04. Cells, Internal Resistance and Cell Combination, Thermocouple
« Previous Topic: 03. Kirchhoff's Law and Combination of Resistance Next Topic: 05. Heating Effect of Current (Energy, Power) »
For More Updates join with Us
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
Current Electricity

152602 A tetrahedral is consisting of 6 identical wires as shown in the figure. Each wire is having a resistance of $4 \Omega$. When an ideal cell of emf $5 \mathrm{~V}$ is connected across $A B$ as shown, then current through $O R$ is

1 $4 \mathrm{~A}$
2 $\frac{6}{19} \mathrm{~A}$
3 Zero
4 $1 \mathrm{~A}$
JCECE-2015
Current Electricity

152605 Ten identical cells connected in series are needed to heat a wire of length one meter and radius ' $r$ ' by $10^{\circ} \mathrm{C}$ in time ' $t$ '. How many cells will be required to heat the wire of length two meter of the same radius by the same temperature in time ' $t$ '?

1 20
2 30
3 40
4 10
COMEDK 2013
Current Electricity

152608 A current source drives a current in a coil of resistance $R_{1}$ for a time $t$. The same source drives current in another coil of resistance $R_{2}$ for same time. If heat generated is same, find internal resistance of source.

1 $\frac{R_{1} R_{2}}{R_{1}+R_{2}}$
2 $\mathrm{R}_{1}+\mathrm{R}_{2}$
3 zero
4 $\sqrt{\mathrm{R}_{1} \mathrm{R}_{2}}$
AIIMS-2016
Current Electricity

152610 A potentiometer is connected between $A$ and $B$ and the balance point is obtained at $203.6 \mathrm{~cm}$. when the end of the potentiometer connected to $B$ is shifted to $C$, then the balance point is obtained at $24.6 \mathrm{~cm}$. If now the potentiometer be connected between $B$ and $C$, the balance point will be at

1 $179.0 \mathrm{~cm}$
2 $197.2 \mathrm{~cm}$
3 $212.0 \mathrm{~cm}$
4 $228.0 \mathrm{~cm}$
AIIMS-2010
NEET DIGITAL LIBRARY
Current Electricity

152602 A tetrahedral is consisting of 6 identical wires as shown in the figure. Each wire is having a resistance of $4 \Omega$. When an ideal cell of emf $5 \mathrm{~V}$ is connected across $A B$ as shown, then current through $O R$ is

1 $4 \mathrm{~A}$
2 $\frac{6}{19} \mathrm{~A}$
3 Zero
4 $1 \mathrm{~A}$
JCECE-2015
Current Electricity

152605 Ten identical cells connected in series are needed to heat a wire of length one meter and radius ' $r$ ' by $10^{\circ} \mathrm{C}$ in time ' $t$ '. How many cells will be required to heat the wire of length two meter of the same radius by the same temperature in time ' $t$ '?

1 20
2 30
3 40
4 10
COMEDK 2013
Current Electricity

152608 A current source drives a current in a coil of resistance $R_{1}$ for a time $t$. The same source drives current in another coil of resistance $R_{2}$ for same time. If heat generated is same, find internal resistance of source.

1 $\frac{R_{1} R_{2}}{R_{1}+R_{2}}$
2 $\mathrm{R}_{1}+\mathrm{R}_{2}$
3 zero
4 $\sqrt{\mathrm{R}_{1} \mathrm{R}_{2}}$
AIIMS-2016
Current Electricity

152610 A potentiometer is connected between $A$ and $B$ and the balance point is obtained at $203.6 \mathrm{~cm}$. when the end of the potentiometer connected to $B$ is shifted to $C$, then the balance point is obtained at $24.6 \mathrm{~cm}$. If now the potentiometer be connected between $B$ and $C$, the balance point will be at

1 $179.0 \mathrm{~cm}$
2 $197.2 \mathrm{~cm}$
3 $212.0 \mathrm{~cm}$
4 $228.0 \mathrm{~cm}$
AIIMS-2010
Join With Us for More Updates
Current Electricity

152602 A tetrahedral is consisting of 6 identical wires as shown in the figure. Each wire is having a resistance of $4 \Omega$. When an ideal cell of emf $5 \mathrm{~V}$ is connected across $A B$ as shown, then current through $O R$ is

1 $4 \mathrm{~A}$
2 $\frac{6}{19} \mathrm{~A}$
3 Zero
4 $1 \mathrm{~A}$
JCECE-2015
Current Electricity

152605 Ten identical cells connected in series are needed to heat a wire of length one meter and radius ' $r$ ' by $10^{\circ} \mathrm{C}$ in time ' $t$ '. How many cells will be required to heat the wire of length two meter of the same radius by the same temperature in time ' $t$ '?

1 20
2 30
3 40
4 10
COMEDK 2013
Current Electricity

152608 A current source drives a current in a coil of resistance $R_{1}$ for a time $t$. The same source drives current in another coil of resistance $R_{2}$ for same time. If heat generated is same, find internal resistance of source.

1 $\frac{R_{1} R_{2}}{R_{1}+R_{2}}$
2 $\mathrm{R}_{1}+\mathrm{R}_{2}$
3 zero
4 $\sqrt{\mathrm{R}_{1} \mathrm{R}_{2}}$
AIIMS-2016
Current Electricity

152610 A potentiometer is connected between $A$ and $B$ and the balance point is obtained at $203.6 \mathrm{~cm}$. when the end of the potentiometer connected to $B$ is shifted to $C$, then the balance point is obtained at $24.6 \mathrm{~cm}$. If now the potentiometer be connected between $B$ and $C$, the balance point will be at

1 $179.0 \mathrm{~cm}$
2 $197.2 \mathrm{~cm}$
3 $212.0 \mathrm{~cm}$
4 $228.0 \mathrm{~cm}$
AIIMS-2010
For More Updates join with Us
Current Electricity

152602 A tetrahedral is consisting of 6 identical wires as shown in the figure. Each wire is having a resistance of $4 \Omega$. When an ideal cell of emf $5 \mathrm{~V}$ is connected across $A B$ as shown, then current through $O R$ is

1 $4 \mathrm{~A}$
2 $\frac{6}{19} \mathrm{~A}$
3 Zero
4 $1 \mathrm{~A}$
JCECE-2015
Current Electricity

152605 Ten identical cells connected in series are needed to heat a wire of length one meter and radius ' $r$ ' by $10^{\circ} \mathrm{C}$ in time ' $t$ '. How many cells will be required to heat the wire of length two meter of the same radius by the same temperature in time ' $t$ '?

1 20
2 30
3 40
4 10
COMEDK 2013
Current Electricity

152608 A current source drives a current in a coil of resistance $R_{1}$ for a time $t$. The same source drives current in another coil of resistance $R_{2}$ for same time. If heat generated is same, find internal resistance of source.

1 $\frac{R_{1} R_{2}}{R_{1}+R_{2}}$
2 $\mathrm{R}_{1}+\mathrm{R}_{2}$
3 zero
4 $\sqrt{\mathrm{R}_{1} \mathrm{R}_{2}}$
AIIMS-2016
Current Electricity

152610 A potentiometer is connected between $A$ and $B$ and the balance point is obtained at $203.6 \mathrm{~cm}$. when the end of the potentiometer connected to $B$ is shifted to $C$, then the balance point is obtained at $24.6 \mathrm{~cm}$. If now the potentiometer be connected between $B$ and $C$, the balance point will be at

1 $179.0 \mathrm{~cm}$
2 $197.2 \mathrm{~cm}$
3 $212.0 \mathrm{~cm}$
4 $228.0 \mathrm{~cm}$
AIIMS-2010