A metallic resistor is connected across a battery. If the number of collisions of the free electrons with the lattice is somehow decreased in the resistor (for example, by cooling it), the current will:
1. | increase | 2. | decrease |
3. | remain constant | 4. | become zero |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTwo resistors A and B have resistances RA and RB respectively with RA < RB . The resistivities of their materials are ρA and ρB
1. ρA > ρB
2. ρA = ρB
3. ρA < ρB
4. The information is not sufficient to find the relation between ρA and ρB
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe product of resistivity and conductivity of a cylindrical conductor depends on
1. temperature
2. material
3. area of cross-section
4. none of these.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAs the temperature of a metallic resistor is increased, the product of its resistivity and conductivity:
1. | increases |
2. | decreases |
3. | remains constant |
4. | may increase or decrease |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn an electric circuit containing a battery, the charge (assumed positive) inside the battery:
1. | always goes from the positive terminal to the negative terminal. |
2. | may go from the positive terminal to the negative terminal. |
3. | always goes from the negative terminal to the positive terminal. |
4. | does not move. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA resistor of resistance \(R\) is connected to an ideal battery. If the value of \(R\) is decreased, the power dissipated in the resistor will:
1. | increase | 2. | decrease |
3. | remains unchanged | 4. | can't be determined |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA current passes through a resistor. Let K1 and K2 represent the average kinetic energy of the conduction electrons and the metal ions respectively.
1. K1 < K2
2. K1 = K2
3. K1 > K2
4. Any of these three may occur
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTwo resistors \(R\) and \(2R\) are connected in series in an electric circuit. The thermal energy developed in \(R\) and \(2R\) are in the ratio of:
1. \(1:2\)
2. \(2:1\)
3. \(1:4\)
4. \(4:1\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTwo resistances R and 2R are connected in parallel in an electric circuit. The thermal energy developed in R and 2R are in the ratio
1. 1 : 2
2. 2 : 1
3. 1 : 4
4. 4 : 1.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA uniform wire of resistance \(50~\Omega\) \(\) is cut into \(5\) equal parts. These parts are now connected in parallel. The equivalent resistance of the combination is:
1. | \(2~\Omega\) \(\) | 2. | \(10~\Omega\) \(\) |
3. | \(250~\Omega\) \(\) | 4. | \(6250~\Omega\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology