Question Answers
Sahay Sir > Question Answers
In the circuit shown in the figure, the heat produced in 5 ohm resistance is 10 calories per second. The heat produced in 4 resistance is
21
Sep
In the circuit shown in the figure, the heat produced in 5 ohm resistance is 10 calories per second. The heat produced in 4 resistance is In the circuit shown in the figure: the heat produced in 5 ohm resistance is 10 calories per second. The heat produced in 4 resistance is September 21, 2020 [...]
Two bulbs X and Y having same voltage rating and of power 40 watt and 60 watt respectively are connected in series across a potential difference of 300 volt, then
21
Sep
Two bulbs X and Y having same voltage rating and of power 40 watt and 60 watt respectively are connected in series across a potential difference of 300 volt, then then Two bulbs X and Y having same voltage rating and of power 40 watt and 60 watt respectively are connected in series across a [...]
Some electric bulb are connected in series across a 220 V supply in a room . If one bulb is fused the remaining are connected again in series across the same supply. The illumination will be
21
Sep
Some electric bulb are connected in series across a 220 V supply in a room . If one bulb is fused the remaining are connected again in series across the same supply. The illumination will be Some electric bulb are connected in series across a 220 V supply in a room . If one bulb [...]
What will happen when a 40 W, 220 V lamp and 100 W, 220 V lamp are connected in series across 40 V supply ?
21
Sep
What will happen when a 40 W, 220 V lamp and 100 W, 220 V lamp are connected in series across 40 V supply ? 220 V lamp and 100 W 220 V lamp are connected in series across 40 V supply ? What will happen when a 40 W September 21, 2020 Category: Uncategorised [...]
Electric bulb 50 W – 100 V glowing at full poer rate to be used in parallel with battery 120 V, 10 ohm. Maximum number of bulbs that can be connected so that they glow in full power is
21
Sep
Electric bulb 50 W – 100 V glowing at full poer rate to be used in parallel with battery 120 V, 10 ohm. Maximum number of bulbs that can be connected so that they glow in full power is 10 ohm. Maximum number of bulbs that can be connected so that they glow in full [...]
A constant current i is passed through a resistor. Taking the temperature coefficient of resistance into account, indicate which of the plots shown in Figure best represents the rate of production of thermal energy in the resistor
21
Sep
A constant current i is passed through a resistor. Taking the temperature coefficient of resistance into account, indicate which of the plots shown in Figure best represents the rate of production of thermal energy in the resistor A constant current i is passed through a resistor. Taking the temperature coefficient of resistance into account indicate [...]
When an electric heater is switced on, the current flowing through it i) is plotted against time (t). Taking in to account the variation of resistance with temperature, which of the folllowing best represents the resulting curve.
21
Sep
When an electric heater is switced on, the current flowing through it i) is plotted against time (t). Taking in to account the variation of resistance with temperature, which of the folllowing best represents the resulting curve. the current flowing through it i) is plotted against time (t). Taking in to account the variation of [...]
Power P is to be delivered to a device via transmission cables having resistance Rc. If V is the voltage across R and I the current through it , find the power wasted and how can it be reduced.
21
Sep
Power P is to be delivered to a device via transmission cables having resistance Rc. If V is the voltage across R and I the current through it , find the power wasted and how can it be reduced. find the power wasted and how can it be reduced. Power P is to be delivered [...]
A room AC run for 5 hour at a voltage of 220 V The wiring of the room constant of Cu of 1 mm ratio and a length of 10 m consumption per day is 10 commerclal unit What fraction of it goes in the joule heated in wire? What would happen if the wiring is made of aluminum of the same distances? [ρcu = 1.7 × 10^−8Ω, ρA1 = 2.7 × 10^−8 Ω m]
21
Sep
A room AC run for 5 hour at a voltage of 220 V The wiring of the room constant of Cu of 1 mm ratio and a length of 10 m consumption per day is 10 commerclal unit What fraction of it goes in the joule heated in wire? What would happen if the wiring [...]
A steel wire has a resistance twice that of an aluminium wire. Both of them are connected with a constant voltage supply. More heat will be dissipated in
21
Sep
A steel wire has a resistance twice that of an aluminium wire. Both of them are connected with a constant voltage supply. More heat will be dissipated in A steel wire has a resistance twice that of an aluminium wire. Both of them are connected with a constant voltage supply. More heat will be dissipated [...]