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Three 60 W (120 V) light bulbs are connected across a 120 V power line shown in figure. Find (a) the voltage across each bulb and (b) the total power dissipated in the three bulbs
04
Sep
Three 60 W (120 V) light bulbs are connected across a 120 V power line shown in figure. Find (a) the voltage across each bulb and (b) the total power dissipated in the three bulbs Three 60 W (120 V) light bulbs are connected across a 120 V power line shown in figure. Find (a) [...]
A block of mass m hangs by means of a string which goes over a pulley of mass M and moment of inertia I, as shown in the diagram. The string does not slip relative to the pulley. Find the frequency of small oscillations.
04
Sep
A block of mass m hangs by means of a string which goes over a pulley of mass M and moment of inertia I, as shown in the diagram. The string does not slip relative to the pulley. Find the frequency of small oscillations. A block of mass m hangs by means of a string [...]
A variable capacitor is adjusted to its lowest capacitance C0 and is connected with a source of constant voltage V for a long time. The resistance of connecting wires is R. At t=0, its capacitance starts to increase so that a constant current I starts to flow through the circuit. Calculate at time t, (i) Power supplied by the source (ii) thermal power generated in the connecting wire (iii) rate of increase of electrostatic energy stored in capacitor (iv) What do you infer from the above three results?
04
Sep
A variable capacitor is adjusted to its lowest capacitance C0 and is connected with a source of constant voltage V for a long time. The resistance of connecting wires is R. At t=0, its capacitance starts to increase so that a constant current I starts to flow through the circuit. Calculate at time t, (i) [...]
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A variable capacitor is adjusted to its lowest capacitance C0 and is connected with a source of constant voltage V for a long time. The resistance of connecting wires is R. At t=0 ,
In a house having 220 V line ,
its capacitance starts to increase so that a constant current I starts to flow through the circuit. Calculate at time t ,
the following appliances are working : (i) a 60 W bulb and (ii) a 1000 W heater(iii) a 40 W radio. Calculate (a) the current drawn by heater and (b) the current passing through the fuse line. ,
A uniform rod of mass m and length l hangs from a rigid support (smooth pivot) P. A light spring of stiffness k is rigidly attached with the rod at a point Q at a distance b below the pivot. Find the angular
04
Sep
A uniform rod of mass m and length l hangs from a rigid support (smooth pivot) P. A light spring of stiffness k is rigidly attached with the rod at a point Q at a distance b below the pivot. Find the angular A uniform disc of radius 5.0 cm and mass 200 g is [...]
What amount of heat will be generated in a coil of resistance R due to a charge q passing through it if the current in the coil a. decreases down to zero uniformly during a time interval t0? b. decrease down to zero having its value every t0 seconds?
04
Sep
What amount of heat will be generated in a coil of resistance R due to a charge q passing through it if the current in the coil a. decreases down to zero uniformly during a time interval t0? b. decrease down to zero having its value every t0 seconds? In a house having 220 V [...]
In a house having 220 V line, the following appliances are working : (i) a 60 W bulb and (ii) a 1000 W heater(iii) a 40 W radio. Calculate (a) the current drawn by heater and (b) the current passing through the fuse line.
04
Sep
In a house having 220 V line, the following appliances are working : (i) a 60 W bulb and (ii) a 1000 W heater(iii) a 40 W radio. Calculate (a) the current drawn by heater and (b) the current passing through the fuse line. In a house having 220 V line the following appliances are [...]
Two uniform wires of same material , each weighing 1 g but one having double the length of the other, are connected in series , carrying a current of 10 A. The length of the longer wire is 20 cm. Calculate the rate of consumption of energy in each of the two wires. which wire gets hotter ? The density of the material of the wire is 20×10^−5 Ω cm.
04
Sep
Two uniform wires of same material , each weighing 1 g but one having double the length of the other, are connected in series , carrying a current of 10 A. The length of the longer wire is 20 cm. Calculate the rate of consumption of energy in each of the two wires. which wire [...]
Determine the current through the battery of internal resistance 0.5 ohm for the circuit shown in figure. how much power is dissipated in 6 ohm resistance?
04
Sep
Determine the current through the battery of internal resistance 0.5 ohm for the circuit shown in figure. how much power is dissipated in 6 ohm resistance? Determine the current through the battery of internal resistance 0.5 ohm for the circuit shown in figure. how much power is dissipated in 6 ohm resistance? September 4, 2020 [...]
How will you connect ( series and parallel ) 24 cells each of internal resistance 1Ω to get maximum power output across a load of 10Ω?
04
Sep
How will you connect ( series and parallel ) 24 cells each of internal resistance 1Ω to get maximum power output across a load of 10Ω? How will you connect ( series and parallel ) 24 cells each of internal resistance 1Ω to get maximum power output across a load of 10Ω? September 4, 2020 [...]
In a circuit shown in Fig, resistances R1 and R2 are known , as well as emf’s ξ1 and ξ2. The internal resistances of the sources are negligible. At what value of the resistance R will the thermal power generated in it be the highest ? What is it equal to ?
04
Sep
In a circuit shown in Fig, resistances R1 and R2 are known , as well as emf’s ξ1 and ξ2. The internal resistances of the sources are negligible. At what value of the resistance R will the thermal power generated in it be the highest ? What is it equal to ? as well as [...]