 × 103 Vm-1. Find the value of λ.
Concept: Electric Field Lines
