01. Ohm's Law, Resistance, Conductivity and Thermal Dependency of Resistance
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Current Electricity

152012 A $1 \mathrm{~m}$ long wire of diameter of $0.31 \mathrm{~mm}$ has a resistance of $4.2 \mathrm{ohms}$. If it is replaced by another wire of same material of length $1.5 \mathrm{~m}$ and diameter $0.155 \mathrm{~mm}$, the resistance of wire is

1 $25.2 \mathrm{ohms}$
2 $0.6 \mathrm{ohms}$
3 $26.7 \mathrm{ohms}$
4 $0.8 \mathrm{ohms}$
J and K-CET-2013
Current Electricity

152013 24 Cells of emf $1.5 \mathrm{~V}$ each having internal resistance of $1 \mathrm{ohm}$ are connected to an external resistance of $1.5 \mathrm{ohms}$. To get maximum current

1 all cells are connected in series combination
2 all cells are connected in parallel combination
3 4 cells in each row are connected in series and 6 such rows are connected in parallel
4 6 cells in each row are connected in series and 4 such rows are connected in parallel
J and K-CET-2013
Current Electricity

152014 A coil has resistance $25.00 \mathrm{ohm}$ and $25.17 \mathrm{ohm}$ at $20^{\circ} \mathrm{C}$ and $35^{\circ} \mathrm{C}$ respectively. What is the temperature coefficient of resistances?

1 $4.545 \times 10^{-4} /{ }^{\circ} \mathrm{C}$
2 $4.545 \times 10^{-3} /{ }^{\circ} \mathrm{C}$
3 $4.545 \times 10^{-2} /{ }^{\circ} \mathrm{C}$
4 $4.545 \times 10^{-5} /{ }^{\circ} \mathrm{C}$
J and K-CET-2012
Current Electricity

152017 The carbon resistor has the colour band sequence of green, orange, blue and silver. The of resistance will be

1 $64 \times 10^{7} \pm 20 \% \Omega$
2 $53 \times 10^{6} \pm 20 \% \Omega$
3 $64 \times 10^{7} \pm 10 \% \Omega$
4 $53 \times 10^{6} \pm 10 \% \Omega$
J and K-CET-2015
NEET DIGITAL LIBRARY
Current Electricity

152012 A $1 \mathrm{~m}$ long wire of diameter of $0.31 \mathrm{~mm}$ has a resistance of $4.2 \mathrm{ohms}$. If it is replaced by another wire of same material of length $1.5 \mathrm{~m}$ and diameter $0.155 \mathrm{~mm}$, the resistance of wire is

1 $25.2 \mathrm{ohms}$
2 $0.6 \mathrm{ohms}$
3 $26.7 \mathrm{ohms}$
4 $0.8 \mathrm{ohms}$
J and K-CET-2013
Current Electricity

152013 24 Cells of emf $1.5 \mathrm{~V}$ each having internal resistance of $1 \mathrm{ohm}$ are connected to an external resistance of $1.5 \mathrm{ohms}$. To get maximum current

1 all cells are connected in series combination
2 all cells are connected in parallel combination
3 4 cells in each row are connected in series and 6 such rows are connected in parallel
4 6 cells in each row are connected in series and 4 such rows are connected in parallel
J and K-CET-2013
Current Electricity

152014 A coil has resistance $25.00 \mathrm{ohm}$ and $25.17 \mathrm{ohm}$ at $20^{\circ} \mathrm{C}$ and $35^{\circ} \mathrm{C}$ respectively. What is the temperature coefficient of resistances?

1 $4.545 \times 10^{-4} /{ }^{\circ} \mathrm{C}$
2 $4.545 \times 10^{-3} /{ }^{\circ} \mathrm{C}$
3 $4.545 \times 10^{-2} /{ }^{\circ} \mathrm{C}$
4 $4.545 \times 10^{-5} /{ }^{\circ} \mathrm{C}$
J and K-CET-2012
Current Electricity

152017 The carbon resistor has the colour band sequence of green, orange, blue and silver. The of resistance will be

1 $64 \times 10^{7} \pm 20 \% \Omega$
2 $53 \times 10^{6} \pm 20 \% \Omega$
3 $64 \times 10^{7} \pm 10 \% \Omega$
4 $53 \times 10^{6} \pm 10 \% \Omega$
J and K-CET-2015
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Current Electricity

152012 A $1 \mathrm{~m}$ long wire of diameter of $0.31 \mathrm{~mm}$ has a resistance of $4.2 \mathrm{ohms}$. If it is replaced by another wire of same material of length $1.5 \mathrm{~m}$ and diameter $0.155 \mathrm{~mm}$, the resistance of wire is

1 $25.2 \mathrm{ohms}$
2 $0.6 \mathrm{ohms}$
3 $26.7 \mathrm{ohms}$
4 $0.8 \mathrm{ohms}$
J and K-CET-2013
Current Electricity

152013 24 Cells of emf $1.5 \mathrm{~V}$ each having internal resistance of $1 \mathrm{ohm}$ are connected to an external resistance of $1.5 \mathrm{ohms}$. To get maximum current

1 all cells are connected in series combination
2 all cells are connected in parallel combination
3 4 cells in each row are connected in series and 6 such rows are connected in parallel
4 6 cells in each row are connected in series and 4 such rows are connected in parallel
J and K-CET-2013
Current Electricity

152014 A coil has resistance $25.00 \mathrm{ohm}$ and $25.17 \mathrm{ohm}$ at $20^{\circ} \mathrm{C}$ and $35^{\circ} \mathrm{C}$ respectively. What is the temperature coefficient of resistances?

1 $4.545 \times 10^{-4} /{ }^{\circ} \mathrm{C}$
2 $4.545 \times 10^{-3} /{ }^{\circ} \mathrm{C}$
3 $4.545 \times 10^{-2} /{ }^{\circ} \mathrm{C}$
4 $4.545 \times 10^{-5} /{ }^{\circ} \mathrm{C}$
J and K-CET-2012
Current Electricity

152017 The carbon resistor has the colour band sequence of green, orange, blue and silver. The of resistance will be

1 $64 \times 10^{7} \pm 20 \% \Omega$
2 $53 \times 10^{6} \pm 20 \% \Omega$
3 $64 \times 10^{7} \pm 10 \% \Omega$
4 $53 \times 10^{6} \pm 10 \% \Omega$
J and K-CET-2015
For More Updates join with Us
Current Electricity

152012 A $1 \mathrm{~m}$ long wire of diameter of $0.31 \mathrm{~mm}$ has a resistance of $4.2 \mathrm{ohms}$. If it is replaced by another wire of same material of length $1.5 \mathrm{~m}$ and diameter $0.155 \mathrm{~mm}$, the resistance of wire is

1 $25.2 \mathrm{ohms}$
2 $0.6 \mathrm{ohms}$
3 $26.7 \mathrm{ohms}$
4 $0.8 \mathrm{ohms}$
J and K-CET-2013
Current Electricity

152013 24 Cells of emf $1.5 \mathrm{~V}$ each having internal resistance of $1 \mathrm{ohm}$ are connected to an external resistance of $1.5 \mathrm{ohms}$. To get maximum current

1 all cells are connected in series combination
2 all cells are connected in parallel combination
3 4 cells in each row are connected in series and 6 such rows are connected in parallel
4 6 cells in each row are connected in series and 4 such rows are connected in parallel
J and K-CET-2013
Current Electricity

152014 A coil has resistance $25.00 \mathrm{ohm}$ and $25.17 \mathrm{ohm}$ at $20^{\circ} \mathrm{C}$ and $35^{\circ} \mathrm{C}$ respectively. What is the temperature coefficient of resistances?

1 $4.545 \times 10^{-4} /{ }^{\circ} \mathrm{C}$
2 $4.545 \times 10^{-3} /{ }^{\circ} \mathrm{C}$
3 $4.545 \times 10^{-2} /{ }^{\circ} \mathrm{C}$
4 $4.545 \times 10^{-5} /{ }^{\circ} \mathrm{C}$
J and K-CET-2012
Current Electricity

152017 The carbon resistor has the colour band sequence of green, orange, blue and silver. The of resistance will be

1 $64 \times 10^{7} \pm 20 \% \Omega$
2 $53 \times 10^{6} \pm 20 \% \Omega$
3 $64 \times 10^{7} \pm 10 \% \Omega$
4 $53 \times 10^{6} \pm 10 \% \Omega$
J and K-CET-2015
NEET DIGITAL LIBRARY