357230
The ammeter \(A\) reads 2 \(A\) and the voltmeter \(V\) reads 20 \(V\). The value of resistance \(R\) is (Assuming finite resistance’s of ammeter and voltmeter)
1 Less than 10 \(ohm\)
2 Exactly 10 \(ohm\)
3 More than 10 \(ohm\)
4 We cannot definitely say
Explanation:
The current distribution is shown in the figure. Given that \(\left( {2 - i} \right)R = 20\,V\quad \Rightarrow R = \frac{{20}}{{2 - i}}\) As \(i\, > \,{\kern 1pt} 0\,\; \Rightarrow R\) slightly greater than \(10\Omega \)
PHXII03:CURRENT ELECTRICITY
357231
Among the following the true statement is,
1 Ammeter is a high resistance galvanometer and voltmeter is a low resistance galvanometer.
2 Ammeter is a low resistance galvanometer and voltmeter is a high resistance galvanometer.
3 Ammeter and voltmeter cannot be distinguished on the basis of their resistance.
4 Ammeter and voltmeter have same resistance.
Explanation:
Option (2) is correct
PHXII03:CURRENT ELECTRICITY
357232
In the circuits shown below, the readings of the voltmeters and the ammeters will be
For ideal voltmeter, resistance is infinite and for the ideal ammeter, resistance is zero \({V_1} = {i_1} \times 10 = \frac{{10}}{{10}} \times 10 = 10\,{\rm{volt}}\) \({V_2} = {i_2} \times 10 = \frac{{10}}{{10}} \times 10 = 10\,{\rm{volt}}\) \({V_1} = {V_2}\) \({i_1} = {i_2} = \frac{{10V}}{{10\,\Omega }} = 1A\)
NEET - 2019
PHXII03:CURRENT ELECTRICITY
357233
An ammeter and a voltmeter of resistance \(R\) are connected in series to an electric cell of negligible internal resistance. Their readings are \(A\) and \(V\) respectively. If another resistance \(R\) is connected in parallel with the voltmeter, then
1 Both \(A\) and \(V\) increases
2 Both \(A\) and \(V\) decreases
3 \(A\) decreases but \(V\) increases
4 \(A\) increases but \(V\) decreases
Explanation:
The current through the circuit is \(i = \frac{\varepsilon }{{{R_A} + R}}\;\; \Rightarrow {V_0} = {i_0}R = \frac{{\varepsilon R}}{{{R_A} + R}}\) After connecting the resistor in parallel \(i = \frac{\varepsilon }{{{R_A} + \frac{R}{2}}}\) \(i = \frac{\varepsilon }{{{R_A} + \frac{R}{2}}}\quad \Rightarrow V = i\left( {\frac{R}{2}} \right) = \frac{{\varepsilon R}}{{2{R_A} + R}}\quad \) \(i > {i_0}\) and \({V_0} > V\)
357230
The ammeter \(A\) reads 2 \(A\) and the voltmeter \(V\) reads 20 \(V\). The value of resistance \(R\) is (Assuming finite resistance’s of ammeter and voltmeter)
1 Less than 10 \(ohm\)
2 Exactly 10 \(ohm\)
3 More than 10 \(ohm\)
4 We cannot definitely say
Explanation:
The current distribution is shown in the figure. Given that \(\left( {2 - i} \right)R = 20\,V\quad \Rightarrow R = \frac{{20}}{{2 - i}}\) As \(i\, > \,{\kern 1pt} 0\,\; \Rightarrow R\) slightly greater than \(10\Omega \)
PHXII03:CURRENT ELECTRICITY
357231
Among the following the true statement is,
1 Ammeter is a high resistance galvanometer and voltmeter is a low resistance galvanometer.
2 Ammeter is a low resistance galvanometer and voltmeter is a high resistance galvanometer.
3 Ammeter and voltmeter cannot be distinguished on the basis of their resistance.
4 Ammeter and voltmeter have same resistance.
Explanation:
Option (2) is correct
PHXII03:CURRENT ELECTRICITY
357232
In the circuits shown below, the readings of the voltmeters and the ammeters will be
For ideal voltmeter, resistance is infinite and for the ideal ammeter, resistance is zero \({V_1} = {i_1} \times 10 = \frac{{10}}{{10}} \times 10 = 10\,{\rm{volt}}\) \({V_2} = {i_2} \times 10 = \frac{{10}}{{10}} \times 10 = 10\,{\rm{volt}}\) \({V_1} = {V_2}\) \({i_1} = {i_2} = \frac{{10V}}{{10\,\Omega }} = 1A\)
NEET - 2019
PHXII03:CURRENT ELECTRICITY
357233
An ammeter and a voltmeter of resistance \(R\) are connected in series to an electric cell of negligible internal resistance. Their readings are \(A\) and \(V\) respectively. If another resistance \(R\) is connected in parallel with the voltmeter, then
1 Both \(A\) and \(V\) increases
2 Both \(A\) and \(V\) decreases
3 \(A\) decreases but \(V\) increases
4 \(A\) increases but \(V\) decreases
Explanation:
The current through the circuit is \(i = \frac{\varepsilon }{{{R_A} + R}}\;\; \Rightarrow {V_0} = {i_0}R = \frac{{\varepsilon R}}{{{R_A} + R}}\) After connecting the resistor in parallel \(i = \frac{\varepsilon }{{{R_A} + \frac{R}{2}}}\) \(i = \frac{\varepsilon }{{{R_A} + \frac{R}{2}}}\quad \Rightarrow V = i\left( {\frac{R}{2}} \right) = \frac{{\varepsilon R}}{{2{R_A} + R}}\quad \) \(i > {i_0}\) and \({V_0} > V\)
NEET Test Series from KOTA - 10 Papers In MS WORD
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PHXII03:CURRENT ELECTRICITY
357230
The ammeter \(A\) reads 2 \(A\) and the voltmeter \(V\) reads 20 \(V\). The value of resistance \(R\) is (Assuming finite resistance’s of ammeter and voltmeter)
1 Less than 10 \(ohm\)
2 Exactly 10 \(ohm\)
3 More than 10 \(ohm\)
4 We cannot definitely say
Explanation:
The current distribution is shown in the figure. Given that \(\left( {2 - i} \right)R = 20\,V\quad \Rightarrow R = \frac{{20}}{{2 - i}}\) As \(i\, > \,{\kern 1pt} 0\,\; \Rightarrow R\) slightly greater than \(10\Omega \)
