I have to make a science working model on any topic. What should I make and how?
Two conducting wires of the same material and of equal lengths and equal diameters are first connected in series and then parallel in a circuit across the same potential difference. The ratio of heat produced in series and parallel combinations would be −
(a) 1:2
(b) 2:1
(c) 1:4
(d) 4:1
draw a circiut diagram for the verification of Ohm's law ????
The values of current I flowing in a given resistor for the corresponding values of potential difference V across the resistor are given below −
I (amperes )
0.5
1.0
2.0
3.0
4.0
V (volts)
1.6
3.4
6.7
10.2
13.2
Plot a graph between V and I and calculate the resistance of that resistor.
Estimate the average drift speed of conduction electrons in a copper wire of cross sectional area 1 x 10-7 m2, carrying a current of 1.5 A.Assume that each copper atom contributes roughly one conduction electron . The no. of copper atoms per cubic metre is 8.5 x 1028.
Name the material used for making the (a) fuse wire (b) connecting wire (c) heating element (d) filament of the bulb..??
WHAT IS THE RESISTANCE OF AN IDEAL AMMETER AND VOLTMETER?
a wire of resistance 20 ohm is bent to form a closed square. what is the resistance across the diagonal of the square ?
A copper wire has a diameter of 0.5 mm and resistivity of 1.6 × 10−8Ωm. What has to be the length of this wire so that its resistance becomes 10Ω? How much will the resistance change if the diameter is doubled?tell the length of wire?
Name a device that helps to maintain a potential difference across a conductor?
in a household , an electric bulb of 100W is used for 5 hours and an electric heater of 1000 watts for every day . calculate the cost of using bulb and the heater for 30 days if the cost of one unit of electrical energy is 2 rupees
A potential difference V is applied across a conductor of length L and diameter D. how the electric field E and resistance R affected when:
(1) V is halved (2) L is halved (3) D is doubled
justify answer in each case
what is the difference between ammeter and voltmeter.
A given length of a wire is doubled on itself and this process is repeated once again.
I have to make a science working model on any topic. What should I make and how?
Two conducting wires of the same material and of equal lengths and equal diameters are first connected in series and then parallel in a circuit across the same potential difference. The ratio of heat produced in series and parallel combinations would be −
(a) 1:2
(b) 2:1
(c) 1:4
(d) 4:1
draw a circiut diagram for the verification of Ohm's law ????
The values of current I flowing in a given resistor for the corresponding values of potential difference V across the resistor are given below −
I (amperes )
0.5
1.0
2.0
3.0
4.0
V (volts)
1.6
3.4
6.7
10.2
13.2
Plot a graph between V and I and calculate the resistance of that resistor.
Estimate the average drift speed of conduction electrons in a copper wire of cross sectional area 1 x 10-7 m2, carrying a current of 1.5 A.Assume that each copper atom contributes roughly one conduction electron . The no. of copper atoms per cubic metre is 8.5 x 1028.
Name the material used for making the (a) fuse wire (b) connecting wire (c) heating element (d) filament of the bulb..??
WHAT IS THE RESISTANCE OF AN IDEAL AMMETER AND VOLTMETER?
a wire of resistance 20 ohm is bent to form a closed square. what is the resistance across the diagonal of the square ?
A copper wire has a diameter of 0.5 mm and resistivity of 1.6 × 10−8Ωm. What has to be the length of this wire so that its resistance becomes 10Ω? How much will the resistance change if the diameter is doubled?tell the length of wire?
Name a device that helps to maintain a potential difference across a conductor?
in a household , an electric bulb of 100W is used for 5 hours and an electric heater of 1000 watts for every day . calculate the cost of using bulb and the heater for 30 days if the cost of one unit of electrical energy is 2 rupees
A potential difference V is applied across a conductor of length L and diameter D. how the electric field E and resistance R affected when:
(1) V is halved (2) L is halved (3) D is doubled
justify answer in each case
what is the difference between ammeter and voltmeter.
A given length of a wire is doubled on itself and this process is repeated once again.
By what factor does the resistance of the wire changes ?