In the circuit given below, V(t) is the sinusoidal voltage source, voltage drop VAB(t) across the resistance R is
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(a) Is half wave rectified |
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(b) Is full wave rectified |
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(c) Has the same peak value in the positive and negative half cycles |
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(d) Has different peak values during positive and negative half cycle |
(d) Has different peak values during positive and negative half cycle
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As shown in the figure, a very thin sheet of aluminium is placed in between the plates of the condenser. Then the capacity
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(a) Will increase |
(b) Will decrease |
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(c) Remains unchanged |
(d) May increase or decrease |
A beam of well collimated cathode rays travelling with a speed of 5 
enter a region of mutually perpendicular electric and magnetic fields and emerge undeviated from this region. If |B| = 0.02T, the magnitude of the electric field is
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(a) |
(b) 2.5 |
(c) 1.25 |
(d) 2 |
If an interference pattern have maximum and minimum intensities in 36 : 1 ratio then what will be the ratio of amplitudes
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(a) 5 : 7 |
(b) 7 : 4 |
(c) 4 : 7 |
(d) 7 : 5 |
