1. A
   Neither A nor B
2. B
   Only A
3. C
   Only B
4. D
   Both A and B

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1. A
   Magnetic lines of force are far away from each other in a straight wire that has no poles.
2. B
   Magnetic lines of force closed continuous curves.
3. C
   No two magnetic lines of force can intersect each other.
4. D
   Magnetic lines of force start from the North Pole and end on the South Pole.

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1. A
   The direction of the magnetic field at a point is taken to be the direction in which the north pole of a magnetic compass needle points
2. B
   If magnetic field lines are parallel and equidistant, they represent zero - field strength
3. C
   Magnetic field lines are closed curves
4. D
   The relative strength of the magnetic field is shown by the degree of closeness of the field lines

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1. A
   A and C
2. B
   B, B, C and D
3. C
   B and D
4. D
   A, B and C

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1. A
   D (All of these)
2. B
   C
3. C
   A
4. D
   B

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1. A
   B and C
2. B
   A and B
3. C
   C and D
4. D
   A, B, C and D

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1. A
   Statement (1) is incorrect.
2. B
   Statement (d) is incorrect.
3. C
   Statement (b) is incorrect.
4. D
   Statement (c) is incorrect.

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1. A
   Statement (1) is incorrect.
2. B
   Statement (2) is incorrect.
3. C
   Statement (3) is incorrect.
4. D
   Statement (4) is incorrect.

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1. A
   The difference between the direct and alternating currents is that the direct current always flows in one direction, whereas the alternating current reverses its direction periodically
2. B
   Fleming's right - hand rule is a simple rule to know the direction of induced current
3. C
   The right - hand thumb rule is used to find the direction of magnetic fields due to current carrying conductors
4. D
   In India, the AC changes direction after every $\dfrac{1}{50}$ second

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1. A
   Tungsten
2. B
   Iron
3. C
   Silver
4. D
   Nichrome

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1. A
   Parabolic
2. B
   Straight
3. C
   Circular
4. D
   Elliptical

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1. A
   $4F$
2. B
   $\frac{F}{2}$
3. C
   $\frac{2F}{4}$
4. D
   $2F$

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1. A
   $45\pi\times10^{-7}\,\text{T m A}^{-1}$
2. B
   $45\pi\times10^{-3}\,\text{T mA}^{-1}$
3. C
   $45\pi\times10^{-5}\,\text{T mA}^{-1}$
4. D
   $45\pi\times10^{-2}\,\text{T mA}^{-1}$

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1. A
   momentum
2. B
   speed
3. C
   acceleration
4. D
   mass

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1. A
   Current only
2. B
   Distance of the point from the wire only
3. C
   Current, length and distance of the wire
4. D
   Length of the wire only

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1. A
   Fleming's left hand rule
2. B
   Fleming's right hand rule
3. C
   Maxwell's right hand grip rule
4. D
   Left hand thumb rule

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1. A
   An overload as well as short circuit.
2. B
   A short circuit but not due to overload.
3. C
   An overload but not due to short circuit.
4. D
   Neither an overload nor a short circuit.

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1. A
   Is zero
2. B
   Decrease as we move towards its end
3. C
   Is the same at all points
4. D
   Increase as we move towards it end

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1. A
   Induced current will start flowing
2. B
   No effect on the circular coil.
3. C
   No effect of magnetic field.
4. D
   No current will flow in the circuit.

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1. A
   Direction of current
2. B
   Direction of momentum
3. C
   Direction of field lines
4. D
   Direction of force

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1. A
   more at the ends than at the centre
2. B
   found to increase from one end to the other
3. C
   the minimum in the middle
4. D
   same at all points

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1. A
   Electro magnetic Induction
2. B
   Electric field
3. C
   Electricity
4. D
   Magnetic field

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1. A
   23.34 A
2. B
   36.36 A
3. C
   14.6 A
4. D
   9.06 A

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1. A
   A.C. generator
2. B
   Solenoid
3. C
   Cartesian coordinate system
4. D
   D.C. motor

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1. A
   $H_1 > H_2$
2. B
   $H_1 < H_2$
3. C
   $H_1 \neq H_2$
4. D
   $H_1 = H_2$

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