Electricity Magnetism Past Papers Exam Questions

By Prof. Fazal Rehman Shamil
Last modified on May 21st, 2021

Guess Paper 1: Electric Machines Fall – 2020 Past Papers

Time Allowed: 3 hours

Total Marks:    70, Passing Marks (35)

Q.1 Define the following;
a) Gravitational Energy
b) Mechanical Energy
c) Electric Power
d) Resistance
e) Doping
f) Kinetic Energy
g) Ammeter

Q.2 What do you understand by torque and angular momentum for system of particles.Explain with an example.

Q. 3 Define Electric forces. If two charges of 30 micro-coulomb and 40 micro-coulomb are placed at a distance of 1 cm. Find the repulsive force between these charges.

Q. 4 Discuss the B-H loop and hysteresis in detail .

Q.5 What are semiconductors devices ? How a diode is biased? Explain both the forward and
reverse biasing.

Q.6 (a) Define work.
(b) A force of 10 N is applied on a mass of 100 Kg and displaces it at a distance of 5 meters in the direction of force making an angle of 30o. What amount of work has been done on the mass?

Q.7 Explain the Lenz’sLaw in detail.

Q.8 Write short note on any TWO of the following.
i. Mutual inductance
ii. Guass’s Law
iii. EM waves

Guess Paper 2: Electric Machines Spring- 2020 Past Papers

Time Allowed: 3 hours

Total Marks:    70, Passing Marks (35)

Q.1 Define the following;
a) Periodic Motion
b) Hertz
c) Voltage
d) Capacitance
e) Biasing
f) Intrinsic
g) Dipole

Q.2 What do you understand by transverse and longitudinal waves? Explain with an example.
Q. 3 Define Electric Flux. If two charges of 20 micro-coulomb and 40 micro-coulomb are placed at a distance of 2 cm. Find the repulsive force between these charges.

Q. 4 Discuss the Lenz’s law and derive its equation.

Q.5 What is PN junction? How a diode is biased? Explain both the forward and reverse biasing.

Q.6 (a) Define work-energy theorem.
(b) A force of 10 N is applied on a mass of 10 Kg and displaces it at a distance of 20 meters in the direction of force making an angle of 30o. What amount of work has been done on the mass?

Q.7 Explain the Newton’s 2ndLaw of rotation in detail.

Q.8 Write short note on any TWO of the following.
i. Hook’s Law
ii. BiotSavert Law
iii. Youngs double slit experiment

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