- APositive direction of Y-axis.
- BNegative direction of Y-axis.
- CPositive direction of Z-axis.
- DNegative direction of Z-axis.
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In sum and difference method in vibration magnetometer, the time period is more if
| (a) Similar poles of both magnets are on same sides |
| (b) Opposite poles of both magnets are on same sides |
| (c) Both magnets are perpendicular to each other |
| (d) Nothing can be said |
A current of 1 mA is flowing through a copper wire. How many electrons will pass a given point in one second [e = 1.6 × 10–19 Coulomb]
|
(a) 6.25 × |
(b) 6.25 × |
(c) 6.25 × |
(d) 6.25 × |
Find VAB

|
(a) 10 V |
(b) 20 V |
(c) 30 V |
(d) None of these |
A slit of width a is illuminated by white light. For red light (λ = 6500 Å), the first minima is obtained at θ = 30°. Then the value of a will be
|
(a) 3250 Å |
(b) 6.5 |
(c) 1.24 microns |
(d) 2.6 |
How much work is required to carry a 6 mC charge from the negative terminal to the positive terminal of a 9 V battery
|
(a) 54 × |
(b) 54 × |
(c) 54 × |
(d) 54 × |
Lamps used for household lighting are connected in
|
(a) Series |
(b) Parallel |
(c) Mixed circuit |
(d) None of the above |
Which of the following transition will have highest emission wavelength
|
(a) n = 2 to n = 1 |
(b) n = 1 to n = 2 |
(c) n = 2 to n= 5 |
(d) n = 5 to n = 2 |