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Physics Important Questions Class 12 State Board. We covered all the Physics Important Questions Class 12 State Board in this post for free so that you can practice well for the exam.
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Physics Important Questions Class 12 State Board mcqs for Students
A charge of −10 C is brought from infinity to a point in an electrostatic field, and 10 J of work is done in the process. What is the electric potential at that point?
a) 100 V
b) −10 V
c) −1 V
d) 1 V
Option c – −1 V
Two particles A and B carry charges +Q and +16Q respectively, each having the same Mass m. If both are released from rest through the same potential difference, what is the ratio of their speeds VA:VB?
a) 16 : 1
b) 1 : 16
c) 1 : 4
d) 4 : 1
Option c – 1 : 4
A point charge of 60 μC is placed in air. What is the potential difference between two points located at distances of 20 cm and 40 cm from the charge?
a) 2 kV
b) 1.35 kV
c) 270 kV
d) 1.35 MV
Option d – 1.35 MV
Two charges of +20 μC and −10 μC are separated by 40 cm in air. What is the electric potential at the midpoint of the line joining them?
a) 10 MV
b) 20 MV
c) 450 kV
d) 450 MV
Option c – 450 kV
If 100 J of work is required to move a charge of 5 C from a point at −10 V to another point at potential V, what is the value of V?
a) 15 V
b) 10 V
c) −10 V
d) 25 V
Option b – 10 V
In a certain Electric Field configuration, all points of zero potential lie on a circular boundary S. Inside S the potential is positive, while outside S it is negative. A free positive charge is placed inside S. What will happen?
a) It may move but eventually return to its starting point
b) It will stay in equilibrium
c) It can move only inside S and never cross S
d) It will cross S at some stage
Option d – It will cross S at some stage
A charge of 5 C is displaced by 0.5 m, and the work done during this displacement is 20 J. What is the potential difference between the two points?
a) 5 V
b) 2 V
c) 4 V
d) 1 V
Option c – 4 V
A metallic sphere of radius 5 cm is maintained at a potential of 100 V. What is the magnitude of the Electric Field at its surface?
a) 1000 V/m
b) 5000 V/m
c) 2500 V/m
d) 2000 V/m
Option d – 2000 V/m
In the Electric Field of a point charge, the field strength at a certain point is 30 V/m in a medium with dielectric constant 4. If the electric potential at that point is 120 V, what is the magnitude of the charge?
a) 213 pC
b) 213 nC
c) 213 μC
d) 214 mC
Option b – 213 nC
We covered all the Physics important Questions Class 12 State Board above in this post for free so that you can practice well for the exam.
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Also, check out:
- ISC Class 12 Physics Chapter Wise Questions with Solutions
- Previous Year Question Paper of Class 12 Bihar Board Physics
- Physics Chapter wise Weightage Class 12 HSC
