Null voltage refers to no voltage. There are instruments like Wheatstone Bridge that need zero reading which is achieved through null voltage.
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What Is Null Voltage?
CBSE CLASS XII Related Questions
1.
A rectangular loop of size 5 cm $\times$ 8 cm is lying in the $x$-$y$ plane in a uniform magnetic field $\vec{B} = (2.0\ \text{T})\hat{k}$. The total magnetic flux linked with the loop is:
- 80 Wb
- 16 Wb
- \(8 \times 10^{-2}\) Wb
- \(8 \times 10^{-3}\) Wb
2.
A magnet held vertically, with its north pole down, is dropped along the axis of a closed solenoid placed vertically on a table. If the observer looks down from the top,
- the induced current will flow in the anticlockwise direction.
- the induced current will flow in the clockwise direction.
- no induced current will flow in the solenoid.
- the magnet will fall with a constant velocity.
3.
In a region, the electric potential varies as \(V = 10 - 50x\), where \(V\) is in volts and \(x\) is in meters. The electric field in the region is- \(10\ \text{N/C}\) along \(+x\)
- \(10\ \text{N/C}\) along \(-x\)
- \(50\ \text{N/C}\) along \(+x\)
- \(50\ \text{N/C}\) along \(-x\)
4.
A current of \(4.0\,\text{A}\) flows through a wire of length \(1\,\text{m}\) and cross-sectional area \(1.0\,\text{mm}^2\), when a potential difference of \(2\,\text{V}\) is applied across its ends. Calculate the resistivity of the material of the wire.5.
Draw the plot of potential energy of a pair of nucleons as a function of their separation. Write two important conclusions that can be drawn from this plot.6.
Consider the nuclear reaction \( X \to Y + Z \). Let \( M_x \), \( M_y \), and \( M_z \) be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?- \( (M_x - M_z)<M_y \)
- \( (M_x - M_y)<M_z \)
- \( M_x>(M_y + M_z) \)
- \( M_x<(M_y + M_z) \)
Similar Physics Concepts
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