Physics

Details

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Question What is meant by electric field electric field intensity? 2012

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Question What is an electric dipole? Find the electric strength of a dipole at any point along the dipole axis. 2012

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Question Define the flux of an electric field. Show that Coulomb’s Law can be deduced from Gauss’s Law for a spherical Gaussia surface. 2012

#### 4 What repulsive Coulomb force exist

Question What repulsive Coulomb force exists between two protons in a nucleus of iron? Assume a separation of 4.0 x 10^-5 meter. 2012

#### 5 State and explain Gauss’s Law.

Question State and explain Gauss’s Law. 2012

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Question How Coulomb’s Law can be deduced from Gauss‘s Law and considerations of symmetry? 2012

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Question Two point charges of unknown magnitude and sign are a distance d apart. The electric field strength is zero at one point between them, on the line joining them. What can you conclude about the charges? 2012

#### 8 What is the relationship between electric fie

Question What is the relationship between electric field and electric potential? 2012

#### 9 Define Magnetic field strength and flux densi

Question Define Magnetic field strength and flux density. 2012

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Question Find out the expression for magnetic force acting on a current carrying wire of certain length. 2012

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Question What is dielectric? Deduce the expression of Gauss’s Law, when a dielectric is present in the electric field. 2012

#### 12 A rectangular carbon block has dimensions

Question A rectangular carbon block has dimensions 1.0cm x 1.0cm x 50cm :(i) What is the resistance measured between the two square ends?(ii) Between two opposing rectangular faces? The resistvity of carbon at 20°C is 3.5x10^-5 Ohm-m. 2012

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Question What do you mean by hysteresis &amp; eddy current losses?

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Question What do you mean by hysteresis & eddy current losses? 2012

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Question Distinguish between diamagnetism, para magnetism and ferromagnetism. 2012

#### 16 Explain Biot-savart Law &amp; express it in v

Question Explain Biot-savart Law & express it in vector form and also state &amp; explain Ampere’s Law. 2012

#### 17 Derive the expression of torque on a recta

Question Derive the expression of torque on a rectangular current loop immersed in a uniform magnetic field. 2012

#### 18 Describe Hysteresis curve of Magnetization.

Question Describe Hysteresis curve of Magnetization. 2012

#### 19 What is represented by the area of the hysteresis loop?

Question What is represented by the area of the hysteresis loop? 2012

#### 20 A flux of 0.5 mWb is produced by a coil of 900 tums wound on a ring with a current of 3A i

Question A flux of 0.5 mWb is produced by a coil of 900 tums wound on a ring with a current of 3A in it. Calculate.(i) the inductance of the coil;(ii) the e.m.f. induced in the coil when a current of 5A is switched off, assuming the current to fall to zero in 1 millisecond; and(iii) the mutual inductance between the coils. if a second coil of 600 turns is uniformly wound over the first coil. 2012

#### 21 Define Electromotive Force and Time Constant.

Question Define Electromotive Force and Time Constant. 2012

#### 22 Find out the expression for potential due to a point charge.

Question Find out the expression for potential due to a point charge. 2012

#### 23 How the capacitance of a parallel plate capacitor can be measured?

Question How the capacitance of a parallel plate capacitor can be measured? 2012

#### 24 A long solinoid has 200 turns/cm and carries a current of 1.5 amp. its diameter is 3.0 cm.

Question A long solinoid has 200 turns/cm and carries a current of 1.5 amp. its diameter is 3.0 cm. At its center we place a 100-turn, close-packed coil if diameter 2.0 cm. This coil is arranged so that B at the centre of the solinoid is parallel to its axis. The current in the solinoid is reduced to zero and then raised to 1.5 amp in the other direction at a steady rate over a period of 0.050sec. What induced e.m.f appears in the coil while the current is being changed? 2012

#### 25 Define-(i) Charge density;(ii) Electric field strength.

Question Define-(i) Charge density;(ii) Electric field strength. 2011

#### 26 Deduce an expression of electric field intensity due to a long straight uniformly charged wire.

Question Deduce an expression of electric field intensity due to a long straight uniformly charged wire. 2011

#### 27 State and explain Coulomb‘s law.

Question State and explain Coulomb‘s law. 2011

#### 28 Calculate the electrostatic force between two x particles when at a distance of 10^-13 m from e

Question Calculate the electrostatic force between two x particles when at a distance of 10^-13 m from each other. Charge of an x particle is 3.2 x 10^-12 C. 2011

#### 29 Define dielectric constant and time constant.

Question Define dielectric constant and time constant. 2011

#### 30 Find the expression for the potential energy of

Question Find the expression for the potential energy of a dipole placed in on electric field. 2011

#### 31 Deduce an expression for torque (t) and potenti

Question Deduce an expression for torque (t) and potential energy (u) by an electric dipole placed in an uniform electric field 2011

#### 32 Define the terms current, voltage and EMF

Question Define the terms current, voltage and EMF 2011

#### 33 State and explain Ampere's law

Question State and explain Ampere's law 2011

#### 34 What is capacitance? Calculate the capacitance

Question What is capacitance? Calculate the capacitance of a parallelplate capacitor 2011

#### 35 Derive an expression for the energy stored in

Question Derive an expression for the energy stored in a charged capacitor 2011

#### 36 The parallel plates of an air-filled capacitor

Question The parallel plates of an air-filled capacitor are everywhere 1.0mm apart . What must the plate area be if the capacitance is to be 1.0 farad? 2011

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Question Define magnetic field 2011

#### 38 Calculate magnetic field along the axis of circular coil

Question Calculate magnetic field along the axis of circular coil 2011

#### 39 Explain magnetic field for a solenoid

Question Explain magnetic field for a solenoid 2011

#### 40 Define self inductance

Question Define self inductance 2011

#### 41 Find out self inductance and mutual indu

Question Find out self inductance and mutual inductance 2011

#### 42 State and explain Ohm's law

Question State and explain Ohm's law 2011

#### 43 Draw an RC circuit and explain transient r

Question Draw an RC circuit and explain transient response of the circuit 2011

#### 44 A flat strip of copper of width a and negl

Question A flat strip of copper of width a and negligible thickness carrying a current i ,find the magnetic field at a distance R from the center of the strip , at right anglesto the strip 2011

#### 45 Define Electric potential. Quantized charge.

Question Define Electric potential. Quantized charge. 2014

#### 46 Calculate E for points on the axis of the ring a distance x from its center.

Question Calculate E for points on the axis of the ring a distance x from its center. 2014

#### 47 Explain Gauss’s Law of electrostatics and deduce Columb's Law for Gauss's Law.

Question Explain Gauss’s Law of electrostatics and deduce Columb's Law for Gauss's Law. 2014

#### 48 What repulsive Coulomb force exists bemoan two protons' in a nucleus of iron? Assume a separation

Question What repulsive Coulomb force exists bemoan two protons' in a nucleus of iron? Assume a separation of 4-0 x 10^-15m. 2014

#### 49 What is an electric dipole? Find the electric field strength of a dipole at any point along the d

Question What is an electric dipole? Find the electric field strength of a dipole at any point along the dipole axis. 2014

#### 50 What is a capacitor? Define the SI. unit of capacitance.

Question What is a capacitor? Define the SI. unit of capacitance. 2014

#### 51 Draw and explain basic operation of the WheatstoneBridge

Question Draw and explain basic operation of the WheatstoneBridge Daffodil Institute of IT Diit logo.png Motto Bring international Education to You Type Private Established 1997 Chairman Md. Sabur Khan Academic staff 50 Students 1000 Address 19/1, (Dolphin 2015

#### 52 What is Hall Voltage? Explain the Hall Effect with appropriate diagram.

Question What is Hall Voltage? Explain the Hall Effect with appropriate diagram. Tejgaon College 2015

#### 53 Distinguish between diamagnetism, paramagnetism and ferromagnetism.

Question Distinguish between diamagnetism, paramagnetism and ferromagnetism. Tejgaon College 2015

#### 54 What is electric potential and potential difference? Calculate the potential due to a point charg

Question What is electric potential and potential difference? Calculate the potential due to a point charge. Tejgaon College 2015

#### 55 Explain how potential difference can be calculated from field strength.

Question Explain how potential difference can be calculated from field strength. Tejgaon College 2015

#### 56 Find the electric potential for points on the axis of a uniformly charged circular disk with surf

Question Find the electric potential for points on the axis of a uniformly charged circular disk with surface charge density Tejgaon College 2015

#### 57 What is equipotential surface?

Question What is equipotential surface? Tejgaon College 2015

#### 58 Define three electric vectors. Derive an expression relating to three electric vectors

Question Define three electric vectors. Derive an expression relating to three electric vectors Tejgaon College 2015

#### 59 Define EMF, Current density, Resistivity, Inductance

Question Define EMF, Current density, Resistivity, Inductance Tejgaon College 2015

#### 60 Let Hypothetical cylinder of radius R immersed in a uniform electric field axis being parallel to

Question Let Hypothetical cylinder of radius R immersed in a uniform electric field axis being parallel to the field. What is omega E for this close surface? Tejgaon College 2015

#### 61 Derive the transient response of an RL-circuit and define time consant.

Question Derive the transient response of an RL-circuit and define time consant. Tejgaon College 2015

#### 62 If the value of inductor of an RL circuit is 10mH then for what value of R the time consant of th

Question If the value of inductor of an RL circuit is 10mH then for what value of R the time consant of the circuit will be 1 ms? Tejgaon College 2015

#### 63 Derive the expression for the energy stored in magnetic field

Question Derive the expression for the energy stored in magnetic field Tejgaon College 2015

#### 64 What is the solenoid? Derive the expression for the value of B of a solenoid.

Question What is the solenoid? Derive the expression for the value of B of a solenoid. Tejgaon College 2015

#### 65 If a 7.0 MeV proton moves vertically downward through a field, what will be the Kinetic energy ac

Question If a 7.0 MeV proton moves vertically downward through a field, what will be the Kinetic energy act on it? Tejgaon College 2015

#### 66 State and explain Lenz's law.

Question State and explain Lenz's law. Tejgaon College 2015

#### 67 State and explain Lenz's Law.

Question State and explain Lenz's Law. Tejgaon College 2015

#### 68 What is electric dipole? Deduce an expression for torque and potential energy by electric dipole

Question What is electric dipole? Deduce an expression for torque and potential energy by electric dipole placed in a uniform electric field. Tejgaon College 2015

#### 69 Define electric dipole moment. Calculate the electric field of the dipole at point p a distance x

Question Define electric dipole moment. Calculate the electric field of the dipole at point p a distance x along the perpendicular bisector of the diople. Tejgaon College 2015

#### 70 Derive the expression for the force developed on a current carrying conductor in a magnetic field

Question Derive the expression for the force developed on a current carrying conductor in a magnetic field. Tejgaon College 2015

#### 71 Calculate the amount of torque produced on a current carrying lool placed in a magnetic field.&nb

Question Calculate the amount of torque produced on a current carrying lool placed in a magnetic field. Tejgaon College 2015

#### 72 Describe the construction of a galvanometer and describe its operation.

Question Describe the construction of a galvanometer and describe its operation. Tejgaon College 2015

#### 73 State and explain Ohm's law.

Question State and explain Ohm's law. Tejgaon College 2015

#### 74 If y=sin (m sin-1x) then show that, (1-x2)yn+2-(2n+1)xy

Question If y=sin (m sin-1x) then show that, (1-x2)yn+2-(2n+1)xyn+1 +(m2-n2)yn=0. Dhaka City College 2012

#### 75 popo

Question popo Shaikh Burhanuddin Post Graduate College 2007