During Short circuiting, the current flowing in the electrical circuit
The electric field inside a perfectly conducting hollow object is
Two conducting wires A and B are made of same material. If the length of B is twice that of A and the radius of circular cross-section of A is twice that of B, then their resistances RA and RB are in the ratio
Which one of the following circuit elements is an active component?
If two conducting spheres are separately charged and then brought in contact
When you pull out the plug connected to an electrical appliance, you often observe a spark. To which property of the appliance is this related?
Two resistors of resistance 2 Ω and 4 Ω when connected to a battery will have
An electric kettle consumes 1 kW of electric power when operated at 220 V. A fuse wire of what rating must be used for it?
In an electrical circuit two resistors of 2 Ω and 4 Ω respectively are connected in series to a 6 V battery. The heat dissipated by the 4 Ω resistor in 5 s will be
In an electrical circuit three incandescent bulbs A, B and C of rating 40 W, 60 W and 100 W respectively are connected in parallel to an electric source. Which of the following is likely to happen regarding their brightness?
If the current I through a resistor is increased by 100% (assume that temperature remains unchanged), the increase in power dissipated will be
A cylindrical conductor of length l and uniform area of cross-section A has resistance R. Another conductor of length 2l and resistance R of the same material has area of cross section
What is the maximum resistance which can be made using five resistors each of 1/5 Ω?
A current of 1 A is drawn by a filament of an electric bulb. Number of electrons passing through a cross section of the filament in 16 seconds would be roughly
Electrical resistivity of a given metallic wire depends upon
In the following circuits, heat produced in the resistor or combination of resistors connected to a 12 V battery will be
In an electric bulb, light is produced due to the glowing of