- AScalar quantity
- BVector quantity
- CTensor quantity
- DQuantity that has properties of both scalar and vector
Explanation:
A scalar quantity is a quantity with magnitude only but no direction. But a vector quantity possesses both magnitude and direction. An electric field has a very specific direction (away from a positive charge or towards a negative charge). Hence electric field is a vector quantity. Moreover, we have to use a vector addition for adding two electric fields.
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A transformer is employed to
|
(a) Obtain a suitable dc voltage |
(b) Convert dc into ac |
|
(c) Obtain a suitable ac voltage |
(d) Convert ac into dc |
Optical fibres are related with
|
(a) Communication |
(b) Light |
(c) Computer |
(d) None of these |
Two infinitely long parallel wires carry equal current in same direction. The magnetic field at a mid point in between the two wires is
|
(a) Twice the magnetic field produced due to each of the wires |
|
(b) Half of the magnetic field produced due to each of the wires |
|
(c) Square of the magnetic field produced due to each of the wires |
|
(d) Zero |
In a sample of radioactive material, what percentage of the initial number of active nuclei will decay during one mean life
|
(a) 69.3% |
(b) 63% |
(c) 50% |
(d) 37% |
$\text{v}\geq\text{v}_0$
$\text{v}>2\text{v}_0$
$\text{v}<\text{v}_0$
$\text{v}<\frac{\text{v}_0}{2}$
The electric field between the plates of a parallel plate capacitor when connected to a certain battery I . If the space between the plates of the capacitor is filled by introducing a material of dielectric constant K without disturbing the battery connections, the field between the plates shall be
|
(a) |
(b) |
(c) |
(d) None of the above |