01. Ohm's Law, Resistance, Conductivity and Thermal Dependency of Resistance
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
Current Electricity

151821 A wire of resistance $R_{1}$ is drawn out so that its length is increased by twice of its original length. The ratio of new resistance to original resistance is:

1 $9: 1$
2 $1: 9$
3 $4: 1$
4 $3: 1$
Current Electricity

151822 Given below are two statements:
Statement I : A uniform wire of resistance $80 \Omega$ is cut into four equal parts. These parts are now connected in parallel. The equivalent resistance of the combination will be $5 \Omega$.
Statement II : Two resistance $2 \mathrm{R}$ and $3 \mathrm{R}$ are connected in parallel in a electric circuit. The value of thermal energy developed in $3 R$ and $2 R$ will be in the ratio $3: 2$.
In the light of the above statements, choose the most appropriate answer from the options given below

1 Both statement I and statement II are correct
2 Both statement I and statement II are incorrect
3 Statement I is correct but statement II is incorrect
4 Statement I is incorrect but statement II is correct.
Current Electricity

151823 What will be the most suitable combination of three resistors
$A=2 \Omega, B=4 \Omega, C=6 \Omega \text { so that }\left(\frac{22}{3}\right) \Omega \text { is }$
equivalent resistance of combination?

1 Parallel combination of $\mathrm{A}$ and $\mathrm{C}$ connected in series with B.
2 Parallel combination of A and B connected in series with $\mathrm{C}$.
3 Series combination of A and B connected in series with B.
4 Series combination of B and C connected in parallel with A.
Current Electricity

151824 Two cells of same emf but different internal resistances $r_{1}$ and $r_{2}$ are connected in series with a resistance $R$. The value of resistance $R$, for which the potential difference across second cell is zero, is :

1 $r_{2}-r_{1}$
2 $r_{1}-r_{2}$
3 $r_{1}$
4 $\mathrm{r}_{2}$
Current Electricity

151821 A wire of resistance $R_{1}$ is drawn out so that its length is increased by twice of its original length. The ratio of new resistance to original resistance is:

1 $9: 1$
2 $1: 9$
3 $4: 1$
4 $3: 1$
Current Electricity

151822 Given below are two statements:
Statement I : A uniform wire of resistance $80 \Omega$ is cut into four equal parts. These parts are now connected in parallel. The equivalent resistance of the combination will be $5 \Omega$.
Statement II : Two resistance $2 \mathrm{R}$ and $3 \mathrm{R}$ are connected in parallel in a electric circuit. The value of thermal energy developed in $3 R$ and $2 R$ will be in the ratio $3: 2$.
In the light of the above statements, choose the most appropriate answer from the options given below

1 Both statement I and statement II are correct
2 Both statement I and statement II are incorrect
3 Statement I is correct but statement II is incorrect
4 Statement I is incorrect but statement II is correct.
Current Electricity

151823 What will be the most suitable combination of three resistors
$A=2 \Omega, B=4 \Omega, C=6 \Omega \text { so that }\left(\frac{22}{3}\right) \Omega \text { is }$
equivalent resistance of combination?

1 Parallel combination of $\mathrm{A}$ and $\mathrm{C}$ connected in series with B.
2 Parallel combination of A and B connected in series with $\mathrm{C}$.
3 Series combination of A and B connected in series with B.
4 Series combination of B and C connected in parallel with A.
Current Electricity

151824 Two cells of same emf but different internal resistances $r_{1}$ and $r_{2}$ are connected in series with a resistance $R$. The value of resistance $R$, for which the potential difference across second cell is zero, is :

1 $r_{2}-r_{1}$
2 $r_{1}-r_{2}$
3 $r_{1}$
4 $\mathrm{r}_{2}$
Current Electricity

151821 A wire of resistance $R_{1}$ is drawn out so that its length is increased by twice of its original length. The ratio of new resistance to original resistance is:

1 $9: 1$
2 $1: 9$
3 $4: 1$
4 $3: 1$
Current Electricity

151822 Given below are two statements:
Statement I : A uniform wire of resistance $80 \Omega$ is cut into four equal parts. These parts are now connected in parallel. The equivalent resistance of the combination will be $5 \Omega$.
Statement II : Two resistance $2 \mathrm{R}$ and $3 \mathrm{R}$ are connected in parallel in a electric circuit. The value of thermal energy developed in $3 R$ and $2 R$ will be in the ratio $3: 2$.
In the light of the above statements, choose the most appropriate answer from the options given below

1 Both statement I and statement II are correct
2 Both statement I and statement II are incorrect
3 Statement I is correct but statement II is incorrect
4 Statement I is incorrect but statement II is correct.
Current Electricity

151823 What will be the most suitable combination of three resistors
$A=2 \Omega, B=4 \Omega, C=6 \Omega \text { so that }\left(\frac{22}{3}\right) \Omega \text { is }$
equivalent resistance of combination?

1 Parallel combination of $\mathrm{A}$ and $\mathrm{C}$ connected in series with B.
2 Parallel combination of A and B connected in series with $\mathrm{C}$.
3 Series combination of A and B connected in series with B.
4 Series combination of B and C connected in parallel with A.
Current Electricity

151824 Two cells of same emf but different internal resistances $r_{1}$ and $r_{2}$ are connected in series with a resistance $R$. The value of resistance $R$, for which the potential difference across second cell is zero, is :

1 $r_{2}-r_{1}$
2 $r_{1}-r_{2}$
3 $r_{1}$
4 $\mathrm{r}_{2}$
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
Current Electricity

151821 A wire of resistance $R_{1}$ is drawn out so that its length is increased by twice of its original length. The ratio of new resistance to original resistance is:

1 $9: 1$
2 $1: 9$
3 $4: 1$
4 $3: 1$
Current Electricity

151822 Given below are two statements:
Statement I : A uniform wire of resistance $80 \Omega$ is cut into four equal parts. These parts are now connected in parallel. The equivalent resistance of the combination will be $5 \Omega$.
Statement II : Two resistance $2 \mathrm{R}$ and $3 \mathrm{R}$ are connected in parallel in a electric circuit. The value of thermal energy developed in $3 R$ and $2 R$ will be in the ratio $3: 2$.
In the light of the above statements, choose the most appropriate answer from the options given below

1 Both statement I and statement II are correct
2 Both statement I and statement II are incorrect
3 Statement I is correct but statement II is incorrect
4 Statement I is incorrect but statement II is correct.
Current Electricity

151823 What will be the most suitable combination of three resistors
$A=2 \Omega, B=4 \Omega, C=6 \Omega \text { so that }\left(\frac{22}{3}\right) \Omega \text { is }$
equivalent resistance of combination?

1 Parallel combination of $\mathrm{A}$ and $\mathrm{C}$ connected in series with B.
2 Parallel combination of A and B connected in series with $\mathrm{C}$.
3 Series combination of A and B connected in series with B.
4 Series combination of B and C connected in parallel with A.
Current Electricity

151824 Two cells of same emf but different internal resistances $r_{1}$ and $r_{2}$ are connected in series with a resistance $R$. The value of resistance $R$, for which the potential difference across second cell is zero, is :

1 $r_{2}-r_{1}$
2 $r_{1}-r_{2}$
3 $r_{1}$
4 $\mathrm{r}_{2}$