B experience a net clockwise torque.

B experiences a net force along + x axis.

B experiences a net anticlockwise torque.

B experiences a net force along - x axis.

The force acting on a current carrying wire joining two fixed points A and B in a uniform magnetic field

is independent of the shape of the wire

increases exponentially with increase in current

is inversely proportional to the magnitude of the magnetic field

is parallel to the direction of the magnetic field

What is the net force on the square coil?

25 × 10 - 7 N moving towards wire

25 × 10 - 7 N moving away from wire

35 × 10 - 7 N moving towards wire

35 × 10 - 7 N moving away from wire

An electron moving with velocity v → = i ^ v x enters a uniform magnetic field B → = k ^ B z . The electron experiences

a force but its kinetic energy does not change.

a force and its kinetic energy decreases.

a force and its kinetic energy increases.

no force hence kinetic energy does not change.

E M B I B E

Physics Crash Course KCET (UG)>Chapter 25 - Magnetic Effect of Current>Exercise 1>Q 58

EASY

KCET (UG)

IMPORTANT

Earn 100

Which of the following is correct with respect to charge moving across a junction?

50% studentsanswered this correctly

Important Questions on Magnetic Effect of Current

EASY

KCET (UG)

IMPORTANT

Physics Crash Course KCET (UG)>Chapter 25 - Magnetic Effect of Current>Exercise 1>Q 59

A force

F

, acting on an electric charge

q

, in presence of an electromagnetic field, moves the charge parallel to the magnetic field with velocity $v$. Then, $F$ is equal to (where, $E$ and $B$ are electric field and magnetic field, respectively)

EASY

KCET (UG)

IMPORTANT

Physics Crash Course KCET (UG)>Chapter 25 - Magnetic Effect of Current>Exercise 1>Q 60

An electron having a charge

e

moves with a velocity

v

in the

X

-direction. A magnetic field acts on it in the

Y

-direction. The force on the electron acts in

EASY

KCET (UG)

IMPORTANT

Physics Crash Course KCET (UG)>Chapter 25 - Magnetic Effect of Current>Exercise 1>Q 61

A beam consisting of protons and electrons moving at the same speed, goes through a thin region in which there is a magnetic field perpendicular to the beam. The protons and the electrons

EASY

KCET (UG)

IMPORTANT

Physics Crash Course KCET (UG)>Chapter 25 - Magnetic Effect of Current>Exercise 1>Q 62

The electron in the beam of a television tube move horizontally from south to north. The vertical component of the earth's magnetic field points down. The electron is deflected towards,

EASY

KCET (UG)

IMPORTANT

Physics Crash Course KCET (UG)>Chapter 25 - Magnetic Effect of Current>Exercise 1>Q 63

A vertical wire carrying a current in the upward direction is placed in horizontal magnetic field directed towards north. The wire will experience a force directed towards,

EASY

KCET (UG)

IMPORTANT

Physics Crash Course KCET (UG)>Chapter 25 - Magnetic Effect of Current>Exercise 1>Q 64

The direction of lines of force of magnetic field produced by passing direct current through a conductor is determined from,

EASY

KCET (UG)

IMPORTANT

Physics Crash Course KCET (UG)>Chapter 25 - Magnetic Effect of Current>Exercise 1>Q 65

An electron falling freely under gravity enters a region of the uniform horizontal magnetic field pointing north to south. The particle will be deflected towards

EASY

KCET (UG)

IMPORTANT

Physics Crash Course KCET (UG)>Chapter 25 - Magnetic Effect of Current>Exercise 1>Q 66

An electron accelerated by