Electrical Engineering All Engineering Career

To prevent the generation of static charges on rubber or flat leather surfaces, one effective method is to use a conductive dressing. This helps to dissipate any static charges that may build up on the surface. So, the correct option is "conductive dressing is done."

A capacitance opposes the change in circuit voltage. When there is a change in voltage across a capacitor, it generates or absorbs current in order to maintain the voltage across its terminals. So, the correct option is "voltage."

A capacitor suitable for DC only is a polarized aluminum electrolytic capacitor. This type of capacitor has a specific polarity and is designed for use in DC circuits. So, the correct option is "poled aluminum electrolytic capacitor."

In general, ceramic capacitors tend to have higher capacitance values compared to mica capacitors of the same physical dimensions. Therefore, if a ceramic capacitor and a mica capacitor have the same physical dimensions, the ceramic capacitor is likely to have a higher value of capacitance. So, the correct option is "Ceramic capacitor."

The electric intensity (electric field strength) at any point in an electric field is equal to the potential gradient at that point. So, the correct option is "potential gradient."

The unit of dielectric strength is volts per meter (V/m), which represents the electric field intensity required to cause dielectric breakdown in a material. So, the correct option is "V/m."

Among the given options, electrolytic capacitors typically have the least value of breakdown voltage compared to other types such as mica, paper, and ceramic capacitors. So, the correct option is "Electrolytic."

The correct option is: 50 to 200 kV/mm.

When a dielectric slab is introduced in a parallel plate capacitor, the potential difference between the plates will decrease.

This happens because the introduction of the dielectric material increases the capacitance of the capacitor, which in turn reduces the potential difference across the plates according to the formula \( Q = CV \), where \( Q \) is the charge, \( C \) is the capacitance, and \( V \) is the potential difference. Since \( C \) increases when a dielectric is introduced, \( V \) must decrease to keep \( Q \) constant.

The ceramic capacitor will typically have a higher capacitance compared to the mica capacitor, assuming they have the same physical dimensions. Ceramic capacitors generally have higher dielectric constants compared to mica capacitors, allowing them to store more charge for the same voltage and physical size. So, the correct answer is:

Ceramic capacitor