268478
If the resistance of a circuit having\(12 \mathrm{~V}\) source is increased by \(4_{\Omega}\), thecurrent dropsby \(0.5 \mathrm{~A}\). What is the original resistance of circuit
1 \(4 \Omega\)
2 \(8 \Omega\)
3 \(16 \Omega\)
4 \(\frac{1}{16} \Omega\)
Explanation:
\(V=i R\) \(12=(\mathrm{i}-0.5)(\mathrm{R}+4)\)
Current Electricity
268479
An electric currentis passed through a circuit containing two wires of the same material connected in parallel. If the lengths and radii of the wire are in the ratio \(4 / 3\) and \(2 / 3\), then theratio of the currents passing through the wires will be
1 \(1 / 3\)
2 \(3 / 1\)
3 \(4 / 3\)
4 \(3 / 4\)
Explanation:
\(\mathrm{V}\) - iR \(\quad \mathrm{V}=\) constant \(i_{1} R_{1}=i_{2} R_{2}\) \(\frac{i_{1}}{i_{2}}=\frac{R_{2}}{R_{1}}\) \(\because R \propto \frac{I}{A}\)
Current Electricity
268480
When '\(n\) ' wires which are identical are connected in series, the effective resistance exceeds that when they are in parallel by \(X / Y\) \(\Omega\). Then the resistance of each wire is
1 \(\frac{x n}{y\left(n^{2}-1\right)}\)
2 \(\frac{y n}{x\left(n^{2}-1\right)}\)
3 \(\frac{x n}{y(n-1)}\)
4 \(\frac{y n}{x(n-1)}\)
Explanation:
\(R_{s}=R_{p}+\left(\frac{X}{Y}\right)\)
Current Electricity
268481
The equivalent resistance across\(A\) and \(B\) is
268478
If the resistance of a circuit having\(12 \mathrm{~V}\) source is increased by \(4_{\Omega}\), thecurrent dropsby \(0.5 \mathrm{~A}\). What is the original resistance of circuit
1 \(4 \Omega\)
2 \(8 \Omega\)
3 \(16 \Omega\)
4 \(\frac{1}{16} \Omega\)
Explanation:
\(V=i R\) \(12=(\mathrm{i}-0.5)(\mathrm{R}+4)\)
Current Electricity
268479
An electric currentis passed through a circuit containing two wires of the same material connected in parallel. If the lengths and radii of the wire are in the ratio \(4 / 3\) and \(2 / 3\), then theratio of the currents passing through the wires will be
1 \(1 / 3\)
2 \(3 / 1\)
3 \(4 / 3\)
4 \(3 / 4\)
Explanation:
\(\mathrm{V}\) - iR \(\quad \mathrm{V}=\) constant \(i_{1} R_{1}=i_{2} R_{2}\) \(\frac{i_{1}}{i_{2}}=\frac{R_{2}}{R_{1}}\) \(\because R \propto \frac{I}{A}\)
Current Electricity
268480
When '\(n\) ' wires which are identical are connected in series, the effective resistance exceeds that when they are in parallel by \(X / Y\) \(\Omega\). Then the resistance of each wire is
1 \(\frac{x n}{y\left(n^{2}-1\right)}\)
2 \(\frac{y n}{x\left(n^{2}-1\right)}\)
3 \(\frac{x n}{y(n-1)}\)
4 \(\frac{y n}{x(n-1)}\)
Explanation:
\(R_{s}=R_{p}+\left(\frac{X}{Y}\right)\)
Current Electricity
268481
The equivalent resistance across\(A\) and \(B\) is
268478
If the resistance of a circuit having\(12 \mathrm{~V}\) source is increased by \(4_{\Omega}\), thecurrent dropsby \(0.5 \mathrm{~A}\). What is the original resistance of circuit
1 \(4 \Omega\)
2 \(8 \Omega\)
3 \(16 \Omega\)
4 \(\frac{1}{16} \Omega\)
Explanation:
\(V=i R\) \(12=(\mathrm{i}-0.5)(\mathrm{R}+4)\)
Current Electricity
268479
An electric currentis passed through a circuit containing two wires of the same material connected in parallel. If the lengths and radii of the wire are in the ratio \(4 / 3\) and \(2 / 3\), then theratio of the currents passing through the wires will be
1 \(1 / 3\)
2 \(3 / 1\)
3 \(4 / 3\)
4 \(3 / 4\)
Explanation:
\(\mathrm{V}\) - iR \(\quad \mathrm{V}=\) constant \(i_{1} R_{1}=i_{2} R_{2}\) \(\frac{i_{1}}{i_{2}}=\frac{R_{2}}{R_{1}}\) \(\because R \propto \frac{I}{A}\)
Current Electricity
268480
When '\(n\) ' wires which are identical are connected in series, the effective resistance exceeds that when they are in parallel by \(X / Y\) \(\Omega\). Then the resistance of each wire is
1 \(\frac{x n}{y\left(n^{2}-1\right)}\)
2 \(\frac{y n}{x\left(n^{2}-1\right)}\)
3 \(\frac{x n}{y(n-1)}\)
4 \(\frac{y n}{x(n-1)}\)
Explanation:
\(R_{s}=R_{p}+\left(\frac{X}{Y}\right)\)
Current Electricity
268481
The equivalent resistance across\(A\) and \(B\) is
268478
If the resistance of a circuit having\(12 \mathrm{~V}\) source is increased by \(4_{\Omega}\), thecurrent dropsby \(0.5 \mathrm{~A}\). What is the original resistance of circuit
1 \(4 \Omega\)
2 \(8 \Omega\)
3 \(16 \Omega\)
4 \(\frac{1}{16} \Omega\)
Explanation:
\(V=i R\) \(12=(\mathrm{i}-0.5)(\mathrm{R}+4)\)
Current Electricity
268479
An electric currentis passed through a circuit containing two wires of the same material connected in parallel. If the lengths and radii of the wire are in the ratio \(4 / 3\) and \(2 / 3\), then theratio of the currents passing through the wires will be
1 \(1 / 3\)
2 \(3 / 1\)
3 \(4 / 3\)
4 \(3 / 4\)
Explanation:
\(\mathrm{V}\) - iR \(\quad \mathrm{V}=\) constant \(i_{1} R_{1}=i_{2} R_{2}\) \(\frac{i_{1}}{i_{2}}=\frac{R_{2}}{R_{1}}\) \(\because R \propto \frac{I}{A}\)
Current Electricity
268480
When '\(n\) ' wires which are identical are connected in series, the effective resistance exceeds that when they are in parallel by \(X / Y\) \(\Omega\). Then the resistance of each wire is
1 \(\frac{x n}{y\left(n^{2}-1\right)}\)
2 \(\frac{y n}{x\left(n^{2}-1\right)}\)
3 \(\frac{x n}{y(n-1)}\)
4 \(\frac{y n}{x(n-1)}\)
Explanation:
\(R_{s}=R_{p}+\left(\frac{X}{Y}\right)\)
Current Electricity
268481
The equivalent resistance across\(A\) and \(B\) is