PHXII03:CURRENT ELECTRICITY
357231
Among the following the true statement is,
1 Ammeter is a high resistance galvanometer and voltmeter is a low resistance galvanometer.
2 Ammeter is a low resistance galvanometer and voltmeter is a high resistance galvanometer.
3 Ammeter and voltmeter cannot be distinguished on the basis of their resistance.
4 Ammeter and voltmeter have same resistance.
Explanation:
Option (2) is correct
PHXII03:CURRENT ELECTRICITY
357232
In the circuits shown below, the readings of the voltmeters and the ammeters will be
For ideal voltmeter, resistance is infinite and for the ideal ammeter, resistance is zero \({V_1} = {i_1} \times 10 = \frac{{10}}{{10}} \times 10 = 10\,{\rm{volt}}\) \({V_2} = {i_2} \times 10 = \frac{{10}}{{10}} \times 10 = 10\,{\rm{volt}}\) \({V_1} = {V_2}\) \({i_1} = {i_2} = \frac{{10V}}{{10\,\Omega }} = 1A\)
NEET - 2019
PHXII03:CURRENT ELECTRICITY
357233
An ammeter and a voltmeter of resistance \(R\) are connected in series to an electric cell of negligible internal resistance. Their readings are \(A\) and \(V\) respectively. If another resistance \(R\) is connected in parallel with the voltmeter, then
1 Both \(A\) and \(V\) increases
2 Both \(A\) and \(V\) decreases
3 \(A\) decreases but \(V\) increases
4 \(A\) increases but \(V\) decreases
Explanation:
The current through the circuit is \(i = \frac{\varepsilon }{{{R_A} + R}}\;\; \Rightarrow {V_0} = {i_0}R = \frac{{\varepsilon R}}{{{R_A} + R}}\) After connecting the resistor in parallel \(i = \frac{\varepsilon }{{{R_A} + \frac{R}{2}}}\) \(i = \frac{\varepsilon }{{{R_A} + \frac{R}{2}}}\quad \Rightarrow V = i\left( {\frac{R}{2}} \right) = \frac{{\varepsilon R}}{{2{R_A} + R}}\quad \) \(i > {i_0}\) and \({V_0} > V\)
357230
The ammeter \(A\) reads 2 \(A\) and the voltmeter \(V\) reads 20 \(V\). The value of resistance \(R\) is (Assuming finite resistance’s of ammeter and voltmeter)
1 Less than 10 \(ohm\)
2 Exactly 10 \(ohm\)
3 More than 10 \(ohm\)
4 We cannot definitely say
Explanation:
The current distribution is shown in the figure. Given that \(\left( {2 - i} \right)R = 20\,V\quad \Rightarrow R = \frac{{20}}{{2 - i}}\) As \(i\, > \,{\kern 1pt} 0\,\; \Rightarrow R\) slightly greater than \(10\Omega \)
PHXII03:CURRENT ELECTRICITY
357231
Among the following the true statement is,
1 Ammeter is a high resistance galvanometer and voltmeter is a low resistance galvanometer.
2 Ammeter is a low resistance galvanometer and voltmeter is a high resistance galvanometer.
3 Ammeter and voltmeter cannot be distinguished on the basis of their resistance.
4 Ammeter and voltmeter have same resistance.
Explanation:
Option (2) is correct
PHXII03:CURRENT ELECTRICITY
357232
In the circuits shown below, the readings of the voltmeters and the ammeters will be
For ideal voltmeter, resistance is infinite and for the ideal ammeter, resistance is zero \({V_1} = {i_1} \times 10 = \frac{{10}}{{10}} \times 10 = 10\,{\rm{volt}}\) \({V_2} = {i_2} \times 10 = \frac{{10}}{{10}} \times 10 = 10\,{\rm{volt}}\) \({V_1} = {V_2}\) \({i_1} = {i_2} = \frac{{10V}}{{10\,\Omega }} = 1A\)
NEET - 2019
PHXII03:CURRENT ELECTRICITY
357233
An ammeter and a voltmeter of resistance \(R\) are connected in series to an electric cell of negligible internal resistance. Their readings are \(A\) and \(V\) respectively. If another resistance \(R\) is connected in parallel with the voltmeter, then
1 Both \(A\) and \(V\) increases
2 Both \(A\) and \(V\) decreases
3 \(A\) decreases but \(V\) increases
4 \(A\) increases but \(V\) decreases
Explanation:
The current through the circuit is \(i = \frac{\varepsilon }{{{R_A} + R}}\;\; \Rightarrow {V_0} = {i_0}R = \frac{{\varepsilon R}}{{{R_A} + R}}\) After connecting the resistor in parallel \(i = \frac{\varepsilon }{{{R_A} + \frac{R}{2}}}\) \(i = \frac{\varepsilon }{{{R_A} + \frac{R}{2}}}\quad \Rightarrow V = i\left( {\frac{R}{2}} \right) = \frac{{\varepsilon R}}{{2{R_A} + R}}\quad \) \(i > {i_0}\) and \({V_0} > V\)
