OHM'SLAW AND COMBINATION OF RESISTANCES
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Current Electricity

268298 The electrical resistance of a mercury column in a cylindrical container is ' \(R\) '. The mercury ispoured into another cylindrical container with half the radius of cross-section. Theresistance of the mercury column is

1 \(R\)
2 \(2 R\)
3 \(16 R\)
4 \(5 R\)
Current Electricity

268299 Four conductors of same resistance connected to form a square. If the resistance between diagonally opposite corners is 8 ohm, the resistance between any two adjacent corners is

1 32 ohm
2 8 ohm
3 \(1 / 6 \mathrm{ohm}\)
4 6 ohm
Current Electricity

268300 The resistivity of a material is \(\mathrm{S}\) ohm meter. The resistance between opposite faces of a solid cube of edge \(10 \mathrm{~cm}\) is ( in ohm)

1 \(S / 2\)
2 \(S / 10\)
3 \(100 \mathrm{~S}\)
4 \(10 S\)
Current Electricity

268301 Four wires made of same material have different lengths and radii, the wire having more resistance in the following case is

1 \(\ell=100 \mathrm{~cm}, r=1 \mathrm{~mm}\)
2 \(\ell=50 \mathrm{~cm}, r=2 \mathrm{~mm}\)
3 \(\ell=100 \mathrm{~cm}, r=\frac{1}{2} \mathrm{~mm}\)
4 \(\ell=50 \mathrm{~cm}, r=\frac{1}{2} \mathrm{~mm}\)
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Current Electricity

268298 The electrical resistance of a mercury column in a cylindrical container is ' \(R\) '. The mercury ispoured into another cylindrical container with half the radius of cross-section. Theresistance of the mercury column is

1 \(R\)
2 \(2 R\)
3 \(16 R\)
4 \(5 R\)
Current Electricity

268299 Four conductors of same resistance connected to form a square. If the resistance between diagonally opposite corners is 8 ohm, the resistance between any two adjacent corners is

1 32 ohm
2 8 ohm
3 \(1 / 6 \mathrm{ohm}\)
4 6 ohm
Current Electricity

268300 The resistivity of a material is \(\mathrm{S}\) ohm meter. The resistance between opposite faces of a solid cube of edge \(10 \mathrm{~cm}\) is ( in ohm)

1 \(S / 2\)
2 \(S / 10\)
3 \(100 \mathrm{~S}\)
4 \(10 S\)
Current Electricity

268301 Four wires made of same material have different lengths and radii, the wire having more resistance in the following case is

1 \(\ell=100 \mathrm{~cm}, r=1 \mathrm{~mm}\)
2 \(\ell=50 \mathrm{~cm}, r=2 \mathrm{~mm}\)
3 \(\ell=100 \mathrm{~cm}, r=\frac{1}{2} \mathrm{~mm}\)
4 \(\ell=50 \mathrm{~cm}, r=\frac{1}{2} \mathrm{~mm}\)
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Current Electricity

268298 The electrical resistance of a mercury column in a cylindrical container is ' \(R\) '. The mercury ispoured into another cylindrical container with half the radius of cross-section. Theresistance of the mercury column is

1 \(R\)
2 \(2 R\)
3 \(16 R\)
4 \(5 R\)
Current Electricity

268299 Four conductors of same resistance connected to form a square. If the resistance between diagonally opposite corners is 8 ohm, the resistance between any two adjacent corners is

1 32 ohm
2 8 ohm
3 \(1 / 6 \mathrm{ohm}\)
4 6 ohm
Current Electricity

268300 The resistivity of a material is \(\mathrm{S}\) ohm meter. The resistance between opposite faces of a solid cube of edge \(10 \mathrm{~cm}\) is ( in ohm)

1 \(S / 2\)
2 \(S / 10\)
3 \(100 \mathrm{~S}\)
4 \(10 S\)
Current Electricity

268301 Four wires made of same material have different lengths and radii, the wire having more resistance in the following case is

1 \(\ell=100 \mathrm{~cm}, r=1 \mathrm{~mm}\)
2 \(\ell=50 \mathrm{~cm}, r=2 \mathrm{~mm}\)
3 \(\ell=100 \mathrm{~cm}, r=\frac{1}{2} \mathrm{~mm}\)
4 \(\ell=50 \mathrm{~cm}, r=\frac{1}{2} \mathrm{~mm}\)
For More Updates join with Us
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
Current Electricity

268298 The electrical resistance of a mercury column in a cylindrical container is ' \(R\) '. The mercury ispoured into another cylindrical container with half the radius of cross-section. Theresistance of the mercury column is

1 \(R\)
2 \(2 R\)
3 \(16 R\)
4 \(5 R\)
Current Electricity

268299 Four conductors of same resistance connected to form a square. If the resistance between diagonally opposite corners is 8 ohm, the resistance between any two adjacent corners is

1 32 ohm
2 8 ohm
3 \(1 / 6 \mathrm{ohm}\)
4 6 ohm
Current Electricity

268300 The resistivity of a material is \(\mathrm{S}\) ohm meter. The resistance between opposite faces of a solid cube of edge \(10 \mathrm{~cm}\) is ( in ohm)

1 \(S / 2\)
2 \(S / 10\)
3 \(100 \mathrm{~S}\)
4 \(10 S\)
Current Electricity

268301 Four wires made of same material have different lengths and radii, the wire having more resistance in the following case is

1 \(\ell=100 \mathrm{~cm}, r=1 \mathrm{~mm}\)
2 \(\ell=50 \mathrm{~cm}, r=2 \mathrm{~mm}\)
3 \(\ell=100 \mathrm{~cm}, r=\frac{1}{2} \mathrm{~mm}\)
4 \(\ell=50 \mathrm{~cm}, r=\frac{1}{2} \mathrm{~mm}\)