Science
Redraw the circuit of Question 1, putting in an ammeter to measure the current through the resistors and a voltmeter to measure the potential difference across the 12 Ω resistor. What would be the readings in the ammeter and the voltmeter?
Related Questions
Use the data in Table 11.2 to answer the following :
(a) Which among iron and mercury is a better conductor?
(b) Which material is the best conductor?
Material Resistivity (Ω m) Conductors Silver 1.60 x 10-8 Copper 1.62 x 10-8 Aluminium 2.63 x 10-8 Tungsten 5.20 x 10-8 Nickel 6.84 x 10-8 Iron 10.0 x 10-8 Chromium 12.9 x 10-8 Mercury 94.0 x 10-8 Manganese 1.84 x 10-6 Alloys Constantan
(alloy of Cu and Ni)49 x 10-6 Manganin
(alloy of Cu, Mn and Ni)44 x 10-6 Nichrome
(alloy of Ni, Cr, Mn and Fe))100 x 10-6 Insulators Glass 1010 - 1014 Hard rubber 1013 - 1016 Ebonite 1015 - 1017 Diamond 1012 - 1013 Paper (dry) 1012 Draw a schematic diagram of a circuit consisting of a battery of three cells of 2 V each, a 5 Ω resistor, an 8 Ω resistor, and a 12 Ω resistor, and a plug key, all connected in series.
Judge the equivalent resistance when the following are connected in parallel – (a) 1 Ω and 106 Ω, (b) 1 Ω, 103 Ω, and 106 Ω.
An electric lamp of 100 Ω, a toaster of resistance 50 Ω, and a water filter of resistance 500 Ω are connected in parallel to a 220 V source. What is the resistance of an electric iron connected to the same source that takes as much current as all three appliances, and what is the current through it?