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Q. No.The shape of \(V\) vs \(I\) graph for an ohmic conductor is:
1. parabola
2. straight line
3. hyperbola
4. none of these
Subtopic: Derivation of Ohm's Law |
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Level 1: 80%+
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The resistance of the conductor of unit length and unit area of cross-section is called:
1. conductance
2. capacitance
3. specific resistance
4. conductivity
1. conductance
2. capacitance
3. specific resistance
4. conductivity
Subtopic: Derivation of Ohm's Law |
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Level 1: 80%+
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A meter bridge works on the principle of:
| 1. | Balanced Wheatstone bridge |
| 2. | Kirchhoff's voltage law |
| 3. | Kirchhoff's current law |
| 4. | Principle of superposition |
Subtopic: Meter Bridge |
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Level 1: 80%+
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Choose the correct statement regarding meter bridge:
| 1. | A meter bridge works on the principle of null deflection. |
| 2. | The meter bridge usually consists of a wire of length 1 m and a uniform cross-sectional area. |
| 3. | The meter bridge is used for the precise measurement of low resistance. |
| 4. | All of these |
Subtopic: Meter Bridge |
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In a meter bridge, there are two unknown resistance \(R_1\) and \(R_2\). The ratio of \(R_1\) and \(R_2\), if the galvanometer shows a null deflection at 30 cm from one end:
1. \(2:7\)
2. \(5:4\)
3. \(3:7\)
4. \(2:9\)
1. \(2:7\)
2. \(5:4\)
3. \(3:7\)
4. \(2:9\)
Subtopic: Meter Bridge |
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Level 1: 80%+
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For the given \(V-I\) graphs it can be concluded that:
1. \(R_1>R_2>R_3 \)
2. \(R_1<R_2>R_3 \)
3. \(R_1=R_2=R_3 \)
4. \(R_3>R_2>R_1\)
1. \(R_1>R_2>R_3 \)
2. \(R_1<R_2>R_3 \)
3. \(R_1=R_2=R_3 \)
4. \(R_3>R_2>R_1\)
Subtopic: Derivation of Ohm's Law |
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Level 1: 80%+
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Ammeter and voltmeter readings were recorded as \(0.5~\text{A}\) and \(1~\text{V}\) during the experiment to determine the resistance of a given wire using Ohm's law. The correct value of the resistance is:
1. \(1 ~\Omega\)
2. \(10.5~ \Omega\)
3. \(2 ~\Omega\)
4. \(4.5~ \Omega\)
1. \(1 ~\Omega\)
2. \(10.5~ \Omega\)
3. \(2 ~\Omega\)
4. \(4.5~ \Omega\)
Subtopic: Derivation of Ohm's Law |
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The resistance of a wire depends on:
| 1. | length of the wire |
| 2. | area of cross-section of the conductor |
| 3. | nature of material and temperature across the conductor |
| 4. | All of these |
Subtopic: Derivation of Ohm's Law |
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The resistance of a conductor increases with an increase in:
1. current
2. potential difference
3. temperature
4. both (1) and (2)
1. current
2. potential difference
3. temperature
4. both (1) and (2)
Subtopic: Heating Effects of Current |
79%
Level 2: 60%+
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The Ohm's law for a metallic conductor can be represented by:
1. \(\frac{\text { potential difference }}{\text { current }}=\text{resistance} \)
2. \( \text{current} = \text{resistance} \times \text{potential difference} \)
3. \(\text{current} =\frac{\text { resistance }}{\text { potential difference }} \)
4. \(\text{Both}~ (2)~ \text{and} ~(3)\)
1. \(\frac{\text { potential difference }}{\text { current }}=\text{resistance} \)
2. \( \text{current} = \text{resistance} \times \text{potential difference} \)
3. \(\text{current} =\frac{\text { resistance }}{\text { potential difference }} \)
4. \(\text{Both}~ (2)~ \text{and} ~(3)\)
Subtopic: Derivation of Ohm's Law |
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