1
WB JEE 2008
+1
-0.25

Lenz's law of electromagnetic induction corresponds to the

A
law of conservation of charge
B
law of conservation of energy
C
law of conservation of momentum
D
law of conservation of angular momentum
2
WB JEE 2023
+1
-0.25 The electric field of a plane electromagnetic wave of wave number k and angular frequency $$\omega$$ is given $$\vec{E}=E_{0}(\hat{i}+\hat{j}) \sin (k z-\omega t)$$. Which of the following gives the direction of the associated magnetic field $$\vec{B}$$ ?

A
$$\hat{\mathrm{k}}$$
B
$$-\hat{i}+\hat{j}$$
C
$$-\hat{i}-\hat{j}$$
D
$$\hat{i}-\hat{k}$$
3
WB JEE 2023
+1
-0.25 A charged particle in a uniform magnetic field $$\vec{B}=B_{0} \hat{k}$$ starts moving from the origin with velocity $$v=3 \hat{\mathrm{i}}+4 \hat{\mathrm{k}} ~\mathrm{m} / \mathrm{s}$$. The trajectory of the particle and the time $$t$$ at which it reaches $$2 \mathrm{~m}$$ above $$\mathrm{x}-\mathrm{y}$$ plane are,

A
Circular path $$1 / 2 ~\mathrm{sec}$$.
B
Helical path, $$1 / 2$$ sec.
C
Circular path, $$2 / 3 ~\mathrm{sec}$$.
D
Helidatpath, $$2 / 3 ~\mathrm{sec}$$.
4
WB JEE 2023
+1
-0.25  A circular coil is placed near a current carrying conductor, both lying on the plane of the paper. The current is flowing through the conductor in such a way that the induced current in the loop is clockwise as shown in the figure. The current in the wire is,

A
time dependent and downward.
B
C
time dependent and upward.
D
An alternating current.
WB JEE Subjects
Physics
Mechanics
Electricity
Optics
Modern Physics
Chemistry
Physical Chemistry
Inorganic Chemistry
Organic Chemistry
Mathematics
Algebra
Trigonometry
Coordinate Geometry
Calculus
EXAM MAP
Medical
NEET