Explore topic-wise MCQs in Physics.

This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.

1.

The 3 charges ( frac {q}{2} ), -q, ( frac {q}{2} ) are placed along the x axis at x = 0, x = r, x = 2 respectively. Find the resultant potential at a point A located at a distance y from charge q such that r << y.

A. V= ( frac {4qr^2}{4 pi varepsilon_o y} )
B. V= ( frac {qr^3}{4 pi varepsilon_o y^3} )
C. V= ( frac {qr^2}{4 pi varepsilon_o y^3} )
D. V= ( frac {qr^3}{4 pi varepsilon_o y^2} )
Answer» D. V= ( frac {qr^3}{4 pi varepsilon_o y^2} )
Discussion
2.

Electric field and electric field intensity are related to electric potential.

A. True
B. False
Answer» B. False
Discussion
3.

Two equal and opposite charges Q1 = 2 C and Q2 = -2C are placed at a distance of 6m from each other. What is the potential at the midpoint between the two charges?

A. 2 V
B. 0 V
C. 1 V
D. 3 V
Answer» C. 1 V
Discussion
4.

There are infinite number of charges, each equal to q , which are placed along the X-axis at points x = 1, x = 4, x = 16, x = 64 ..Then, determine the electric potential due to this system of charges at the point x = 0.

A. V= ( frac {16q}{3 pi varepsilon_o} )
B. V= ( frac {3q}{4 pi varepsilon_o} )
C. V= ( frac {4q}{8 pi varepsilon_o} )
D. V= ( frac {3q}{16 pi varepsilon_o} )
Answer» E.
Discussion
5.

Which is the expression for electric potential due to a system of charges from the following?

A. V= ( frac {1}{4 pi varepsilon_o} ( frac {q_1}{r_1} + frac {q_2}{r_2} + frac {q_3}{r_3} + . frac {q_n}{r_n}) )
B. V=1 4 <sub>o</sub> ( ( frac {q_1}{r_1} + frac {q_2}{r_2} + frac {q_3}{r_3} + . frac {q_n}{r_n}) )
C. V= ( frac {1}{8 pi varepsilon_o} ( frac {q_1}{r_1} + frac {q_2}{r_2} + frac {q_3}{r_3} + . frac {q_n}{r_n}) )
D. V= ( frac {1}{4 pi varepsilon_o} ( frac {q_1}{r_1} times frac {q_2}{r_2} times frac {q_3}{r_3} times . frac {q_n}{r_n}) )
Answer» B. V=1 4 <sub>o</sub> ( ( frac {q_1}{r_1} + frac {q_2}{r_2} + frac {q_3}{r_3} + . frac {q_n}{r_n}) )
Discussion