Drift of Electrons and the Origin of Resistivity
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
PHXII03:CURRENT ELECTRICITY

357048 The figure shows three conductors I, II and III of same material, different lengths, \({\rm{l,}}2{\rm{l}}\) and \(3{\rm{l}}\) and of different areas of cross-section 3\(A\), \(A\) and 2\(A\) respectively. Arrange them in the increasing order of current drawn from battery.
supporting img

1 \({i_3} < {i_2} < {i_1}\)
2 \({i_1} < {i_2} < {i_3}\)
3 \({i_2} < {i_3} < {i_1}\)
4 \({i_2} < {i_1} < {i_3}\)
PHXII03:CURRENT ELECTRICITY

357049 A conductor with rectangular cross section has dimension \((a \times 2 a \times 4 a)\) as shown in figure. Resistance across \(A B\) is \(x\), across \(C D\) is \(y\) and across \(E F\) is \(z\). Then
supporting img

1 \(x=y=z\)
2 \(x>y>z\)
3 \(y>z>x\)
4 \(x>z>y\)
PHXII03:CURRENT ELECTRICITY

357050 A metal wire of circular cross-section has a resistance \({{\rm{R}}_{\rm{1}}}\). The wire is now stretched without breaking so that its length is doubled and the density is assumed to remain the same. If the resistance of the wire now becomes \({{\rm{R}}_{\rm{2}}}\) then \({{\rm{R}}_2}:{{\rm{R}}_1}\) is

1 \(1:4\)
2 \(1:1\)
3 \(4:1\)
4 \(10:2\)
PHXII03:CURRENT ELECTRICITY

357051 Two conductors are made of the same material and have the same length. Conductor \(A\) is a solid wire of diameter 1 \(mm\). Conductor \(B\) is a hollow tube of outer diameter 2 \(mm\) and inner diameter 1 \(mm\). What is the ratio of resistance \({R_A}{\rm{to}}\,{R_B}\)?

1 \(3\,{\rm{:}}\,2\)
2 \(3\,{\rm{:}}\,1\)
3 \(1\,{\rm{:}}\,3\)
4 \(2\,{\rm{:}}\,3\)
PHXII03:CURRENT ELECTRICITY

357048 The figure shows three conductors I, II and III of same material, different lengths, \({\rm{l,}}2{\rm{l}}\) and \(3{\rm{l}}\) and of different areas of cross-section 3\(A\), \(A\) and 2\(A\) respectively. Arrange them in the increasing order of current drawn from battery.
supporting img

1 \({i_3} < {i_2} < {i_1}\)
2 \({i_1} < {i_2} < {i_3}\)
3 \({i_2} < {i_3} < {i_1}\)
4 \({i_2} < {i_1} < {i_3}\)
PHXII03:CURRENT ELECTRICITY

357049 A conductor with rectangular cross section has dimension \((a \times 2 a \times 4 a)\) as shown in figure. Resistance across \(A B\) is \(x\), across \(C D\) is \(y\) and across \(E F\) is \(z\). Then
supporting img

1 \(x=y=z\)
2 \(x>y>z\)
3 \(y>z>x\)
4 \(x>z>y\)
PHXII03:CURRENT ELECTRICITY

357050 A metal wire of circular cross-section has a resistance \({{\rm{R}}_{\rm{1}}}\). The wire is now stretched without breaking so that its length is doubled and the density is assumed to remain the same. If the resistance of the wire now becomes \({{\rm{R}}_{\rm{2}}}\) then \({{\rm{R}}_2}:{{\rm{R}}_1}\) is

1 \(1:4\)
2 \(1:1\)
3 \(4:1\)
4 \(10:2\)
PHXII03:CURRENT ELECTRICITY

357051 Two conductors are made of the same material and have the same length. Conductor \(A\) is a solid wire of diameter 1 \(mm\). Conductor \(B\) is a hollow tube of outer diameter 2 \(mm\) and inner diameter 1 \(mm\). What is the ratio of resistance \({R_A}{\rm{to}}\,{R_B}\)?

