Questions asked
Ravindra Samadiya
Numerade educator
Calculate the power used in the 2 Ω resistor in each of the following circuits: (i) a 6 V battery in series with 1 Ω and 2 Ω resistors, and (ii) a 4 V battery in parallel with 12 Ω and 2 Ω resistors.
Calculate the potential difference between the terminals of a battery if 250 joules of work is required to transfer 20 C of charge from one terminal of battery to the other?
Calculate the force required to separate the glass plates of area 10^-2m^2 with a film of water 0.05 mm thickness between them (surface tension of water = 70 × 10 ^− 3 N / m ) =70×10^-3N/m))
Calculate the electric current is drawn from the line if the supply voltage is 220 V if Two Bulbs, one rated 100 W at 220 V, and the other 60 W at 220 V, are connected in parallel to electric mains supply. ?
At 20^∘C the radius of mercury drop is 3 mm and its surface tension is 4.65 × 10 ^− 1 N/m .What is the excess of pressure inside the drop ?
An electric current of 4A flows around a circuit in 10 seconds. How much charge flows from a point in the circuit in given time? Also find the number of electrons passes in the circuit.
"An electric fan has blades of length 30 cm measured from the axis of rotation. If the fan is rotating at 120 rpm, the acceleration of a point on the tip of the blade is"
An office uses two 3 kW fires for an average of 20 hours each per week, and six 150 W lights for 30 hours each per week. If the cost of electricity is 7p per unit, determine the weekly cost of electricity to the business.
An engine is running with a velocity 44 m/s. After applying the brakes, it stops and covering a distance of 121 m. Calculate acceleration and time taken by the engine to stop
An electric heater connected to a 250 V supply fo 40 min and consumes 3.6 MJ energy. Find the power rating of the heater and the current taken from the supply.