Magnetic induction is a
|
(a) Scalar quantity |
(b) Vector quantity |
(c) Both (a) and (b) |
(d) None of the above |
Magnetic induction is a
|
(a) Scalar quantity |
(b) Vector quantity |
(c) Both (a) and (b) |
(d) None of the above |
(b) Vector quantity
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A straight wire of diameter 0.5 mm carrying a current of 1 A is replaced by another wire of 1 mm diameter carrying the same current. The strength of magnetic field far away is
|
(a) Twice the earlier value |
(b) Half of the earlier value |
|
(c) Quarter of its earlier value |
(d) Unchanged |
Work of electric motor is
|
(a) To convert ac into dc |
(b) To convert dc into ac |
|
(c) Both (a) and (b) |
(d) To convert ac into mechanical work |
In the disintegration series the values of Z and A respectively will be
|
(a) 92, 236 |
(b) 88, 230 |
(c) 90, 234 |
(d) 91, 234 |
Two resistors are connected (a) in series (b) in parallel. The equivalent resistance in the two cases are 9 ohm and 2 ohm respectively. Then the resistances of the component resistors are
|
(a) 2 ohm and 7 ohm |
(b) 3 ohm and 6 ohm |
(c) 3 ohm and 9 ohm |
(d) 5 ohm and 4 ohm |