- AHCl
- BH2O
- CBoth a and b
- DH2
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Time period of a freely suspended magnet does not depend upon
| (a) Length of the magnet |
| (b) Pole strength of the magnet |
| (c) Horizontal component of earth's magnetic field |
| (d) Length of the suspension thread |
The resistor of resistance 'R' is connected to 25 V supply and heat produced in it is 25 J/sec. The value of R is
|
(a) 225 Ω |
(b) 1 Ω |
(c) 25 Ω |
(d) 50 Ω |
The angle of dip is the angle
|
(a) Between the vertical component of earth's magnetic field and magnetic meridian |
|
(b) Between the vertical component of earth's magnetic field and geographical meridian |
|
(c) Between the earth's magnetic field direction and horizontal direction |
|
(d) Between the magnetic meridian and the geographical meridian |
ABC is a right angled triangle in which AB = 3 cm and BC = 4 cm. And Ð ABC = p/2. The three charges +15, +12 and -20 e.s.u. are placed respectively on A, B and C. The force acting on B is
|
(a) 125 dynes |
(b) 35 dynes |
(c) 25 dynes |
(d) Zero |
In the given circuit if point C is connected to the earth and a potential of +2000 V is given to the point A, the potential at B is
|
(a) 1500 V |
(b) 1000 V |
(c) 500 V |
(d) 400 V |
Assertion : When a magnet is brought near iron nails, only translatory force act on it.
Reason : The field due to a magnet is generally uniform.
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |