Sum Academy Physics MCQs With Keys PDF Download. This book contains unit wise mcqs from past papers with solution. Sample papers are also included in this book.

Here are some sample multiple choice questions from sum academy physics book.

The plate areas and plate separations of five parallel plate capacitors are
capacitor I: area A, separation d
capacitor 2: area 2A, separation 2d
capacitor 3: area 2A, separation d/2
capacitor 4: area A/2, separation 2d
capacitor 5: area A, separation d/2
Rank these according ,to their capacitances, least to greatest.
A. 1, 2, 3, 4, 5
B. 5,4, 3, 2,1
C. 5, 3 and 4tie, then1, 2
D. 4, land 2 tie, then 5, 3
E. 3, 5, land 2 tie, 1, 4
If the plate separation of an isolated charged parallel-plate capacitor is doubled:
A. the electric field is doubled
B. the potential difference is halved
C. the charge on each plate is halved
D. the surface charge density on each plate is doub|id
E. none of the above
If the charge on a parallel-plate capacitor is doubled:
A. the capacitance is halved
B. the capacitance is doubled
C. the electric field is halved
D. the electric field is doubled
E. the surface charge density is not changed on either plate
A battery is used to charge a parallel combination of two identical capacitors. If the potential difference across the battery terminals is V and total charge Q flows through the battery during the charging process then the charge on the positive plate of each capacitor and the potential difference across each capacitor are:
A. Q/2 and V)2, respectively
B. Q and V , respectively
C. Q/2 and V, respectively
D. Q and V/2, respectively
E. Q and 2V , respectively
An isolated charged point particle produces an electric field with magnitude E at a point 2m away. At a point 1m from the particle the magnitude of the field is:
A. E
B. 2E
C. 4E
D. E/2
E. E/4
Two point particles, with a charges of gland q2, are placed a distance r apart. The electric field is zero at a point P between the particles on the line segment connecting them. We conclude that:
A. gland q2 must have the same magnitude and sign
B. P must be midway between the particles
C. q1 and q2 must have the same sign but may have different magnitudes
D. q1 and q2 must have equal magnitudes and opposite signs
E. q1 and q2 must have opposite signs and may have different magnitudes
A charged particle is placed in an electric field that varies with location. No force is exerted on this charge:
A. at locations where the electric field is zero
B. at locations where the electric field strength is 1/(1.6 x 10″19)N/C
C. if the particle is moving along a field line
D. if the particle is moving perpendicularly to a field line
E. if the field is caused by an equal amount of positive and negative charge
Electron traveling north enters a region where the electric field is uniform and points north. The electron:
A. speeds up
D. veers west
B. slows down
C. veers east
E. continues with the same speed in the same direction