## Q1 If a charge particle moves perpendicular to a magnetic field, then, which of the following is true

• (a) Speed of the particle is changed.
• (b) Speed of the particle remains unchanged.
• (c) Direction of the particle remains unchanged.
• (d) Acceleration of the particle remains unchanged.

• (b) Speed of the particle remains unchanged.

## Q2 The path of an electron in a uniform magnetic field may be

• (a) Circular but not helical
• (b) Helical but not circular
• (c) Neither helical nor circular
• (d) Either helical or circular

• (d) Either helical or circular

## Q3  Direction of magnetic field due to a current carrying circular coil can be determined by which rule?

• (a) Right hand thumb  rule
• (b) Right hand Rule
• (c) Left  hand rule
• (d) All of these

• (a) Right hand thumb  rule

## Q4 An electric charge 'q' moves with a constant velocity 'v' parallel to the  uniform magnetic field 'B' , then force experienced by the charge is :

• (a) qvB
• (b) B/qV
• (c) Zero
• (d) qv/B

• (c) Zero; Force on a charged particle moving in magnetic field is qvBsinθ as charge is moving parallel θ =0 therefore F=0

• (a) True
• (b) False

• a)True

• (a) True
• (b) False

• (a) True

• (a) True
• (b) False

• (a) True

## Q8 The force is maximum, when the charge move ......... to the direction of magnetic field.

• (a) 90^{0}
• (b) 45^{0}
• (c) parallel
• (d) All of these

• 90^{0} ;   F = qvB Sinθ ,θ =90^{0} , F will be maximum

## Q9.  Path of a charge moving inside a magnetic field in transverse direction will be

• (a) Circular
• (b) Rectangular
• (c) Straight line
• (d)  Parabolic

• a) Circular

## Q10 If a  charged particle  moves inside the magnetic field , magnitude of which quantity is not effected by the magnetic field

• (a) Force
• (b) Velocity
• (c) Frequency
• (d) Time period

• (b) Velocity

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