WAEC Past Questions and Answers - Page 4139

The potential difference between two points A and B situated at a distance d apart is V. Which of the following expresses the magnitude of the electric field intensity between the two points assuming the field is uniform?

A point charge of 1.0 x 10^-7 C experiences force of 0.01 N in a uniform electric field. Calculate the magnitude of the strength of the field

In a purely resistive a.c. circuit, the current I = I_o sin wt and voltage, V = V_o sin wt. Calculate the instantaneous power dissipated in the circuit in time t.

The vector diagram shown below represents the resistance R, the capacitive reactance X_c, the inductive reactance X_c and the impedance, Z in an R-L-C circuit. The current in the circuit will be maximum when

In a series R - C circuit, the resistance of the resistor is 4 Ω and capacitive reactance is 3 Ω. Calculate the impedance of the circuit