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Question Bank Solutions for ISC (Science) Class 12 - CISCE - Physics (Theory)

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A circular coil carrying a current I has radius R and number of turns N. If all the three, i.e. the current
I, radius R and number of turns N are doubled, then, the magnetic field at its centre becomes:

(a) Double

(b) Half

(c) Four times

(d) One fourth

[3.01] Moving Charges and Magnetism
Chapter: [3.01] Moving Charges and Magnetism
Concept: Magnetic Force

Name a material which is used in making control rods in a nuclear reactor.

[8.02] Nuclei
Chapter: [8.02] Nuclei
Concept: Atomic Masses and Composition of Nucleus

Write one balanced equation to show Emission of `beta^-` (i.e. a negative beta particle)

[8.02] Nuclei
Chapter: [8.02] Nuclei
Concept: Atomic Masses and Composition of Nucleus

An emf of 2V is induced in a coil when the current in it is changed from 0A to 10A in 0·40 sec. Find the coefficient of self-inductance of the coil.

[4.01] Electromagnetic Induction
Chapter: [4.01] Electromagnetic Induction
Concept: Electromagnetic Induction

Explain the term hysteresis

[3.01] Moving Charges and Magnetism
Chapter: [3.01] Moving Charges and Magnetism
Concept: Magnetic Force

Obtain an expression for magnetic flux density B at the centre of a circular coil of radius R, having N turns and carrying a current I

[3.01] Moving Charges and Magnetism
Chapter: [3.01] Moving Charges and Magnetism
Concept: Magnetic Force

With the help of a suitable example and an equation, explain the term pair production.

[8.02] Nuclei
Chapter: [8.02] Nuclei
Concept: Atomic Masses and Composition of Nucleus

Calculate the net emf across A and B shown in Figure 1 below :

[2] Current Electricity
Chapter: [2] Current Electricity
Concept: Electric Current

Obtain an expression for electric potential ‘V’ at a point in an end-on position i.e. axial position of the electric dipole. 

[1.02] Electrostatic Potential, Potential Energy and Capacitance
Chapter: [1.02] Electrostatic Potential, Potential Energy and Capacitance
Concept: Electric Potential

Derive the law of reflection using Huygen’s Wave Theory. 

[6.02] Wave Optics
Chapter: [6.02] Wave Optics
Concept: Huygens Principle

(i) Draw a labelled circuit diagram of a half wave rectifier and give its output waveform.

(ii) Draw a symbol for NOR gate and write its its truth table. 

[9] Electronic Devices
Chapter: [9] Electronic Devices
Concept: Materials, Devices and Simple Circuits

(i) Draw a neat circuit diagram to study the input and output characteristics of a common emitter transistor.

(ii) Draw the symbol for AND gate and write its truth table.

[9] Electronic Devices
Chapter: [9] Electronic Devices
Concept: Materials, Devices and Simple Circuits

With what type of source of light are cylindrical wave fronts associated?

[6.02] Wave Optics
Chapter: [6.02] Wave Optics
Concept: Huygens Principle

A converging lens of focal length 40 cm is kept in contact with a diverging lens of focal length 30 cm. Find the focal length of the combination .

[6.01] Ray Optics and Optical Instruments
Chapter: [6.01] Ray Optics and Optical Instruments
Concept: Reflection of Light by Spherical Mirrors

How can the spherical aberration produced by a lens be minimized? 

[6.01] Ray Optics and Optical Instruments
Chapter: [6.01] Ray Optics and Optical Instruments
Concept: Reflection of Light by Spherical Mirrors

A metallic wire having a length of 2 m and weight of 4 x 10-3 N is found to remain at rest in a uniform and transverse magnetic field of 2 x 10-4 T. Current flowing through the wire is:

[2] Current Electricity
Chapter: [2] Current Electricity
Concept: Electric Current

Two thin lenses having optical powers of -10D and+ 6D are placed in contact with each other. The focal length of the combination is: 

[6.01] Ray Optics and Optical Instruments
Chapter: [6.01] Ray Optics and Optical Instruments
Concept: Reflection of Light by Spherical Mirrors

The total energy of an electron in the ground state of the hydrogen atom is -13·6 eV. Its total energy, when a hydrogen atom is in the first excited state, is: 

[8.01] Atoms
Chapter: [8.01] Atoms
Concept: Alpha-particle Scattering and Rutherford’S Nuclear Model of Atom

Write the expression for the Lorentz force F in vector form.

[3.01] Moving Charges and Magnetism
Chapter: [3.01] Moving Charges and Magnetism
Concept: Magnetic Force

A coil has a self-inductance of 0·05 Henry. Find the magnitude of the emf induced in it when the current flowing through it is changing at the rate of 100 As-1.

[4.01] Electromagnetic Induction
Chapter: [4.01] Electromagnetic Induction
Concept: Electromagnetic Induction
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Question Bank Solutions for ISC (Science) Class 12 CISCE Physics (Theory). You can further filter Question Bank Solutions by subjects and topics. Solutions for most of the questions for CISCE can be found here on Shaalaa.com. You can use these solutions to prepare for your studies and ace in exams. Solving questions is a great way to practice and with Shaalaa.com, you can answer a question and then also check your answer with the solutions provided.
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