Question
Which one is in forward bias
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(a)
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(b)
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(c)
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(d) None of these |
✓
Answer
(b)
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Holes are created when:
Assertion : Two electric bulbs of 50 and 100 W are given. When connected in series 50 W bulb glows more but when connected parallel 100 W bulb glows more.
Reason : In series combination, power is directly proportional to the resistance of circuit. But in parallel combination, power is inversely proportional to the resistance of the circuit.
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(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. |
A point P is situated on the axis of an electric dipole at a distance x from its mid-point, the electric potential at point P is proportional to:
The reciprocal of resistance is
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(a) Conductance |
(b) Resistivity |
(c) Voltage |
(d) None of the above |
Direction of induced current is determined by :
When a resistance of 2 ohm is connected across the terminals of a cell, the current is 0.5 A. When the resistance is increased to 5 ohm, the current is 0.25 A. The e.m.f. of the cell is
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(a) 1.0 V |
(b) 1.5 V |
(c) 2.0 V |
(d) 2.5 V |
The heat generated through 2 ohm and 8 ohm resistances separately, when a condenser of 200 μF capacity charged to 200 V is discharged one by one, will be
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(a) 4 J and 16 J respectively |
(b) 16 J and 4 J respectively |
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(c) 4 J and 8 J respectively |
(d) 4 J and 4 J respectively |
Charge on α -particle is
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(a) |
(b) 1.6 |
(c) 3.2 |
(d) 6.4 |
Total flux produced by a source of 1 cd is
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(a) |
(b) 8 |
(c) 4 |
(d) |
Consider the situation shown in figure. If the switch is closed and after some time it is opened again, the closed loop will show: