1: A Moving car will produce
a. Electric field
b. Magnetic field
c. Both
d. No field
2: Current is flowing in two long parallel conductors in the same direction. The conductors … each other
a. Are inclined to
b. Repel
c. Attract
d. Neither attract nor repel
3: Cathode rays enter in a uniform magnetic field perpendicular to direction of field. In magnetic field their path will be
a. Circle
b. Parabolic
c. Straight line
d. Elliptical
4: The force experienced by a charged particle in magnetic field is maximum when particle move in a direction
a. Perpendicular to
b. Parallel to
c. Is at rest
d. None of these
5: A particle moving in a magnetic field has an increase in its velocity then the radius of circle
a. Becomes half
b. Increase
c. Decrease
d. Remains same
6: If relative permeability of a substance is 0.79, then it is …. Material
a. Diamagnetic
b. Paramagnetic
c. Ferromagnetic
d. None of these
7: An electron enters a magnetic field acting vertically downward with a velocity v from east. The electron is deflected along
a. South
b. North
c. Southeast
d. Northeast
8: A charged particle moves through a magnetic field in a direction perpendicular to it. Then … remains unchanged
a. Direction
b. Speed
c. Velocity
d. Acceleration
9: Magnetic dipole moment is defined as
a. $\mu=\frac{I}{A}$
b. $\mu=\frac{A}{I}$
c. $\mathbf{\mu}=\mathbf{IA}$
d. None of these
10: Which define the relation between magnetic torque an magnetic dipole moment
a. $\vec{\mathbf{\tau}}=\vec{\mathbf{\mu}}\times\vec{\mathbf{B}}$
b. $\vec{\tau}=\vec{\mu}\cdot\vec{B}$
c. $\vec{\tau}=-\vec{\mu}\cdot\vec{B}$
d. None of these
11: Which of the following parameter is used to assess the magnetic ability of material?
a. Susceptibility
b. Magnetization
c. Magnetic flux
d. All
12: For a diamagnetic material, which of the following statement is correct?
a. $\mu_r>2$
b. $\mathbf{\mu}_\mathbf{r}<\mathbf{1}$
c. $\mu_r>1$
d. $\mu_r=10$
3: With an increase in the area of hysteresis curve, Power loss will?
a. Increase
b. Decrease
c. First increase and then decrease
d. None
14: For a paramagnetic material, which of the following statement is correct?
a. $\mu_r>2$
b. $\mu_r<1$
c. $\mathbf{\mu_r>1}$
d. $\mu_r=10$
15: The unit of relative permeability is
a. Henry/meter
b. Henry
c. Henry/sq.m
d. It is dimensionless
16: The magnetic field intensity of an infinite sheet of charge with charge density 36.5 units in air will be
a. 18.25
b. 11.25
c. 73
d. 1/36.5
17: For time varying current, the field or waves will be
a. Electrostatic
b. Electrical
c. Electromagnetic
d. All
18: Lenz law devised a rule to find out the direction of
a. Current induced in circuit
b. Electromagnetic difference
c. Potential difference
d. Flow of power in fuse
19: What is the SI unit of mutual inductance
a. Ohm
b. Henry
c. Volt
d. Siemens
20: If we increase the current in an inductor, self-inductance of the inductor will
a. Decrease
b. Increase
c. Remains same
d. First decrees, and then increase
21: Which of the following is expression for Lorentz force
a. $qE$
b. $q(V\times B)$
c. $ma+qE$
d. $\mathbf{qE}+\mathbf{q}\left(\mathbf{V}\times\mathbf{B}\right)$
22: In a vacuum or free space what observations are made?
a. $\rho=\rho_\circ,\ \ \ J=0$
b. $\rho=0,\ \ \ J=J_\circ$
c. $\mathbf{\rho}=\mathbf{0},\ \ \ \mathbf{J}=\mathbf{0}$
d. None
23: Which of the following laws, do not form Maxwell equation
a. Plank’s law
b. Gauss’s law
c. Faraday’s law
d. Ampere’s law
24: The divergence of which quantity will be zero
a. $\vec{E}$
b. $\vec{D}$
c. $\vec{\mathbf{B}}$
d. $\vec{H}$
25: Find the Maxwell’s equation derived from Faraday’s law
a. $Div\left(H\right)=J$
b. $Div\left(D\right)=I$
c. $\mathbf{curl(E=-\frac{dB}{dt}}$
d. None
26: Find the Maxwell’s equation derived from Ampere’s law
a. $Div\left(I\right)=H$
b. $Div\left(H\right)=J$
c. $\mathbf{curl}\left(\mathbf{H}\right)=\mathbf{J}$
d. $curl\left(B\right)=D$
27: The Faraday’s law states about which type of EMF
a. Transformer EMF
b. Back EMF
c. Both “a” and “b”
d. None
28: In which of the following forms, can Maxwell’s equation not be represented?
a. Static
b. Differential
c. Integral
d. Harmonic
29: In metal which of the following equation will hold good
a. $\mathbf{curl}\left(\mathbf{H}\right)=\mathbf{J}$
b. $curl\left(J\right)=\frac{dD}{dt}$
c. $curl\left(H\right)=D$
d. All
30: The charge build up in the capacitor is due to which quantity
a. Conduction current
b. Displacement current
c. Conversion current
d. Direct current
31: The Maxwell second equation that is valid in any conductor is
a. $\mathbf{curl}\left(\mathbf{H}\right)=\mathbf{Jc}$
b. $curl\left(E\right)=Jc$
c. $curl\left(E\right)=Jd$
d. $curl\left(H\right)=Jd$
32: Maxwell’s equation relates to
a. Law of gravitation
b. Basic law of electromagnetism
c. Laws of electrostatic
d. All
33: Which of the following does not represent the Maxwell’s equation
a. $\oint{\vec{\mathbf{E}}\cdot\mathbf{d}\vec{\mathbf{A}}}=\frac{\mathbf{q}}{\mathbf{\epsilon}_\circ}$
b. $\oint{\vec{B}\cdot d\vec{A}}=0$
c. $\oint{\vec{E}\cdot d\vec{L}}=-\frac{d\vec{B}}{dt}$
d. None
34: Polarization of light establishes that, light has
a. Wave nature
b. particle nature
c. Transverse nature
d. All
35: Electromagnetic waves are produced by
a. A static charge
b. An accelerated charge
c. A moving charge
d. Charged particle
36: The direction in which electromagnetic waves propagate is the same as that of
a. $\vec{\mathbf{E}}\times\vec{\mathbf{B}}$
b. $\vec{B}\times\vec{E}$
c. $\vec{E}$
d. $\vec{B}$
37: In EM waves, the phase difference between electric field and magnetic field vector is
a. Zero
b. $\frac{\mathbf{\pi}}{\mathbf{2}}$
c. π
d. $\frac{\pi}{3}$
38: Monochromatic plane wave is also termed as
a. Harmonic plane
b. Dichromatic plane
c. Both “a” and “b”
d. None
39: Monochromatic plane has always
a. Variable frequency
b. Constant frequency
c. Infinite frequency
d. Zero frequency
40: A plane wave in free space has an average poyonting vector of 1wm-2. The average energy density is
a. $1.0\ nj/m^3$
b. $3.3\ nj/m^3$
c. $\mathbf{2}\ \mathbf{nj}/\mathbf{m}^\mathbf{3}$
d. $4.4\ nj/m^3$
41: Collective dipole moment per unit volume is
a. Susceptibility
b. Permeability
c. Polarization
d. Unpolarization
42: In oscillating electron model frictional force is proportional to
a. Displacement
b. Velocity
c. Acceleration
d. None
43: Beyond resonance, however, when $\omega\gg\omega_\circ$, ![]()
and E have …. Signs
a. Positive
b. Negative
c. Same
d. Opposite
44: In homogenous dielectric, the internal charge density is
a. One
b. Infinite
c. Zero
d. Cannot predict
45: Which oscillations are more important in determining refractive index
a. Ionic
b. Electronic
c. Zero
d. Infinite
46: The region in which nR decreases with frequency is the region of …. Dispersion
a. Normal
b. Anomalous
c. Zero
d. Infinite
47: To determine oscillator strength for a given transition, require the application of.
a. Classical Theory
b. Electromagnetic Theory
c. Quantum Theory
d. Electronic Theory
48: Chauchy’s relations are used to describe
a. Normal dispersion
b. Anomalous dispersion
c. Polarization
d. Reflection
49: The plasma frequency depends upon
a. Velocity
b. Temperature
c. Size of particle
d. Colour of particles
50: Which phenomena could not be explained by classical free electron theory?
a. Photoelectric effect
b. Compton effect
c. Black body radiation
d. None of above
51: If speed of light were infinity instead of ![]()
then moving mass will become
a. $\infty$
b. $2m_\circ$
c. $\mathbf{m}_\circ$
d. Zero
52: A frame of reference which remains at rest or moves with uniform velocity is called
a. Uniform frame
b. Variable frame
c. Inertial frame
d. Non-inertial frame
53: According to special theory of relativity, the law of physics are same in all
a. Inertial frame
b. Non-inertial frame
c. Accelerated frame
d. All of these
54: Two photons recede from each other. Their relative velocity will be
a. 2C
b. C
c. Zero
d. C/2
55: Decay of ![]()
-messon supports
a. Length contraction
b. Time dilation
c. Relativity of mass
d. Simultaneity
56: The postulate of special theory of relativity are applicable to
a. Stationary frame
b. Accelerated frame
c. Inertial frame
d. All of above
57: The statement “all inertial frames are equivalent” is called principal of
a. Inertia
b. Relative motion
c. Equivalence
d. Correspondence
58: Velocity of light in free space
a. $\sqrt{\epsilon_\circ\mu_\circ}$
b. $\frac{\mathbf{1}}{\sqrt{\mathbf{\epsilon}\circ\mathbf{\mu}\circ}}$
c. $\sqrt{\frac{\epsilon_\circ}{\mu_\circ}}$
d. None of these
59: Which of the following relation is valid in special theory of relativity
a. $\vec{P}=m\vec{v}$
b. $\vec{F}=m\vec{a}$
c. $\vec{F}\cdot t=\Delta\vec{P}$
d. $\vec{\mathbf{F}}=\frac{\mathbf{d}\vec{\mathbf{P}}}{\mathbf{dt}}$
60: Special theory of relativity deals with the events in the frame of reference which moves with constant
a. Velocity
b. Acceleration
c. Time interval
d. Momentum