1 \(3\,{\rm{:}}\,2\)
2 \(3\,{\rm{:}}\,1\)
3 \(1\,{\rm{:}}\,3\)
4 \(2\,{\rm{:}}\,3\)
PHXII03:CURRENT ELECTRICITY

357048 The figure shows three conductors I, II and III of same material, different lengths, \({\rm{l,}}2{\rm{l}}\) and \(3{\rm{l}}\) and of different areas of cross-section 3\(A\), \(A\) and 2\(A\) respectively. Arrange them in the increasing order of current drawn from battery.
supporting img

1 \({i_3} < {i_2} < {i_1}\)
2 \({i_1} < {i_2} < {i_3}\)
3 \({i_2} < {i_3} < {i_1}\)
4 \({i_2} < {i_1} < {i_3}\)
PHXII03:CURRENT ELECTRICITY

357049 A conductor with rectangular cross section has dimension \((a \times 2 a \times 4 a)\) as shown in figure. Resistance across \(A B\) is \(x\), across \(C D\) is \(y\) and across \(E F\) is \(z\). Then
supporting img

1 \(x=y=z\)
2 \(x>y>z\)
3 \(y>z>x\)
4 \(x>z>y\)
PHXII03:CURRENT ELECTRICITY

357050 A metal wire of circular cross-section has a resistance \({{\rm{R}}_{\rm{1}}}\). The wire is now stretched without breaking so that its length is doubled and the density is assumed to remain the same. If the resistance of the wire now becomes \({{\rm{R}}_{\rm{2}}}\) then \({{\rm{R}}_2}:{{\rm{R}}_1}\) is

1 \(1:4\)
2 \(1:1\)
3 \(4:1\)
4 \(10:2\)
PHXII03:CURRENT ELECTRICITY

357051 Two conductors are made of the same material and have the same length. Conductor \(A\) is a solid wire of diameter 1 \(mm\). Conductor \(B\) is a hollow tube of outer diameter 2 \(mm\) and inner diameter 1 \(mm\). What is the ratio of resistance \({R_A}{\rm{to}}\,{R_B}\)?

1 \(3\,{\rm{:}}\,2\)
2 \(3\,{\rm{:}}\,1\)
3 \(1\,{\rm{:}}\,3\)
4 \(2\,{\rm{:}}\,3\)
PHXII03:CURRENT ELECTRICITY

357048 The figure shows three conductors I, II and III of same material, different lengths, \({\rm{l,}}2{\rm{l}}\) and \(3{\rm{l}}\) and of different areas of cross-section 3\(A\), \(A\) and 2\(A\) respectively. Arrange them in the increasing order of current drawn from battery.
supporting img

1 \({i_3} < {i_2} < {i_1}\)
2 \({i_1} < {i_2} < {i_3}\)
3 \({i_2} < {i_3} < {i_1}\)
4 \({i_2} < {i_1} < {i_3}\)
PHXII03:CURRENT ELECTRICITY

357049 A conductor with rectangular cross section has dimension \((a \times 2 a \times 4 a)\) as shown in figure. Resistance across \(A B\) is \(x\), across \(C D\) is \(y\) and across \(E F\) is \(z\). Then
supporting img

1 \(x=y=z\)
2 \(x>y>z\)
3 \(y>z>x\)
4 \(x>z>y\)
PHXII03:CURRENT ELECTRICITY

357050 A metal wire of circular cross-section has a resistance \({{\rm{R}}_{\rm{1}}}\). The wire is now stretched without breaking so that its length is doubled and the density is assumed to remain the same. If the resistance of the wire now becomes \({{\rm{R}}_{\rm{2}}}\) then \({{\rm{R}}_2}:{{\rm{R}}_1}\) is

1 \(1:4\)
2 \(1:1\)
3 \(4:1\)
4 \(10:2\)
PHXII03:CURRENT ELECTRICITY

357051 Two conductors are made of the same material and have the same length. Conductor \(A\) is a solid wire of diameter 1 \(mm\). Conductor \(B\) is a hollow tube of outer diameter 2 \(mm\) and inner diameter 1 \(mm\). What is the ratio of resistance \({R_A}{\rm{to}}\,{R_B}\)?

1 \(3\,{\rm{:}}\,2\)
2 \(3\,{\rm{:}}\,1\)
3 \(1\,{\rm{:}}\,3\)
4 \(2\,{\rm{:}}\,3\)