In Rutherford scattering experiment, what will be the correct angle for α scattering for an impact parameter b = 0
|
(a) 90° |
(b) 270° |
(c) 0° |
(d) 180° |
(d) 180°
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Assertion : Torque on the coil is the maximum, when coil is suspended in a radial magnetic field.
Reason : The torque tends to rotate the coil on its own axis.
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |
An ammeter, suspected to give inaccurate reading, is connected in series with a silver voltameter. The ammeter indicates 0.54 A. A steady current passed for one hour deposits 2.0124 gm of silver. If the E.C.E. of silver is 1.118 
, then the error in ammeter reading is
|
(a) + 0.04 A |
(b) + 0.02 A |
(c) – 0.03 A |
(d) – 0.01 A |
Select the correct statement
|
(a) In a full wave rectifier, two diodes work alternately |
|
(b) In a full wave rectifier, two diodes work simultaneously |
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(c) The efficiency of full wave and half wave rectifiers is same |
|
(d) The full wave rectifier is bi-directional |
The effective resistance of two resistors in parallel is 
. If one of the resistors is disconnected the resistance becomes 4 W. The resistance of the other resistor is
|
(a) 4 W |
(b) 3 W |
(c) |
(d) |
Two electric lamps of 40 watt each are connected in parallel. The power consumed by the combination will be
|
(a) 20 watt |
(b) 60 watt
|
(c) 80 watt |
(d) 100 watt |
Angle of dip is 90o at
|
(a) Poles |
(b) Equator |
(c) Both (a) and (b) |
(d) None of these |
