Get premium membership and access questions with answers, video lessons as well as revision papers.
- What is the magnitude of a point charge whose electric field 50 cm away has a magnitude of 2.0 N/C?(Solved)
What is the magnitude of a point charge whose electric field 50 cm away has a magnitude of 2.0 N/C?
Date posted: May 11, 2021. Answers (1)
- The nucleus in an atom has a radius of about 4.0 x 1-15 m and contains 26 protons. What is the
magnitude of the repulsive electrostatic...(Solved)
The nucleus in an atom has a radius of about 4.0 x 1-15 m and contains 26 protons. What is the
magnitude of the repulsive electrostatic force between two of the protons that are separated by
4.0 x 10-15m?
Date posted: May 11, 2021. Answers (1)
- Three point charges lie along the x axis as shown in figure 2.2. The positive charge q1 =15.0µC is
at x = 2.00 m, the positive...(Solved)
Three point charges lie along the x axis as shown in figure 2.2. The positive charge q1 =15.0μC is
at x = 2.00 m, the positive charge q2 = 6.00 μC is at the origin, and the resultant force acting on
q3 is zero. What is the x coordinate of q3?
Date posted: May 11, 2021. Answers (1)
- Consider three point charges located at the corners of a right triangle as shown in figure 2.1, where q1= q3 = 5.0 µC, q2 =...(Solved)
Consider three point charges located at the corners of a right triangle as shown in figure 2.1, where q1= q3 = 5.0 μC, q2 = -2.0 μC and a = 0.10 m. Find the resultant force exerted on q3.
Date posted: May 11, 2021. Answers (1)
- A tiny sphere has an initial charge of Q. A portion q is transferred to a second, nearby sphere.
For what value of q/Q will the...(Solved)
A tiny sphere has an initial charge of Q. A portion q is transferred to a second, nearby sphere.
For what value of q/Q will the electrostatic force between the two spheres be maximized?
Date posted: May 11, 2021. Answers (1)
- What is the distance between point charge q1 = 26.0 µC and a point charge q2 = -47.0 µC such that the electrostatic force between...(Solved)
What is the distance between point charge q1 = 26.0 μC and a point charge q2 = -47.0 μC such that the electrostatic force between them has a magnitude of 5.7 N?
Date posted: May 11, 2021. Answers (1)
- The electron and proton of a hydrogen atom are separated (on the average) by a distance of approximately 5.3 x 10-11 m. Find the magnitudes...(Solved)
The electron and proton of a hydrogen atom are separated (on the average) by a distance of approximately 5.3 x 10-11 m. Find the magnitudes of the electric force between the two particles.
Date posted: May 11, 2021. Answers (1)
- How much charge is represented by 4,600 electrons?(Solved)
How much charge is represented by 4,600 electrons?
Date posted: May 11, 2021. Answers (1)
- Find the currents l1, l2, and l3 in the circuit shown in figure below.(Solved)
Find the currents l1, l2, and l3 in the circuit shown in figure below.
Date posted: May 11, 2021. Answers (1)
- Find the current I in the circuit of the figure below.(Solved)
Find the current I in the circuit of the figure below.
Date posted: May 11, 2021. Answers (1)
- State Kirchhoff’s Laws, and for each present the sign convention.(Solved)
State Kirchhoff’s Laws, and for each present the sign convention.
Date posted: May 11, 2021. Answers (1)
- A galvanometer with an internal resistance of 5O has a maximum scale deflection when a
current of 20 mA is flowing through it. Explain showing all...(Solved)
A galvanometer with an internal resistance of 5Ω has a maximum scale deflection when a
current of 20 mA is flowing through it. Explain showing all your calculation how you can
convert it into:
(a) A voltmeter with full scale deflection of 15V.
(b) An ammeter with a full scale deflection of 10A.
Date posted: May 11, 2021. Answers (1)
- The terminal p.d of a battery is 12 V when an external resistance of 20 O is connected and 13.5 V when an external resistance...(Solved)
The terminal p.d of a battery is 12 V when an external resistance of 20 Ω is connected and 13.5 V when an external resistance of 45 Ω is connected. Calculate the emf and internal resistance of the battery.
Date posted: May 11, 2021. Answers (1)
- A battery of emf 40 V and internal resistance 5 O is connected to a resistance of 15 O.
Calculate the terminal p.d(Solved)
A battery of emf 40 V and internal resistance 5 Ω is connected to a resistance of 15 Ω.
Calculate the terminal p.d.
Date posted: May 11, 2021. Answers (1)
- A cell of unknown emf E and internal resistance 2 O is connected to a 5 O resistance. If the terminal p.d V is 1.0...(Solved)
A cell of unknown emf E and internal resistance 2 Ω is connected to a 5 Ω resistance. If the terminal p.d V is 1.0 V, calculate E.
Date posted: May 11, 2021. Answers (1)
- Explain the difference between load resistance in a circuit and internal resistance in a battery.(Solved)
Explain the difference between load resistance in a circuit and internal resistance in a battery.
Date posted: May 11, 2021. Answers (1)
- Four resistors are connected as shown in figure below.
(a) Find the equivalent resistance between points a and c.
(b) What is the current in each resistor...(Solved)
Four resistors are connected as shown in figure below.
(a) Find the equivalent resistance between points a and c.
(b) What is the current in each resistor if a potential difference of 42 V is maintained between a and c ?
Date posted: May 11, 2021. Answers (1)
- Consider five resistors connected as shown in figure below. Find the equivalent resistance between points a and b.(Solved)
Consider five resistors connected as shown in figure below. Find the equivalent resistance between points a and b.
Date posted: May 11, 2021. Answers (1)
- A steel wire of cross-sectional area of 25cm2 and resistivity of 1.0 x 10-7Om. Evaluate the
resistance of 1m of the wire.(Solved)
A steel wire of cross-sectional area of 25cm2 and resistivity of 1.0 x 10-7Ωm. Evaluate the
resistance of 1m of the wire.
Date posted: May 11, 2021. Answers (1)
- What is the relationship between resistance and resistivity?(Solved)
What is the relationship between resistance and resistivity?
Date posted: May 11, 2021. Answers (1)