Electric Circuits Answers

A triode passes a plate current of 5mA at plate voltage 150V and grid voltage of -2V. If the grid voltage is changed to -35V, the plate current drops to 3.2mA but can be restored to 5mA by increasing plate voltage to 195V. Calculate

(1) mutual conductance

(2) a.c. plate resistance

(3) amplification factor

1.The equivalent resistance of two resistors Ri and Rz connected in parallel is given Rey = If R, = 100.0 +5% and R = 47.0 + 5%, find the expected maximum and minimum value of their equivalent resistance when they are connected in parallel.

2. A particle moves in a straight line such that its displacement, x meters, from a fixed point on the line at time t seconds is given by x = 40[e-2t - e-4]. (a) Find the time when the particle is instantaneously at rest. (b) Find the displacement of the particle from O when t = 3 s. (c) Find the total distance travelled during the first 3 seconds of its

1.The equivalent resistance of two resistors Ri and Rz connected in parallel is given Rey = If R, = 100.0 +5% and R = 47.0 + 5%, find the expected maximum and minimum value of their equivalent resistance when they are connected in parallel.

2. A particle moves in a straight line such that its displacement, x meters, from a fixed point on the line at time t seconds is given by x = 40[e-2t - e-4]. (a) Find the time when the particle is instantaneously at rest. (b) Find the displacement of the particle from O when t = 3 s. (c) Find the total distance travelled during the first 3 seconds of its

A uniform electric field of magnitude E = 38 N/C points along the x-axis. A circular loop of radius R = 26 cm is centered at the origin with the normal to the loop pointing θ = 45 degrees above the x-axis.

Calculate the electric flux in units of N⋅m2/C that passes through the loop.

Three point charges are located it the positive x-axis of a coordinate system. Positive point charge 𝒒𝟏 = 5 𝑛𝐶 and negative point charge 𝒒𝟐 = −10 𝑛𝐶, are located 3 cm and 5 cm from the origin respectively. Determine the total force of another point charge 𝑸 = −𝟏 𝝁𝑪 at the origin due to the other two chargers.

A battery of e.m.f 12V supplies a current of 50 A for 2 minutes. How much energy is supplied in this time

Four 15-V cells are connected in a (a) series and (b) parallel. For each case, find the total voltage (V_T). Suppose you divide the cells into two groups, each group consisting of two series cells. Then you connect these two groups parallel to each other. Also find the total voltage.

Two charges q1 = 4microC and q2 = -7 microC by 3.5m and 1.5m. Calculate the electric potential at point B having a distance of 2m.

An electric dipole consists of two equal but unlike charges separated by a distance. Two point charges, q1 = +4.5 x 10-6 C and q2 = -4.5 x 10-6 C, are separated by 6.4 x 10-2 m, forming an electric dipole as shown in the figure. Find the electric field halfway between the dipole.

Calculate the capacitance of two plates area 4cm² seperated by 1mm