Lenz's Law
Trending Questions
Q. proof the law of conservation of energy
Q.
A wire is bent to form the double loop shown in the figure.
There is a uniform magnetic field directed into the plane of the loop. If the magnitude of this field is decreasing, the current will flow from
to and to
to and to
to and to
to and to
Q. The ratio of energy flux and momentum density
Q. The equation of continuity is based on law of conservation of
Q. A vertical bar magnet is dropped from position on the axis of a fixed metallic coil as shown in fig-I. In fig-II the magnet is fixed and horizontal coil is dropped. The acceleration of the magnet and coil are a1 and a2 respectively then
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/823691/original_16q.png)
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/823691/original_16q.png)
- a1<g, a2>g
- a1>g, a2>g
- a1<g, a2<g
- a1>g, a2<g
Q. Two identical coaxial circular loops carry current i each circulating in the clockwise direction. If the loops are approaching each other, then:
- The net current in each loop increases.
- The net current in each loop remains the same.
- The net current in each loop decreases.
- The net current in one loop increases but it decreases in the other.
Q. Lenz's law is consequence of the law of conservation of
- Charge
- Momentum
- Mass
- Energy
Q. A graph between current and time during charging of a capacitor by a battery in series with a resistor is shown. The graphs are drawn for two circuits. Here R1, R2, C1, C2 and V1, V2 are the values of resistances, capacitances and EMF of cells in the two circuits. If only two parameters out of resistance, capacitance, emf are different in two circuits. What will be the correct option?
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1293851/original_5.png)
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1293851/original_5.png)
Q. A conductor PQ of length b carries a current i2 is placed perpendicular to a long conductor XY carrying a current i1 as shown in figure. The magnitude and direction of the magnetic force acting on PQ is
Both the conductors are in xy−plane.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1385113/original_2.png)
Both the conductors are in xy−plane.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1385113/original_2.png)
Q. the fundamental units in the two system of units are in the ratio of 1:3. find the ratio of units of momentum and power