Physics Test 124

A dielectric slab is inserted between the plates of an isolated capacitor. The force between the plates will

Two metal spheres of capacitances  C₁ & C₂ carry some charges. They are put in contact and then separated. The final charges  Q₁ & Q₂ on them will satisfy

A dielectric slab is inserted between the plates of an isolated charged capacitor. Which of the following quantities will remain the same?

A parallel-plate capacitor is connected to a battery. A metal sheet of negligible thickness is placed between the plates. The sheet remains parallel to the plates of the capacitor

A uniform wire of resistance 50 Ω is cut into 5 equal parts. These parts are now connected in parallel. The equivalent resistance of the combination is

The net resistance of an ammeter should be small to ensure that

Consider a capacitor charging circuit. Let Q₁ be the charge given to the capacitor in a time interval of 10 ms and  Q₂ be the charge given in the next time interval of of 10 ms. Let 10 μC charge be deposited in a time interval t₁ and the next 10 μC charge is deposited in the next time interval t₂. Then,

Which one of the following quantities do not change when a resistor connected to a battery is heated due to the current ?

The equivalent capacitance between the points A and B of five identical capacitors each of capacity C, will be

Four condensers each of capacity 4mF are connected as shown in the figure. If VP - VQ = 15 V the energy stored in the system is