Question Library

A circular parallel plate capacitor with radius 6cm is separated by 0.12cm. Calculate the capacitance of the capacitor [\(\pi\) = 3.142, ε\(_0\) = 8.85 x 10\(^{-12}\)Nm\(^2\)C\(^2\)]

When capacitors are connected in series across a potential difference, there is a loss in their stored energy because:

A charge of 1.6 × 10\(^{-10}\) C is placed in a uniform electric field of intensity 2.0 × 10\(^5\) NC\(^{-1}\). What is the magnitude of the electric force exerted on the charge?

Calculate the electric potential at a distance of 20.0cm from a point charge of 0.015 C placed in air of permittivity. [ take \(\frac{1}{4\pi ε₀}\) = 9.0 x 10\(^9\)Nm\(^2\)C\(^{-2}\)]

The effective capacitance between points X and Y in the diagram above is 1.0\(\mu\) F. What is the value of the capacitance?

Find the value of a capacitor with voltage 5V and 30C.

The charge of magnitude 1.6 x 10 \(^{-19}\)C is placed in a uniform electric field of intensity 1200Vm\(^{-1}\). Calculate its acceleration, if the mass of the charge is 9.1 x 10\(^{-31}\)kg

The energy stored in the above capacitor is

Calculate the value of electric field intensity due to a charge of 4μC if the force due to the charge is 8N

Two capacitors of 0.0003μF and 0.0006μF are connected in series, find their combined capacitance.

Two isolated charged spheres each of magnitude + 1.0 x 10\(^{-6}\) C are seperated by a distance of 2.0 x 10\(^{-1}\) m. Calculate the magnitude of the electrostatic force between them [K = \(\frac{1}{4\pi \epsilon_o}\) = 9 x 10\(^9\)Nm\(^2\)C\(^{-2}\)]

In the circuit diagram above, which lamp causes the other to go off?

A capacitor described as a mica capacitor has

The terminals of a battery of emf 24.0 V and internal resistance of 1.0 Ω is connected to an external resistor 5.0 Ω. Find the terminal p.d.

A parallel plate capacitor separated by an air gap is made of \(0.8m^2\) tin plates and 20 mm apart. It is connected to 120 V battery. What is the charge on each plate? Take \(ε_o\) = \(8.85×10^-12 Fm^-1\)