1
NEET 2023
MCQ (Single Correct Answer)
+4
-1

The resistance of platinum wire at $$0^{\circ} \mathrm{C}$$ is $$2 ~\Omega$$ and $$6.8 ~\Omega$$ at $$80^{\circ} \mathrm{C}$$. The temperature coefficient of resistance of the wire is :

A
$$3 \times 10^{-3} \mathrm{C}^{-1}$$
B
$$3 \times 10^{-2} \mathrm{C}^{-1}$$
C
$$3 \times 10^{-10} \mathrm{C}^{-1}$$
D
$$3 \times 10^{-4} \mathrm{C}^{-1}$$
2
NEET 2023
MCQ (Single Correct Answer)
+4
-1

10 resistors, each of resistance $$\mathrm{R}$$ are connected in series to a battery of emf $$E$$ and negligible internal resistance. Then those are connected in parallel to the same battery, the current is increased $$n$$ times. The value of $$n$$ is :

A
100
B
1
C
1000
D
10
3
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1

The reciprocal of resistance is :

A
conductance
B
reactance
C
mobility
D
conductivity
4
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1

The distance between the two plates of a parallel plate capacitor is doubled and the area of each plate is halved. If C is its initial capacitance, its final capacitance is equal to

A
$${C \over 4}$$
B
2C
C
$${C \over 2}$$
D
4C
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