Important MCQs Physics-12
Zahid E Notes
Q.1. Choose the correct option.
Statements A B C D
18 -22
The number of electrons in one coulomb 6.2x10 1.6x10 6.2x1021
1 Zero electrons
charge is equal to electrons electrons electrons
2 The photo copying process is called Xerography Inkjet Printer printing photoediting
Electric intensity due to an infinite sheet of
3 ∂/2ε∘ ∂/rε∘ ∂/r2ε∘ none of these
charge is:
Variable
4 Electric flux is a: Scalar quantity Vector quantity All of these
quantity
Electric potential at a distance ''r'' from ''q''
5 Vr = 1/54πε∘q/r2 Vr=1/4πε∘2q/r Vr=1/4πε∘2q/r Vr=1/4πε∘q2/r
is:
6 The relative permitivity of air is 79.5 1.006 1.06 1.0006
Remains
7 The "toner" of photocopier is given: Positive charge Negative charge All of above
neutral
The electric intensity at infinite distance
8 Infinite Zero Positive Negative
from the point charge is
9 Who introduced the concept of electric field Coulomb Newton Faraday Millikan
Net charge enclosed by Gaussian surface depend on Depend upon
10 zero maximum
is: intensity size of shape
Answer key
1-A 2-A 3-C 4-A 5-C 6-D 7-B 8-B 9-C 10-A
Q.1. Choose the correct option.
Statements A B C D
1 Maximum power output is I2R VI E/2R
4
The algebraic sum of potential changes for Kirchhoff’s 1st Kirchhoff’s 2nd
2 Joule’s law Fleming’s rule
a closed loop is law law
Internal resistance is the resistance offered Source of
3 The conductor The resister The circuit
by emf
The wire of resistance 3.0 Ω is stretched to
4 twice its original length. The resistance of 1.5 Ω 3.0 Ω 6.0 Ω 12 Ω
the new wire will be
5 Electrolytes conduct charges due to protons electrons ions holes
6 The unit of electromotive force is Newton Pascal Ampere Volt
7 Drift velocity of electrons is 10 m/s 10 m/s m/s 10 m/s
8 Which of the following is non Ohmic device Diode Capacitor Inductor None of these
Specific resistance of materials depend
9 Length Area Density Temperature
upon
10 For a closed circuit = > < = −
Answer key
1-D 2-B 3-A 4-C 5-C 6-D 7-C 8-A 9-D 10-B
, Q.1. Choose the correct option.
Statements A B C D
Coulomb/am
1 The unit of magnetic induction B is Coulomb Ampere Weber/m2
pere
2 NIBA = cθ θ/c c2θ c2/θ
If an electron is projected in a magnetic field
3
with velocity V, it will experience a force
4 The magnetic field inside solenoid
soleno is given: µ∘nI2 µ∘nI µ∘n/12 µ∘I/n
5 The dimensions of magnetic flux are M1L-2T1A1 MLT-2A-1 ML2T2A-1 ML2T-2A-1
To convert a galvanometer into an low value Low value by High value by
6 Reactance
ammeter, we connect with it a parallel pass resistor pass resistor
None of
7 1 tesla = 1 MAm-1 1NA-1m 1NA-1m-1
above
The vector sum of electric force and Deflecting Faraday's
8 Lorentz force Newton force
magnetic force is called: force force
Magnetic density at a point due to current Ampere’s
9 Faraday’s Law lenz’s Law Newton’s Law
carrying conductor can be e determined by Law
At the central
Outside the Inside the All over the
10 The magnetic field is uniform and stronger part of the
solenoid solenoid solenoid
solenoid
Answer key
1-D 2-A 3-B 4
4-B 5-D 6-C 7-C 8-B
B 9-A 10-C
Q.1. Choose the correct option.
Statements A B C D
Direction of
Magnitude of
1 Lenz’s law deals with emf
Direction of emf induced Resistance
current
If we make the magnetic field stronger, the Remain
2 decrease increase vanish
induced current will constant
Energy stored in an inductor is 1 1 1 1
3 L LI I I
2 2 2 2
4 Which is not present in AC generator? armature Magnet Slip rings Comutator
Mutual
5 Working principle of transformer is Self induction Farady’s law Ampere’s law
induction
Electric current produces magnetic
magneti field,
6 Faraday Oersted Henry Lenz
was suggested by
7 A.C is converted into D.C by Dynamo Rectifier Motor Transformer
8 1 Henry = VSA-1 VS-1A-1 V-1SA VSA-2
The emf induced by the motion of a
9 Motional emf Rotational emf Induced emf All of above
conductor across a magnetic field is called:
Self inductance of a long solenoid is given
10 None of these
by
Answer key
1-C 2-B 3-A 4
4-D 5-C 6-B 7-B 8-A
A 9-A 10-C
Zahid E Notes
Q.1. Choose the correct option.
Statements A B C D
18 -22
The number of electrons in one coulomb 6.2x10 1.6x10 6.2x1021
1 Zero electrons
charge is equal to electrons electrons electrons
2 The photo copying process is called Xerography Inkjet Printer printing photoediting
Electric intensity due to an infinite sheet of
3 ∂/2ε∘ ∂/rε∘ ∂/r2ε∘ none of these
charge is:
Variable
4 Electric flux is a: Scalar quantity Vector quantity All of these
quantity
Electric potential at a distance ''r'' from ''q''
5 Vr = 1/54πε∘q/r2 Vr=1/4πε∘2q/r Vr=1/4πε∘2q/r Vr=1/4πε∘q2/r
is:
6 The relative permitivity of air is 79.5 1.006 1.06 1.0006
Remains
7 The "toner" of photocopier is given: Positive charge Negative charge All of above
neutral
The electric intensity at infinite distance
8 Infinite Zero Positive Negative
from the point charge is
9 Who introduced the concept of electric field Coulomb Newton Faraday Millikan
Net charge enclosed by Gaussian surface depend on Depend upon
10 zero maximum
is: intensity size of shape
Answer key
1-A 2-A 3-C 4-A 5-C 6-D 7-B 8-B 9-C 10-A
Q.1. Choose the correct option.
Statements A B C D
1 Maximum power output is I2R VI E/2R
4
The algebraic sum of potential changes for Kirchhoff’s 1st Kirchhoff’s 2nd
2 Joule’s law Fleming’s rule
a closed loop is law law
Internal resistance is the resistance offered Source of
3 The conductor The resister The circuit
by emf
The wire of resistance 3.0 Ω is stretched to
4 twice its original length. The resistance of 1.5 Ω 3.0 Ω 6.0 Ω 12 Ω
the new wire will be
5 Electrolytes conduct charges due to protons electrons ions holes
6 The unit of electromotive force is Newton Pascal Ampere Volt
7 Drift velocity of electrons is 10 m/s 10 m/s m/s 10 m/s
8 Which of the following is non Ohmic device Diode Capacitor Inductor None of these
Specific resistance of materials depend
9 Length Area Density Temperature
upon
10 For a closed circuit = > < = −
Answer key
1-D 2-B 3-A 4-C 5-C 6-D 7-C 8-A 9-D 10-B
, Q.1. Choose the correct option.
Statements A B C D
Coulomb/am
1 The unit of magnetic induction B is Coulomb Ampere Weber/m2
pere
2 NIBA = cθ θ/c c2θ c2/θ
If an electron is projected in a magnetic field
3
with velocity V, it will experience a force
4 The magnetic field inside solenoid
soleno is given: µ∘nI2 µ∘nI µ∘n/12 µ∘I/n
5 The dimensions of magnetic flux are M1L-2T1A1 MLT-2A-1 ML2T2A-1 ML2T-2A-1
To convert a galvanometer into an low value Low value by High value by
6 Reactance
ammeter, we connect with it a parallel pass resistor pass resistor
None of
7 1 tesla = 1 MAm-1 1NA-1m 1NA-1m-1
above
The vector sum of electric force and Deflecting Faraday's
8 Lorentz force Newton force
magnetic force is called: force force
Magnetic density at a point due to current Ampere’s
9 Faraday’s Law lenz’s Law Newton’s Law
carrying conductor can be e determined by Law
At the central
Outside the Inside the All over the
10 The magnetic field is uniform and stronger part of the
solenoid solenoid solenoid
solenoid
Answer key
1-D 2-A 3-B 4
4-B 5-D 6-C 7-C 8-B
B 9-A 10-C
Q.1. Choose the correct option.
Statements A B C D
Direction of
Magnitude of
1 Lenz’s law deals with emf
Direction of emf induced Resistance
current
If we make the magnetic field stronger, the Remain
2 decrease increase vanish
induced current will constant
Energy stored in an inductor is 1 1 1 1
3 L LI I I
2 2 2 2
4 Which is not present in AC generator? armature Magnet Slip rings Comutator
Mutual
5 Working principle of transformer is Self induction Farady’s law Ampere’s law
induction
Electric current produces magnetic
magneti field,
6 Faraday Oersted Henry Lenz
was suggested by
7 A.C is converted into D.C by Dynamo Rectifier Motor Transformer
8 1 Henry = VSA-1 VS-1A-1 V-1SA VSA-2
The emf induced by the motion of a
9 Motional emf Rotational emf Induced emf All of above
conductor across a magnetic field is called:
Self inductance of a long solenoid is given
10 None of these
by
Answer key
1-C 2-B 3-A 4
4-D 5-C 6-B 7-B 8-A
A 9-A 10-C
