In the circuit shown here, E1 = E2 = E3 = 2 V and R1 = R2 = 4 ohms. The current flowing between points A and B through battery E2 is
|
(a) Zero |
(b) 2 amp from A to B |
|
(c) 2 amp from B to A |
(d) None of the above |
(b) 2 amp from A to B
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When an unpolarized light of intensity 
is incident on a polarizing sheet, the intensity of the light which does not get transmitted is
|
(a) Zero |
(b) |
(c) |
(d) |
The e.m.f. of a standard cell balances across 150 cm length of a wire of potentiometer. When a resistance of 2 Ω is connected as a shunt with the cell, the balance point is obtained at 100 cm. The internal resistance of the cell is
|
(a) 0.1 Ω |
(b) 1 Ω |
(c) 2 Ω |
(d) 0.5 Ω |
Assertion : Fragments produced in the fission of 
are radioactive.
Reason : The fragments have abnormally high proton to neutron ratio.
|
(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. |
Assertion : The temperature coefficient of resistance is positive for metals and negative for p-type semiconductor.
Reason : The effective charge carriers in metals are negatively charged whereas in p-type semiconductor they are positively charged.
|
(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. |
