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A sonometer wire of length 1 m is stretched by a weight of 10 kg. The fundamental frequency of vibration is 100 Hz. Determine the linear density of the material of the wire.
Concept: Study of Vibrations of Air Columns
State Wein's displacement law
Concept: Wien's Displacement Law
Draw a neat labelled diagram for Ferry's perfectly black body.
Concept: Qualitative Ideas of Black Body Radiation
Show graphical representation of energy distribution spectrum of perfectly black body.
Concept: Qualitative Ideas of Black Body Radiation
State the advantages of potentiometer over voltmeter.
Concept: Potentiometer
State any four assumptions of kinetic theory of gases.
Concept: Assumptions of Kinetic Theory of Gases
Define potential gradient of the potentiometer wire.
Concept: Potentiometer
How is potential gradient measured? Explain.
Concept: Potentiometer
Distinguish between a potentiometer and a voltmeter.
Concept: Potentiometer
A voltmeter has a resistance of 30 Ω. What will be its reading, when it is connected across a cell of emf 2 V having internal resistance 10 Ω?
Concept: Current Electricity
On what factors do the degrees of freedom depend?
Concept: Law of Equipartition of Energy
Draw a p-V diagram and explain the concept of positive and negative work. Give one example each.
Concept: Heat Engine
Four resistances 6Ω, 6Ω, 6Ω and 18Ω form a Wheatstone bridge. Find the resistance which connected across the 18Ω resistance will balance the network.
Concept: Wheatstone Bridge
Explain with a neat circuit diagram. How you will determine the unknown resistances using a meter bridge.
Concept: Wheatstone Bridge
A cell of e.m.f 1.5V and negligible internal resistance is connected in series with a potential meter of length 10 m and the total resistance of 20 Ω. What resistance should be introduced in the resistance box such that the potential drop across the potentiometer is one microvolt per cm of the wire?
Concept: Potentiometer
Which one of the following particles cannot be accelerated by a cyclotron?
(A) Electrons
(B) Protons
(C) Deuterons
(D) α- particles
Concept: Cyclotron
Currents of equal magnitude pass through two long parallel wires having a separation of 1.35 cm. If the force per unit length on each of the wires is 4.76 x 10-2 N, what must be I ?
Concept: Magnetic Field Produced by a Current in a Circular Arc of a Wire
A circular loop of radius 9.7 cm carries a current 2.3 A. Obtain the magnitude of the magnetic field
(a) at the centre of the loop
(b) at a distance of 9.7 cm from the centre of the loop but on the axis.
Concept: Magnetic Lines for a Current Loop
The magnetic field at a distance of 2.4 cm from a long straight [current-carrying] wire is 16 µT. What is the current through the wire?
Concept: Magnetic Field Produced by a Current in a Circular Arc of a Wire
Derive the expression for magnetic field produced by a current in a circular arc of wire.
Concept: Magnetic Field Produced by a Current in a Circular Arc of a Wire
