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Previous Year Questions

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Board, class, subject, chapter, year-wise PYQ. Practice effectively and ace your board exams.

4,686 Questions
CBSE
#1 Class Class 12 Physics Current Electricity 2019 Mcq 1M
The algebraic sum of all currents meeting at a point in an electrical circuit is
A. zero
B. infinite
C. positive
D. negative
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CBSE
#2 Class Class 12 Physics Current Electricity 2021 Mcq 1M
If voltage across a lamp increases by 2%, then the increase in its power will be
A. 1%
B. 2%
C. 3%
D. 4%
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CBSE
#3 Class Class 12 Physics Current Electricity 2018 Mcq 1M
Electron-volt (eV) is the measure of
A. charge
B. potential difference
C. current
D. energy
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CBSE
#4 Class Class 12 Physics Current Electricity 2017 Mcq 1M
Wheatstone's bridge is used in measuring
A. High resistance
B. Low resistance
C. Both high and low resistance
D. Potential difference
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CBSE
#5 Class Class 12 Physics Current Electricity 2020 Mcq 1M
A steady current flows in a metallic conductor of non-uniform cross-section. Which of the following quantities is constant along the conductor?
A. current
B. drift speed
C. current density
D. none of these
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CBSE
#6 Class Class 12 Physics Current Electricity 2019 Mcq 1M
The net charge on a current carrying conductor is
A. zero
B. constant
C. varying
D. negative
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CBSE
#7 Class Class 12 Physics Current Electricity 2018 Mcq 1M
Kilowatt-hour (kWh) is the unit of
A. energy
B. power
C. torque
D. force
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CBSE
#8 Class Class 12 Physics Current Electricity 2017 Mcq 1M
Beams of electrons and protons move parallel to each other in the same direction. They
A. attract each other
B. repel each other
C. neither attract nor repel
D. force depends upon speed of beams
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CBSE
#9 Class Class 12 Physics Current Electricity 2018 Mcq 1M
Pieces of copper and silicon are initially at room temperature. Both are heated to temperature $T$. The conductivity of
A. both increases
B. both decreases
C. copper increases and silicon decreases
D. copper decreases and silicon increases
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CBSE
#10 Class Class 12 Physics Current Electricity 2019 Short 2M
A cell of emf $E$ is connected across an external resistance $R$. When current $I$ is drawn from the cell, the potential difference across the electrodes drops to $V$. Write the expression for the internal resistance ...
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CBSE
#11 Class Class 12 Physics Current Electricity 2020 Mcq 1M
A current of 0.8 A flows in a conductor of 40 $\Omega$ for 1 minute. The heat produced in the conductor will be
A. 1445 J
B. 1536 J
C. 1569 J
D. 1640 J
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CBSE
#12 Class Class 12 Physics Electrostatic Potential and Capacitance 2023 Short 5M
Twenty seven spherical drops of radius 3 mm and carrying 10⁻¹² C of charge each are combined to form a single drop. Find the capacitance and potential of the bigger drop.
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CBSE
#13 Class Class 12 Physics Electrostatic Potential and Capacitance 2024 Short 5M
An electric dipole of length 2 cm is placed with its axis making 30° to a uniform electric field of 10⁵ N/C. It experiences a torque of 10√3 N·m. Find (i) magnitude of charge on dipole and (ii) potential energy of the...
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CBSE
#14 Class Class 12 Physics Electrostatic Potential and Capacitance 2020 Mcq 1M
A point charge +q is placed at origin O. Work done in taking another point charge −Q from point A (0, a) to point B (a, 0) along straight path AB is
A. Zero
B. kqQ/a²
C. −kqQ/a
D. kqQ/a
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CBSE
#15 Class Class 12 Physics Electrostatic Potential and Capacitance 2021 Short 3M
Calculate the voltage needed to balance an oil drop carrying 10 electrons, between capacitor plates 5 mm apart. Mass = 3×10⁻¹⁶ kg, e = 1.6×10⁻¹⁹ C, g = 9.8 m/s².
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CBSE
#16 Class Class 12 Physics Electrostatic Potential and Capacitance 2023 Short 3M
An electric field E = 50î + 75ĵ N/C exists in a region. Presuming potential at origin to be zero, find the potential at point P(1 m, 2 m).
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CBSE
#17 Class Class 12 Physics Electrostatic Potential and Capacitance 2022 Short 3M
A short electric dipole has dipole moment 16×10⁻⁹ C·m. Find the electric potential at a point 0.6 m from centre, on a line making 60° with the dipole axis.
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CBSE
#18 Class Class 12 Physics Electrostatic Potential and Capacitance 2023 Short 5M
Derive the expression for the electric potential due to an electric dipole at an axial point.
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CBSE
#19 Class Class 12 Physics Electrostatic Potential and Capacitance 2022 Short 3M
Calculate the potential at the centre of a square ABCD of each side √2 m due to charges 2, −2, −3 and 6 µC at the four corners.
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CBSE
#20 Class Class 12 Physics Electrostatic Potential and Capacitance 2021 Short 3M
(A) Calculate the potential at point P due to charge 4×10⁻⁷ C located 9 cm away. (B) Obtain the work done in bringing charge 2×10⁻⁹ C from infinity to point P. Does the answer depend on the path?
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