268302
Two different wires have specific resistivities, lengths, area of cross-sections are in the raio \(3: 4,2: 9\) and \(8: 27\). Then theratio of resistance of two wires is
1 \(\frac{16}{9}\)
2 \(\frac{9}{16}\)
3 \(\frac{8}{27}\)
4 \(\frac{27}{8}\)
Explanation:
\(R=\frac{\rho l}{A}\)
Current Electricity
268303
Two wires made of same material have their length are in the ratio \(1: 2\) and their masses in the ratio \(3: 16\). The ratio of resistance of two wires is
1 \(3 / 4\)
2 \(1: 2\)
3 \(2: 1\)
4 \(4: 3\)
Explanation:
\(R \propto \frac{l^{2}}{m}\)
Current Electricity
268305
A piece of wire of resistance \(4 \Omega\) is bent through \(180^{\circ}\) at its midpoint and the two halves are twisted together. Then the resistance is
1 \(8 \Omega\)
2 \(1 \Omega\)
3 \(2 \Omega\)
4 \(5 \Omega\)
Explanation:
\(R^{1}=\frac{R_{1} R_{2}}{R_{1}+R_{2}}\)
Current Electricity
268306
If three wires of equal resistance are given then number of combinations they cany be made to give different resistance is
268302
Two different wires have specific resistivities, lengths, area of cross-sections are in the raio \(3: 4,2: 9\) and \(8: 27\). Then theratio of resistance of two wires is
1 \(\frac{16}{9}\)
2 \(\frac{9}{16}\)
3 \(\frac{8}{27}\)
4 \(\frac{27}{8}\)
Explanation:
\(R=\frac{\rho l}{A}\)
Current Electricity
268303
Two wires made of same material have their length are in the ratio \(1: 2\) and their masses in the ratio \(3: 16\). The ratio of resistance of two wires is
1 \(3 / 4\)
2 \(1: 2\)
3 \(2: 1\)
4 \(4: 3\)
Explanation:
\(R \propto \frac{l^{2}}{m}\)
Current Electricity
268305
A piece of wire of resistance \(4 \Omega\) is bent through \(180^{\circ}\) at its midpoint and the two halves are twisted together. Then the resistance is
1 \(8 \Omega\)
2 \(1 \Omega\)
3 \(2 \Omega\)
4 \(5 \Omega\)
Explanation:
\(R^{1}=\frac{R_{1} R_{2}}{R_{1}+R_{2}}\)
Current Electricity
268306
If three wires of equal resistance are given then number of combinations they cany be made to give different resistance is
268302
Two different wires have specific resistivities, lengths, area of cross-sections are in the raio \(3: 4,2: 9\) and \(8: 27\). Then theratio of resistance of two wires is
1 \(\frac{16}{9}\)
2 \(\frac{9}{16}\)
3 \(\frac{8}{27}\)
4 \(\frac{27}{8}\)
Explanation:
\(R=\frac{\rho l}{A}\)
Current Electricity
268303
Two wires made of same material have their length are in the ratio \(1: 2\) and their masses in the ratio \(3: 16\). The ratio of resistance of two wires is
1 \(3 / 4\)
2 \(1: 2\)
3 \(2: 1\)
4 \(4: 3\)
Explanation:
\(R \propto \frac{l^{2}}{m}\)
Current Electricity
268305
A piece of wire of resistance \(4 \Omega\) is bent through \(180^{\circ}\) at its midpoint and the two halves are twisted together. Then the resistance is
1 \(8 \Omega\)
2 \(1 \Omega\)
3 \(2 \Omega\)
4 \(5 \Omega\)
Explanation:
\(R^{1}=\frac{R_{1} R_{2}}{R_{1}+R_{2}}\)
Current Electricity
268306
If three wires of equal resistance are given then number of combinations they cany be made to give different resistance is
268302
Two different wires have specific resistivities, lengths, area of cross-sections are in the raio \(3: 4,2: 9\) and \(8: 27\). Then theratio of resistance of two wires is
1 \(\frac{16}{9}\)
2 \(\frac{9}{16}\)
3 \(\frac{8}{27}\)
4 \(\frac{27}{8}\)
Explanation:
\(R=\frac{\rho l}{A}\)
Current Electricity
268303
Two wires made of same material have their length are in the ratio \(1: 2\) and their masses in the ratio \(3: 16\). The ratio of resistance of two wires is
1 \(3 / 4\)
2 \(1: 2\)
3 \(2: 1\)
4 \(4: 3\)
Explanation:
\(R \propto \frac{l^{2}}{m}\)
Current Electricity
268305
A piece of wire of resistance \(4 \Omega\) is bent through \(180^{\circ}\) at its midpoint and the two halves are twisted together. Then the resistance is
1 \(8 \Omega\)
2 \(1 \Omega\)
3 \(2 \Omega\)
4 \(5 \Omega\)
Explanation:
\(R^{1}=\frac{R_{1} R_{2}}{R_{1}+R_{2}}\)
Current Electricity
268306
If three wires of equal resistance are given then number of combinations they cany be made to give different resistance is
