If the graph is drawn between the electric field (due to an infinite long
wire) and position r of the point, it will be (a) Parabola (b) Straight line
with positive slope (c) straight line with negative slope (d) circle11. Which of the following materials has the least magnetic susceptibility?
(a) Cobalt (b) Copper (c) Platinum (d) Aluminium
12. A circular coil of radius 5 cm and 50 turns carries a current of 3
ampere. The magnetic dipole moment of the coil is nearly
(a) 1.0 A m2 (b) 1.2 A m2 (c) 0.5 A m2 (d) 0.8 A m2
13. The temperature coefficient of resistance of a wire is 0.00125 per °C.
At 20°C, its resistance is 1 Ω. The resistance of the wire will be 2 Ω at
a) 800 °C b) 700 °C c) 850 °C d) 820 °C
14. The vertical component of Earth’s magnetic field at a place is equal to
the horizontal component. What is the value of angle of dip at this place?
(a) 30° (b) 45° (c) 60° (d) 90°
15. An inductor 20 mH, a capacitor 50 μF and a resistor 40 Ω are
connected in series across a source of emf V = 10 sin 340 t. The power
loss in AC circuit is
(a) 0.76 W (b) 0.89 W (c) 0.46 W (d) 0.67 W
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sorry I didn't have points please ask your questions tomorrow bye
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