268432 The temperature coefficient of resistance of platinum is \(\alpha=3.92 \times 10^{-3} \mathrm{~K}^{-1}\) at \(20^{\circ} \mathrm{C}\). F ind the temperature at which the increase in the resistance of platinum wire is \(10 \%\) of its value at \(20^{\circ} \mathrm{C}\)

268433 Four identical resistancearej oined as shown in fig. The equivalent resistance between points \(A\) and \(B\) is \(R_{1}\) and that between \(A\) and \(\mathrm{C}\) is \(R_{2^{2}}\). Then ratio of \(\frac{R_{1}}{R_{2}}\) is

268434 If the galvanometer reading is zero in the given circuit, the current passing through resistance \(250_{\Omega}\) is

268435 The effective resistance between \(A\) and \(B\) is the given circuit is

268432 The temperature coefficient of resistance of platinum is \(\alpha=3.92 \times 10^{-3} \mathrm{~K}^{-1}\) at \(20^{\circ} \mathrm{C}\). F ind the temperature at which the increase in the resistance of platinum wire is \(10 \%\) of its value at \(20^{\circ} \mathrm{C}\)

268433 Four identical resistancearej oined as shown in fig. The equivalent resistance between points \(A\) and \(B\) is \(R_{1}\) and that between \(A\) and \(\mathrm{C}\) is \(R_{2^{2}}\). Then ratio of \(\frac{R_{1}}{R_{2}}\) is

268434 If the galvanometer reading is zero in the given circuit, the current passing through resistance \(250_{\Omega}\) is

268435 The effective resistance between \(A\) and \(B\) is the given circuit is

268432 The temperature coefficient of resistance of platinum is \(\alpha=3.92 \times 10^{-3} \mathrm{~K}^{-1}\) at \(20^{\circ} \mathrm{C}\). F ind the temperature at which the increase in the resistance of platinum wire is \(10 \%\) of its value at \(20^{\circ} \mathrm{C}\)

268433 Four identical resistancearej oined as shown in fig. The equivalent resistance between points \(A\) and \(B\) is \(R_{1}\) and that between \(A\) and \(\mathrm{C}\) is \(R_{2^{2}}\). Then ratio of \(\frac{R_{1}}{R_{2}}\) is

268434 If the galvanometer reading is zero in the given circuit, the current passing through resistance \(250_{\Omega}\) is

268435 The effective resistance between \(A\) and \(B\) is the given circuit is

268432 The temperature coefficient of resistance of platinum is \(\alpha=3.92 \times 10^{-3} \mathrm{~K}^{-1}\) at \(20^{\circ} \mathrm{C}\). F ind the temperature at which the increase in the resistance of platinum wire is \(10 \%\) of its value at \(20^{\circ} \mathrm{C}\)

268433 Four identical resistancearej oined as shown in fig. The equivalent resistance between points \(A\) and \(B\) is \(R_{1}\) and that between \(A\) and \(\mathrm{C}\) is \(R_{2^{2}}\). Then ratio of \(\frac{R_{1}}{R_{2}}\) is

268434 If the galvanometer reading is zero in the given circuit, the current passing through resistance \(250_{\Omega}\) is

268435 The effective resistance between \(A\) and \(B\) is the given circuit is