Question 11
WAEC
•
2023
•
PHYSICS
•
essay
Question Parts
(
a(i)
)
Define the electric potential at a point in an electric field.
(
a(ii)
)
An uncharged body, A, was charged electrostatically by a test charge, B, using the method of induction and the method of contact. State two differences between the two methods.
(
b
)
An important precaution during an electricity experiment is to open the circuit when no leadings are being taken. Give two reasons for the stated precaution.
(
c
)
Fig. 11.0 is a circuit diagram in which a coil of inductance, \( L \), and a resistor of resistance, \( R \), are connected to a variable alternating source of frequency, \( f \).
The table shows the square of the impedance, \( Z^2 \), corresponding to each value of \( f^2 \).
\(
\begin{array}{|l|c|c|c|c|c|}
\hline
f^2/\text{Hz}^2 & 198.8 & 400.0 & 600.3 & 800.9 & 900.0 \\
\hline
Z^2/\Omega^2 & 249.6 & 400.0 & 552.3 & 702.3 & 800.0 \\
\hline
\end{array}
\)
(
ii
)
Write down the equation for Z in terms of f², R² and L². Plot a graph of Z² against f² and use it to deduce (I) L (II) R.
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About This Question
This is
Waec
2023
Physics
Question 11.
It is one of the
essay
questions from the
2023
Waec
Physics
examination.
The question covers
General
.
